Submitted URL: https://url6566.frontendmasters.com/ls/click?upn=u001.TNm8zzPIJE9yk0S307i0pvtHYHzOuDpuSM6xY1gH-2FA1Z70x4yW7ReA1gqC30U4uDNkgzmsREyabD...
Effective URL: https://www.joshwcomeau.com/css/center-a-div/
Submission: On March 08 via api from US — Scanned from DE

Summary

This website contacted 2 IPs in 2 countries across 3 domains to perform 107 HTTP transactions. The main IP is 76.76.21.9, located in Walnut, United States and belongs to AMAZON-02, US. The main domain is www.joshwcomeau.com. The Cisco Umbrella rank of the primary domain is 913227.
TLS certificate: Issued by R3 on February 29th 2024. Valid for: 3 months.
This is the only time www.joshwcomeau.com was scanned on urlscan.io!

urlscan.io Verdict: No classification

Domain & IP information

IP Address AS Autonomous System
1 1 2600:9000:225... 16509 (AMAZON-02)
2 107 76.76.21.9 16509 (AMAZON-02)
2 54.194.111.56 16509 (AMAZON-02)
107 2
Apex Domain
Subdomains
Transfer
107 joshwcomeau.com
www.joshwcomeau.com — Cisco Umbrella Rank: 913227
2 MB
2 vercel-insights.com
vitals.vercel-insights.com — Cisco Umbrella Rank: 11947
331 B
1 frontendmasters.com
url6566.frontendmasters.com
466 B
107 3
Domain Requested by
107 www.joshwcomeau.com 2 redirects www.joshwcomeau.com
2 vitals.vercel-insights.com www.joshwcomeau.com
1 url6566.frontendmasters.com 1 redirects
107 3

This site contains links to these domains. Also see Links.

Domain
caniuse.com
css-for-js.dev
twitter.com
Subject Issuer Validity Valid
*.joshwcomeau.com
R3
2024-02-29 -
2024-05-29
3 months crt.sh
vercel-insights.com
Amazon RSA 2048 M03
2023-08-23 -
2024-09-19
a year crt.sh

This page contains 1 frames:

Primary Page: https://www.joshwcomeau.com/css/center-a-div/
Frame ID: 9126CAC0E155B2D49170D400BB7B0DE6
Requests: 107 HTTP requests in this frame

Screenshot

Page Title

How To Center a DivRSS Feed

Page URL History Show full URLs

  1. https://url6566.frontendmasters.com/ls/click?upn=u001.TNm8zzPIJE9yk0S307i0pvtHYHzOuDpuSM6xY1gH-2FA1Z70x4yW7ReA1g... HTTP 302
    https://www.joshwcomeau.com/css/center-a-div/ Page URL

Page Statistics

107
Requests

98 %
HTTPS

33 %
IPv6

3
Domains

3
Subdomains

2
IPs

2
Countries

1634 kB
Transfer

3229 kB
Size

0
Cookies

Page URL History

This captures the URL locations of the websites, including HTTP redirects and client-side redirects via JavaScript or Meta fields.

