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Posts by Jecelyn Yeen

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Check out my badge & claim your free JSNation 2025 remote ticket! Join 10k engineers worldwide at JSNation 2025 and meet 50 top speakers at June 12 - 16, 2025

Just booked my travel to @jsnation.gitnation.org on 12th June in Amsterdam. @devnook.bsky.social and I will be talking on all the improvements to Chrome DevTools!

You can join remote with below invite:
gitnation.com/badges/jsnat...

Or better yet, come and join in person! Great conf and great city!

11 months ago 16 4 1 0

Not that I can immediately recall. The link you have definitely is a right place to fill feature requests!

11 months ago 2 0 1 0
๐Ÿ˜Try debug the YouTube search dropdown then you know how this setting can help!
๐Ÿ˜Try debug the YouTube search dropdown then you know how this setting can help! YouTube video by Jecelyn Yeen ๐ŸŸ

Thereโ€™s a shortcut for that! Itโ€™s under the :hov menu in the Styles tab.

youtu.be/LS4_RZv-vYw?...

11 months ago 2 0 0 0

What you did matters, many of us learn from you and your awesome demos, we web devs also benefit from your works on CSS specs.

You are awesome, Adam. Sending loves. ๐Ÿฅน

Google sucks. ๐Ÿ˜ก

11 months ago 5 0 0 0
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[3/3] ... is all about family.

Thank you, Google, for the memories and experiences. Also the cute farewell pillow ๐Ÿ˜†.

So long, and thanks for all the fish! On to the next adventure after a well-deserved break. ๐Ÿคฉ

1 year ago 34 0 7 0

[2/3] ...bring to life features Iโ€™ve always wanted. Iโ€™m particularly proud of the work I did on HTTP response mocking/overriding and improving the overall mocking workflow.

This decision to move back wasnโ€™t an easy one. While coming to Germany was a career move, returning to Malaysia is... ๐Ÿ™‚

1 year ago 14 0 1 0
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[1/3] Today marks my last day at Google & in Germany. Iโ€™m heading back to Malaysia! ๐Ÿ‡ฒ๐Ÿ‡พ

Itโ€™s been an incredible 5 years working on #ChromeDevTools and browser automation with the best team ever โ€“ the amazing Chrome team! ๐Ÿ’™

One of the promises I made to myself when joining was to bring...

1 year ago 90 2 12 0
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Add a logpoint in devtools to log runtime values without adding console.log() or debugger in code.

Add a logpoint in devtools to log runtime values without adding console.log() or debugger in code.

Discovery of the day: devtools logpoints. Instead of adding console.log directly in the code, you can add a logpoint in devtools (at least in Chrome). The brilliant @jec.fish has a video about this: youtu.be/JyHjoaUhAus. No more forgotten log lines! ๐Ÿ™Œ๐Ÿป

1 year ago 6 2 0 0
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Uh oh, glitches? ๐Ÿ˜ฌ Our latest What's New in #ChromeDevTools has the answers (and more!). Watch the full update here: lnkd.in/gT9pWkha @matthiasrohmer.bsky.social

1 year ago 15 3 1 1

So many good #webperf improvements in Chrome 134 DevTools:

- Calibrated CPU throttling
- field date in perf trace
- third-party highlighting and dimming
- forced reflow insight
- DOM size insight
- Lighter console.timestamps for Extensibility API

Rolling out from today!!!

1 year ago 23 8 1 0
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๐ŸŽ‰ Chrome 134 is here! What's new in #ChromeDevTools

๐Ÿ” New: Privacy and security panel
๐Ÿ“ˆ Calibrated CPU throttling for #webperf analysis
๐Ÿฅ‡ Dim 3rd-party scripts in performance traces

....and more! Update Chrome and try them out! developer.chrome.com/blog/new-in-...

1 year ago 24 5 3 2
LCP by phase insight in DevTools Performance panel, now with both lab LCP subparts AND field LCP subparts.

LCP by phase insight in DevTools Performance panel, now with both lab LCP subparts AND field LCP subparts.

Ohhh happy to see the CrUX field LCP subparts data coming to Chrome DevTools.

Stop wasting time optimizing your front end code, if your issue is TTFB!

1 year ago 22 6 2 0
Advanced Network Analysis with Chrome DevTools #DevToolsTips
Advanced Network Analysis with Chrome DevTools #DevToolsTips YouTube video by Chrome for Developers

New video! Letโ€™s explore advanced Network panel techniques, including how to find performance bottlenecks, debug popupsโ€™ network activities, configure network conditions, and more. youtu.be/kuliHlLk9wQ

#DevToolsTips #ChromeDevTools

1 year ago 19 7 0 1
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โšก๏ธ Chrome 133 is here! What's new in #ChromeDevTools

๐Ÿค– Persistent AI chat history
๐Ÿ“ˆ Enhanced insights on image performance
๐Ÿงญ Customize performance trace navigation

....and more! Update Chrome and try them out! developer.chrome.com/blog/new-in-...