  1. https://url6566.frontendmasters.com/ls/click?upn=u001.TNm8zzPIJE9yk0S307i0pvtHYHzOuDpuSM6xY1gH-2FA1Z70x4yW7ReA1gqC30U4uDNkgzmsREyabDpowGN-2BVKcw-3D-3D-zRu_XVgYBxvWEj9XHYC6WYC0-2BPZxo1Ljfw1P7-2BMDu9GOCwcYJnziUnEjI9zk7Jx9ILsYEIXBJ5thdTtu3NXcaJqo3-2FoBjLjESbCUMM-2F-2FB6p8Fpng-2Bb1tUN64HT8urqqKPay1Y3DJ2gSWnbHNxRIqi-2FlZI2lnXYFdbymzn8T-2BUkrAFaiFnfqx0OeoDN4G1onc-2FeDsymaIhBhdJfLrcrAg60cWpNNfRAaaiuFezKcDb9c50BsGnsqmB3Fv-2F-2BVFDAvqO1wtNTEG5scmo4k-2BCdW8N12GqaJV4UKPx-2BQQtF-2Bhh8akj3FmD0GDQLidAIvvWngDXBQuS1cvm9jv23NFBQRXEbJniXugrtpx0ZvpUK-2B9kmvkP3aA7tZcNYocQ-2FoWyi0AN83BqPl4VhLG1Lx28JTkF0-2BJ-2BzA-2F8P97vKpYMhrPxI8yzK9vj-2BKoj0DQbK2GUvzTHgurHXMJ5YBzpV3JJyd1YkZxYMSB8mIDfeEV15v3NP7NWBcb3awTSuxJ0gQpUofdYZfHZSmOC28oYdUrffw97tGlQkXU13ACcIa6aIaNVEBv5pZvbShd7GMsnurCcRHV0SnRL1FBeCFtNdcoLNn6ASnyt5rWrv5Ag7Y7ujBNPlVptUCH3b-2FbKIf2R2wMk8YJCppGBjnxLAR7A4IeBJjGr90uqGxty8WYOGT2Yc7d6cW-2FQGcpGcejkV2Jg67SrPASzH3IXpw09fRXnS5yyxUQv-2BjpDPfgcvr1lgIx3flkOfHAXbEoDARAP0C5HY-2B-2Boxa7Jzrnk3SSLdcVT8Z-2B4jAvxoaWUSVKviupr1rRMSU81AMwzXBhEB0qqezJ56UtZS3KjJirnwhYqaFEsC-2FUbu5UDiViUP6JIhLytslL61kzS7iDLsFaBRczKu84dJaAGh3e35YcbjXaz1Z4Y7xrP5DIjFLdPFNAmPTY3i0j1Jxbn4oMC4bkIngn0-2BA0g9tCxoRQS3eRnp1DlJ-2FvjQUpLdxLbjA5A7c79MxZVgTMLQZ-2BlY9W6zelDyoz4PNxvaekUIl3vyFEXpRSe5P0PvBMVOYtKJRevg-3D-3D HTTP 302
    https://www.joshwcomeau.com/css/center-a-div/ Page URL

Redirected requests

There were HTTP redirect chains for the following requests:

Request Chain 54
  • https://www.joshwcomeau.com/api/get-article-likes?slug=center-a-div&userId=wifqoaui HTTP 308
  • https://www.joshwcomeau.com/api/get-article-likes/?slug=center-a-div&userId=wifqoaui
Request Chain 55
  • https://www.joshwcomeau.com/api/get-article-hits?slug=center-a-div HTTP 308
  • https://www.joshwcomeau.com/api/get-article-hits/?slug=center-a-div

107 HTTP transactions

Resource
Path
Size
x-fer
Type
MIME-Type
Primary Request /
www.joshwcomeau.com/css/center-a-div/
Redirect Chain
  • https://url6566.frontendmasters.com/ls/click?upn=u001.TNm8zzPIJE9yk0S307i0pvtHYHzOuDpuSM6xY1gH-2FA1Z70x4yW7ReA1gqC30U4uDNkgzmsREyabDpowGN-2BVKcw-3D-3D-zRu_XVgYBxvWEj9XHYC6WYC0-2BPZxo1Ljfw1P7-2BMDu9...
  • https://www.joshwcomeau.com/css/center-a-div/
322 KB
44 KB
Document
General
Full URL
https://www.joshwcomeau.com/css/center-a-div/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.9 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
14784ef94ba977b09a468e0a72efc389dd98816c0b3199afd937c7abb88f86a6
Security Headers
Name Value
Strict-Transport-Security max-age=63072000; includeSubDomains; preload
X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Request headers

Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36
accept-language
de-DE,de;q=0.9

Response headers

access-control-allow-origin
*
age
627119
cache-control
public, max-age=0, must-revalidate
content-disposition
inline
content-encoding
br
content-type
text/html; charset=utf-8
date
Fri, 08 Mar 2024 05:22:34 GMT
etag
W/"e669dc88082cd5aec000546fe209202b"
server
Vercel
strict-transport-security
max-age=63072000; includeSubDomains; preload
vary
RSC, Next-Router-State-Tree, Next-Router-Prefetch
x-frame-options
SAMEORIGIN
x-matched-path
/css/center-a-div/
x-vercel-cache
HIT
x-vercel-id
fra1::6p9sc-1709875354738-894a5fa9d606
x-xss-protection
1; mode=block

Redirect headers

content-length
68
content-type
text/html; charset=utf-8
date
Fri, 08 Mar 2024 05:22:34 GMT
location
https://www.joshwcomeau.com/css/center-a-div/
via
1.1 a4a80ac7ffee78c042728f52e3f729e0.cloudfront.net (CloudFront)
x-amz-apigw-id
US4IGEUJPHcEAog=
x-amz-cf-id
a8W5RunnQlfVXZJ3pH_T9LyiI-OsOXAFJu4vNC5l_vRKjP0EGsastA==
x-amz-cf-pop
MUC50-P1
x-amzn-remapped-connection
keep-alive
x-amzn-remapped-content-length
68
x-amzn-remapped-date
Fri, 08 Mar 2024 05:22:34 GMT
x-amzn-remapped-server
nginx
x-amzn-requestid
2cb40100-826c-4ea4-b9b2-8b639b133997
x-cache
Miss from cloudfront
x-robots-tag
noindex, nofollow
b464091f97cce002.css
www.joshwcomeau.com/_next/static/css/
2 KB
1 KB
Stylesheet
General
Full URL
https://www.joshwcomeau.com/_next/static/css/b464091f97cce002.css
Requested by
Host: www.joshwcomeau.com
URL: https://www.joshwcomeau.com/css/center-a-div/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.9 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
8f70bede9b22b438208a1da8301dcac120b2073bb2fb98a29982ec2aae6397f0
Security Headers
Name Value
Strict-Transport-Security max-age=63072000; includeSubDomains; preload
X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://www.joshwcomeau.com/css/center-a-div/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Fri, 08 Mar 2024 05:22:34 GMT
content-encoding
br
strict-transport-security
max-age=63072000; includeSubDomains; preload
server
Vercel
x-vercel-id
fra1::qhpzp-1709875354855-01b6fad352d9
age
591080
x-matched-path
/_next/static/css/b464091f97cce002.css
etag
W/"10e69c242df964e42913c22f310526b7"
x-vercel-cache
HIT
x-frame-options
SAMEORIGIN
content-type
text/css; charset=utf-8
access-control-allow-origin
*
cache-control
public,max-age=31536000,immutable
content-disposition
inline; filename="b464091f97cce002.css"
x-xss-protection
1; mode=block
cb9d5baaf1862e08.css
www.joshwcomeau.com/_next/static/css/
38 KB
10 KB
Stylesheet
General
Full URL
https://www.joshwcomeau.com/_next/static/css/cb9d5baaf1862e08.css
Requested by
Host: www.joshwcomeau.com
URL: https://www.joshwcomeau.com/css/center-a-div/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.9 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
98eadeb4d3eea0bdfab314a43459e729cbd41d32abc867fda776ac5615c1b246
Security Headers
Name Value
Strict-Transport-Security max-age=63072000; includeSubDomains; preload
X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://www.joshwcomeau.com/css/center-a-div/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Fri, 08 Mar 2024 05:22:34 GMT
content-encoding
br
strict-transport-security
max-age=63072000; includeSubDomains; preload
server
Vercel
x-vercel-id
fra1::2vkx2-1709875354855-67ddabe6ef9e
age
626825
x-matched-path
/_next/static/css/cb9d5baaf1862e08.css
etag
W/"435d6aab8e01b89493b95fcddf7c7acb"
x-vercel-cache
HIT
x-frame-options
SAMEORIGIN
content-type
text/css; charset=utf-8
access-control-allow-origin
*
cache-control
public,max-age=31536000,immutable
content-disposition
inline; filename="cb9d5baaf1862e08.css"
x-xss-protection
1; mode=block
f0e45107-150ce001be48a7d6.js
www.joshwcomeau.com/_next/static/chunks/
166 KB
50 KB
Script
General
Full URL
https://www.joshwcomeau.com/_next/static/chunks/f0e45107-150ce001be48a7d6.js
Requested by
Host: www.joshwcomeau.com
URL: https://www.joshwcomeau.com/css/center-a-div/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.9 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
313e05579867eab939647cd24e3b9f9f74c3e19cc77895e0c98a3888768e56ec
Security Headers
Name Value
Strict-Transport-Security max-age=63072000; includeSubDomains; preload
X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://www.joshwcomeau.com/css/center-a-div/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Fri, 08 Mar 2024 05:22:34 GMT
content-encoding
br
strict-transport-security
max-age=63072000; includeSubDomains; preload
server
Vercel
x-vercel-id
fra1::ppkjc-1709875354873-09a699f8fa76
age
612847
x-matched-path
/_next/static/chunks/f0e45107-150ce001be48a7d6.js
etag
W/"b2d1995a1b6f0d24811a6def04b22459"
x-vercel-cache
HIT
x-frame-options
SAMEORIGIN
content-type
application/javascript; charset=utf-8
access-control-allow-origin
*
cache-control
public,max-age=31536000,immutable
content-disposition
inline; filename="f0e45107-150ce001be48a7d6.js"
x-xss-protection
1; mode=block
3841-1ff94451ec11b87d.js
www.joshwcomeau.com/_next/static/chunks/
95 KB
34 KB
Script
General
Full URL
https://www.joshwcomeau.com/_next/static/chunks/3841-1ff94451ec11b87d.js
Requested by
Host: www.joshwcomeau.com
URL: https://www.joshwcomeau.com/css/center-a-div/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.9 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
df73e2f991e3fef3a05860fe222d08761c496a426b46dfedcbab96be44b921ed
Security Headers
Name Value
Strict-Transport-Security max-age=63072000; includeSubDomains; preload
X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://www.joshwcomeau.com/css/center-a-div/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Fri, 08 Mar 2024 05:22:34 GMT
content-encoding
br
strict-transport-security
max-age=63072000; includeSubDomains; preload
server
Vercel
x-vercel-id
fra1::2nwz7-1709875354873-318ecfbcb447
age
626825
x-matched-path
/_next/static/chunks/3841-1ff94451ec11b87d.js
etag
W/"0f7c4509bb19e38ce01eddb0fd24913b"
x-vercel-cache
HIT
x-frame-options
SAMEORIGIN
content-type
application/javascript; charset=utf-8
access-control-allow-origin
*
cache-control
public,max-age=31536000,immutable
content-disposition
inline; filename="3841-1ff94451ec11b87d.js"
x-xss-protection
1; mode=block
8764-0c68f410b667140b.js
www.joshwcomeau.com/_next/static/chunks/
22 KB
8 KB
Script
General
Full URL
https://www.joshwcomeau.com/_next/static/chunks/8764-0c68f410b667140b.js
Requested by
Host: www.joshwcomeau.com
URL: https://www.joshwcomeau.com/css/center-a-div/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.9 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
dff61fe075436d594bc6aa794e05e95d6df87f6497bed58550bb207cfd725fd6
Security Headers
Name Value
Strict-Transport-Security max-age=63072000; includeSubDomains; preload
X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://www.joshwcomeau.com/css/center-a-div/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Fri, 08 Mar 2024 05:22:34 GMT
content-encoding
br
strict-transport-security
max-age=63072000; includeSubDomains; preload
server
Vercel
x-vercel-id
fra1::5c5h9-1709875354873-fb13de962286
age
558313
x-matched-path
/_next/static/chunks/8764-0c68f410b667140b.js
etag
W/"5967a10169bafbe74651b3e8982d8a35"
x-vercel-cache
HIT
x-frame-options
SAMEORIGIN
content-type
application/javascript; charset=utf-8
access-control-allow-origin
*
cache-control
public,max-age=31536000,immutable
content-disposition
inline; filename="8764-0c68f410b667140b.js"
x-xss-protection
1; mode=block
1588-ea91a29b42ef4796.js
www.joshwcomeau.com/_next/static/chunks/
402 KB
68 KB
Script
General
Full URL
https://www.joshwcomeau.com/_next/static/chunks/1588-ea91a29b42ef4796.js
Requested by
Host: www.joshwcomeau.com
URL: https://www.joshwcomeau.com/css/center-a-div/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.9 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
93b21209e46a9483ca31da1da9130e7b7b668afb1108f94862b660741a9b3fb5
Security Headers
Name Value
Strict-Transport-Security max-age=63072000; includeSubDomains; preload
X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://www.joshwcomeau.com/css/center-a-div/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Fri, 08 Mar 2024 05:22:34 GMT
content-encoding
br
strict-transport-security
max-age=63072000; includeSubDomains; preload
server
Vercel
x-vercel-id
fra1::kswk9-1709875354873-f7d6e8a8903c
age
626965
x-matched-path
/_next/static/chunks/1588-ea91a29b42ef4796.js
etag
W/"3cf44e747860d9bb69fc00985a01602a"
x-vercel-cache
HIT
x-frame-options
SAMEORIGIN
content-type
application/javascript; charset=utf-8
access-control-allow-origin
*
cache-control
public,max-age=31536000,immutable
content-disposition
inline; filename="1588-ea91a29b42ef4796.js"
x-xss-protection
1; mode=block
8491-4965d8f5bcc44384.js
www.joshwcomeau.com/_next/static/chunks/
21 KB
6 KB
Script
General
Full URL
https://www.joshwcomeau.com/_next/static/chunks/8491-4965d8f5bcc44384.js
Requested by
Host: www.joshwcomeau.com
URL: https://www.joshwcomeau.com/css/center-a-div/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.9 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
c1c4395c15ccd0a12d7457de51f684185ee8eeca181bb602bea7ff10e5948101
Security Headers
Name Value
Strict-Transport-Security max-age=63072000; includeSubDomains; preload
X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://www.joshwcomeau.com/css/center-a-div/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Fri, 08 Mar 2024 05:22:34 GMT
content-encoding
br
strict-transport-security
max-age=63072000; includeSubDomains; preload
server
Vercel
x-vercel-id
fra1::4c99r-1709875354873-4647af110d0a
age
626012
x-matched-path
/_next/static/chunks/8491-4965d8f5bcc44384.js
etag
W/"5dee0296cd94414846845808943f147a"
x-vercel-cache
HIT
x-frame-options
SAMEORIGIN
content-type
application/javascript; charset=utf-8
access-control-allow-origin
*
cache-control
public,max-age=31536000,immutable
content-disposition
inline; filename="8491-4965d8f5bcc44384.js"
x-xss-protection
1; mode=block
4067.964342f5a1e30753.js
www.joshwcomeau.com/_next/static/chunks/
23 KB
7 KB
Script
General
Full URL
https://www.joshwcomeau.com/_next/static/chunks/4067.964342f5a1e30753.js
Requested by
Host: www.joshwcomeau.com
URL: https://www.joshwcomeau.com/css/center-a-div/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.9 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
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Security Headers
Name Value
Strict-Transport-Security max-age=63072000; includeSubDomains; preload
X-Frame-Options SAMEORIGIN
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Request headers

accept-language
de-DE,de;q=0.9
Referer
https://www.joshwcomeau.com/css/center-a-div/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Fri, 08 Mar 2024 05:22:34 GMT
content-encoding
br
strict-transport-security
max-age=63072000; includeSubDomains; preload
server
Vercel
x-vercel-id
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age
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x-matched-path
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etag
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x-vercel-cache
HIT
x-frame-options
SAMEORIGIN
content-type
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access-control-allow-origin
*
cache-control
public,max-age=31536000,immutable
content-disposition
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x-xss-protection
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www.joshwcomeau.com/_next/static/chunks/
20 KB
6 KB
Script
General
Full URL
https://www.joshwcomeau.com/_next/static/chunks/6820.f3edf2d97a590508.js
Requested by
Host: www.joshwcomeau.com
URL: https://www.joshwcomeau.com/css/center-a-div/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.9 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
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Security Headers
Name Value
Strict-Transport-Security max-age=63072000; includeSubDomains; preload
X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://www.joshwcomeau.com/css/center-a-div/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Fri, 08 Mar 2024 05:22:34 GMT
content-encoding
br
strict-transport-security
max-age=63072000; includeSubDomains; preload
server
Vercel
x-vercel-id
fra1::r4kb5-1709875354873-c5f6d5374585
age
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x-matched-path
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etag
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x-vercel-cache
HIT
x-frame-options
SAMEORIGIN
content-type
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access-control-allow-origin
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cache-control
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content-disposition
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x-xss-protection
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20 KB
6 KB
Script
General
Full URL
https://www.joshwcomeau.com/_next/static/chunks/8520.0cab8a71afe1d79e.js
Requested by
Host: www.joshwcomeau.com
URL: https://www.joshwcomeau.com/css/center-a-div/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.9 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
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Security Headers
Name Value
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X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://www.joshwcomeau.com/css/center-a-div/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Fri, 08 Mar 2024 05:22:34 GMT
content-encoding
br
strict-transport-security
max-age=63072000; includeSubDomains; preload
server
Vercel
x-vercel-id
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age
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x-matched-path
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etag
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x-vercel-cache
HIT
x-frame-options
SAMEORIGIN
content-type
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access-control-allow-origin
*
cache-control
public,max-age=31536000,immutable
content-disposition
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x-xss-protection
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24 KB
7 KB
Script
General
Full URL
https://www.joshwcomeau.com/_next/static/chunks/4163.33490097ca8de0ca.js
Requested by
Host: www.joshwcomeau.com
URL: https://www.joshwcomeau.com/css/center-a-div/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.9 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
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Security Headers
Name Value
Strict-Transport-Security max-age=63072000; includeSubDomains; preload
X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://www.joshwcomeau.com/css/center-a-div/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Fri, 08 Mar 2024 05:22:34 GMT
content-encoding
br
strict-transport-security
max-age=63072000; includeSubDomains; preload
server
Vercel
x-vercel-id
fra1::2nwz7-1709875354889-665841b2522f
age
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x-matched-path
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etag
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x-vercel-cache
HIT
x-frame-options
SAMEORIGIN
content-type
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access-control-allow-origin
*
cache-control
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content-disposition
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x-xss-protection
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22 KB
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Script
General
Full URL
https://www.joshwcomeau.com/_next/static/chunks/3399.b954dbeb2a96bf54.js
Requested by
Host: www.joshwcomeau.com
URL: https://www.joshwcomeau.com/css/center-a-div/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.9 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
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Security Headers
Name Value
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X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://www.joshwcomeau.com/css/center-a-div/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Fri, 08 Mar 2024 05:22:34 GMT
content-encoding
br
strict-transport-security
max-age=63072000; includeSubDomains; preload
server
Vercel
x-vercel-id
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age
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x-matched-path
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etag
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x-vercel-cache
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x-frame-options
SAMEORIGIN
content-type
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access-control-allow-origin
*
cache-control
public,max-age=31536000,immutable
content-disposition
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22 KB
6 KB
Script
General
Full URL
https://www.joshwcomeau.com/_next/static/chunks/8561.e22d010013df6d39.js
Requested by
Host: www.joshwcomeau.com
URL: https://www.joshwcomeau.com/css/center-a-div/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.9 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
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Security Headers
Name Value
Strict-Transport-Security max-age=63072000; includeSubDomains; preload
X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://www.joshwcomeau.com/css/center-a-div/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Fri, 08 Mar 2024 05:22:34 GMT
content-encoding
br
strict-transport-security
max-age=63072000; includeSubDomains; preload
server
Vercel
x-vercel-id
fra1::kswk9-1709875354889-32971aa79026
age
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x-matched-path
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etag
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x-vercel-cache
HIT
x-frame-options
SAMEORIGIN
content-type
application/javascript; charset=utf-8
access-control-allow-origin
*
cache-control
public,max-age=31536000,immutable
content-disposition
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x-xss-protection
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www.joshwcomeau.com/_next/static/chunks/
21 KB
6 KB
Script
General
Full URL
https://www.joshwcomeau.com/_next/static/chunks/5521.82e0dd73a6428829.js
Requested by
Host: www.joshwcomeau.com
URL: https://www.joshwcomeau.com/css/center-a-div/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.9 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
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Security Headers
Name Value
Strict-Transport-Security max-age=63072000; includeSubDomains; preload
X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://www.joshwcomeau.com/css/center-a-div/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Fri, 08 Mar 2024 05:22:34 GMT
content-encoding
br
strict-transport-security
max-age=63072000; includeSubDomains; preload
server
Vercel
x-vercel-id
fra1::6pxrk-1709875354889-f57b735ffd8b
age
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x-matched-path
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etag
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x-vercel-cache
HIT
x-frame-options
SAMEORIGIN
content-type
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access-control-allow-origin
*
cache-control
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content-disposition
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x-xss-protection
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19 KB
6 KB
Script
General
Full URL
https://www.joshwcomeau.com/_next/static/chunks/2874.d8024d929e13634d.js
Requested by
Host: www.joshwcomeau.com
URL: https://www.joshwcomeau.com/css/center-a-div/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.9 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
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Security Headers
Name Value
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X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://www.joshwcomeau.com/css/center-a-div/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Fri, 08 Mar 2024 05:22:34 GMT
content-encoding
br
strict-transport-security
max-age=63072000; includeSubDomains; preload
server
Vercel
x-vercel-id
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age
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x-matched-path
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etag
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x-vercel-cache
HIT
x-frame-options
SAMEORIGIN
content-type
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access-control-allow-origin
*
cache-control
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content-disposition
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x-xss-protection
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20 KB
6 KB
Script
General
Full URL
https://www.joshwcomeau.com/_next/static/chunks/5160.1481f6414aacc19f.js
Requested by
Host: www.joshwcomeau.com
URL: https://www.joshwcomeau.com/css/center-a-div/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.9 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
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Security Headers
Name Value
Strict-Transport-Security max-age=63072000; includeSubDomains; preload
X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://www.joshwcomeau.com/css/center-a-div/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Fri, 08 Mar 2024 05:22:34 GMT
content-encoding
br
strict-transport-security
max-age=63072000; includeSubDomains; preload
server
Vercel
x-vercel-id
fra1::r4kb5-1709875354889-8ab0bc56325d
age
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x-matched-path
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etag
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x-vercel-cache
HIT
x-frame-options
SAMEORIGIN
content-type
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access-control-allow-origin
*
cache-control
public,max-age=31536000,immutable
content-disposition
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x-xss-protection
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20 KB
6 KB
Script
General
Full URL
https://www.joshwcomeau.com/_next/static/chunks/2418.ffc734bcc49df4a0.js
Requested by
Host: www.joshwcomeau.com
URL: https://www.joshwcomeau.com/css/center-a-div/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.9 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
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Security Headers
Name Value
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X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://www.joshwcomeau.com/css/center-a-div/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Fri, 08 Mar 2024 05:22:34 GMT
content-encoding
br
strict-transport-security
max-age=63072000; includeSubDomains; preload
server
Vercel
x-vercel-id
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age
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x-matched-path
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etag
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x-vercel-cache
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x-frame-options
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content-type
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*
cache-control
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content-disposition
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25 KB
8 KB
Script
General
Full URL
https://www.joshwcomeau.com/_next/static/chunks/5249.a49c4023fbbf6ad7.js
Requested by
Host: www.joshwcomeau.com
URL: https://www.joshwcomeau.com/css/center-a-div/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.9 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
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Security Headers
Name Value
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X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://www.joshwcomeau.com/css/center-a-div/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Fri, 08 Mar 2024 05:22:34 GMT
content-encoding
br
strict-transport-security
max-age=63072000; includeSubDomains; preload
server
Vercel
x-vercel-id
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etag
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x-vercel-cache
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x-frame-options
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content-type
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access-control-allow-origin
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cache-control
public,max-age=31536000,immutable
content-disposition
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20 KB
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Script
General
Full URL
https://www.joshwcomeau.com/_next/static/chunks/7605.8118f57355a21041.js
Requested by
Host: www.joshwcomeau.com
URL: https://www.joshwcomeau.com/css/center-a-div/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.9 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
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Security Headers
Name Value
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X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://www.joshwcomeau.com/css/center-a-div/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Fri, 08 Mar 2024 05:22:34 GMT
content-encoding
br
strict-transport-security
max-age=63072000; includeSubDomains; preload
server
Vercel
x-vercel-id
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age
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x-matched-path
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etag
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x-vercel-cache
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x-frame-options
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content-type
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cache-control
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20 KB
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Script
General
Full URL
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Requested by
Host: www.joshwcomeau.com
URL: https://www.joshwcomeau.com/css/center-a-div/
Protocol
H2
Security
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URL: https://www.joshwcomeau.com/_next/static/chunks/1766.a5b2110d6c081d23.js
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.9 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
b40e03db63b70d2d96ac88fbc60d9c00e920ed05817bb56e6824a10fa981859b
Security Headers
Name Value
Strict-Transport-Security max-age=63072000; includeSubDomains; preload
X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://www.joshwcomeau.com/css/center-a-div/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Fri, 08 Mar 2024 05:22:35 GMT
strict-transport-security
max-age=63072000; includeSubDomains; preload
age
626963
content-disposition
inline; filename="pop-down.mp3"
content-length
2536
x-xss-protection
1; mode=block
server
Vercel
x-vercel-id
fra1::vrkbh-1709875355671-c0c8fe26fe8b
x-matched-path
/sounds/pop-down.mp3
etag
"a0249d355a7e4bbba56b8af25c537184"
x-vercel-cache
HIT
x-frame-options
SAMEORIGIN
content-type
audio/mpeg
access-control-allow-origin
*
cache-control
public, max-age=0, must-revalidate
accept-ranges
bytes
pop-up-on.mp3
www.joshwcomeau.com/sounds/
2 KB
3 KB
XHR
General
Full URL
https://www.joshwcomeau.com/sounds/pop-up-on.mp3
Requested by
Host: www.joshwcomeau.com
URL: https://www.joshwcomeau.com/_next/static/chunks/1766.a5b2110d6c081d23.js
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.9 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
1d90883e0fd97c938b8fcbbbf2707e19374a981496794301873fea027e3a394c
Security Headers
Name Value
Strict-Transport-Security max-age=63072000; includeSubDomains; preload
X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://www.joshwcomeau.com/css/center-a-div/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Fri, 08 Mar 2024 05:22:35 GMT
strict-transport-security
max-age=63072000; includeSubDomains; preload
age
626963
content-disposition
inline; filename="pop-up-on.mp3"
content-length
2536
x-xss-protection
1; mode=block
server
Vercel
x-vercel-id
fra1::c6hrn-1709875355671-a3f9f40672d6
x-matched-path
/sounds/pop-up-on.mp3
etag
"62bc5a542c2aab8472d1442d4eabb65b"
x-vercel-cache
HIT
x-frame-options
SAMEORIGIN
content-type
audio/mpeg
access-control-allow-origin
*
cache-control
public, max-age=0, must-revalidate
accept-ranges
bytes
pop-up-off.mp3
www.joshwcomeau.com/sounds/
4 KB
4 KB
XHR
General
Full URL
https://www.joshwcomeau.com/sounds/pop-up-off.mp3
Requested by
Host: www.joshwcomeau.com
URL: https://www.joshwcomeau.com/_next/static/chunks/1766.a5b2110d6c081d23.js
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
76.76.21.9 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
Vercel /
Resource Hash
59f27b738178d8bb222e4ac3cedb43188d0b3a959ab6f4a6cb9ad86afdc08218
Security Headers
Name Value
Strict-Transport-Security max-age=63072000; includeSubDomains; preload
X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://www.joshwcomeau.com/css/center-a-div/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.111 Safari/537.36

Response headers

date
Fri, 08 Mar 2024 05:22:35 GMT
strict-transport-security
max-age=63072000; includeSubDomains; preload
age
567594
content-disposition
inline; filename="pop-up-off.mp3"
content-length
3788
x-xss-protection
1; mode=block
server
Vercel
x-vercel-id
fra1::xlq9b-1709875355674-c0e013d62eca
x-matched-path
/sounds/pop-up-off.mp3
etag
"a7ba8587a3e259ce8316dd211a5e6379"
x-vercel-cache
HIT
x-frame-options
SAMEORIGIN
content-type
audio/mpeg
access-control-allow-origin
*
cache-control
public, max-age=0, must-revalidate
accept-ranges
bytes

Verdicts & Comments Add Verdict or Comment

23 JavaScript Global Variables

These are the non-standard "global" variables defined on the window object. These can be helpful in identifying possible client-side frameworks and code.

function| $RC object| webpackChunk_N_E function| __next_require__ object| next object| __NEXT_DATA__ function| __SSG_MANIFEST_CB object| __NEXT_P object| _N_E function| applyFocusVisiblePolyfill function| __NEXT_PRELOADREADY object| regjsgen object| __core-js_shared__ object| core object| __MIDDLEWARE_MATCHERS object| __BUILD_MANIFEST object| __SSG_MANIFEST string| vam function| va function| HowlerGlobal object| Howler function| Howl function| Sound boolean| vai

0 Cookies

1 Console Messages

Source Level URL
Text
other warning URL: https://www.joshwcomeau.com/_next/static/chunks/1766.a5b2110d6c081d23.js
Message:
The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://goo.gl/7K7WLu

Security Headers

This page lists any security headers set by the main page. If you want to understand what these mean and how to use them, head on over to this page

Header Value
Strict-Transport-Security max-age=63072000; includeSubDomains; preload
X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Indicators

This is a term in the security industry to describe indicators such as IPs, Domains, Hashes, etc. This does not imply that any of these indicate malicious activity.

url6566.frontendmasters.com
vitals.vercel-insights.com
www.joshwcomeau.com
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