1 year ago 11 2 0 0
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If you're using Speculation Rules there's a small bug in Chrome 133 (just rolling out now) where DevTools + Local Overrides causes prerenders to crash ๐Ÿ˜ข

This only happens with DevTools open and when Local Overrides are enabled so shouldn't affect most of your usersโ€”but annoying for us developers!

1 year ago 10 4 2 0
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โšก๏ธ Chrome 132 is here! What's new in #ChromeDevTools

๐Ÿค– AI Assistance - Debug network, sources & performance with Gemini
๐Ÿ“ˆ Performance - View interaction phrases in live metrics
๐Ÿ’พ Manage Chrome extension storage

....and more! Update Chrome and try them out developer.chrome.com/blog/new-in-...

1 year ago 11 3 0 0
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Good news for those of you who prefer to keep classic #ChromeDevTools color scheme.

We added a setting to let you customize that via Settings > Preferences > Match Chrome color scheme.

1 year ago 11 2 0 0

Let's gooooo~ ๐Ÿฆธ๐Ÿฝโ€โ™‚๏ธ

1 year ago 1 0 0 0
Whatโ€™s new in DevTools: Chrome 130-132
Whatโ€™s new in DevTools: Chrome 130-132 YouTube video by Chrome for Developers

The new AI features for debugging issues are super nice!

As are @jec.fish's great acting skills ๐Ÿ˜…
www.youtube.com/watch?v=kzDU...

1 year ago 7 2 1 0
Whatโ€™s new in DevTools: Chrome 130-132
Whatโ€™s new in DevTools: Chrome 130-132 YouTube video by Chrome for Developers

I can hear @matthiasrohmer.bsky.social whispering: No, check out those AI ones ๐Ÿ˜†

6:09 in the video: youtu.be/kzDUe-f4gac?...

1 year ago 1 0 1 0
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One last "What's New in DevTools" of the year! ๐ŸŽ‰
More improvements on Network, Performance and CSS debugging! Let's go~~ https://buff.ly/3VDS8a1

@oliverdunk.com @matthiasrohmer.bsky.social #ChromeDevTools #webdev #debugging

1 year ago 8 0 0 1
Source map format specification

Ecma just approved the 1st edition of the new "Source map format" standard, ECMA-426! ๐ŸŽ‰

tc39.es/ecma426/2024/

1 year ago 160 47 2 5
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Screenshot showing the Chrome DevTools Performance tab with RSC integration.

Screenshot showing the Chrome DevTools Performance tab with RSC integration.

I'm working on built-in profiling of both Client and Server Components in Chrome DevTools Performance tab. Thanks to the new performance.measure() extensions. h/t Andrรฉs Olivares

This works in any RSC environment. In fact, this screenshot is running RSC for Parcel. h/t @devongovett.bsky.social

1 year ago 190 23 3 2
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Spot Non-Composited Animations in Chrome DevTools The animations track of a performance trace can now tell you why an animation was not composited.

Spot Non-Composited Animations in Chrome DevTools

> The animations track of a performance trace can now tell you if and why an animation was not composited.

www.bram.us/2024/12/10/s...

1 year ago 24 6 0 2
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Object.assign() - JavaScript | MDN The Object.assign() static method copies all enumerable own properties from one or more source objects to a target object. It returns the modified target object.

TIL Object.assign makes DOM creation more compact:

document.body.appendChild(
Object.assign(
document.createElement('div'),
{ className: 'foo', textContent: 'Hi' }
)
);

Learn more:

1 year ago 47 9 1 1
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Want to know if your redesign actually improved user experience? See real-world performance data with Chrome UX Report! Compare your production (old) and new designs to measure the impact. @tunetheweb.com #webperf #ChromeDevTools

Analyze perf: https://buff.ly/49lv7hM
CrUX: https://buff.ly/3BcmKsq

1 year ago 4 2 0 0
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๐Ÿฅฑ What to do when your teammate's asleep but the code's gotta be fixed? Watch to find out: youtube.com/shorts/asJGt...

@matthiasrohmer.bsky.social #DevToolsAI #CSS #webdev #debugging

1 year ago 3 1 0 0

Haha +2 more!

BRM - Bouncy Rendering Madness
How bouncy is your animations?

PKL - Page Kidding Latency
So much delays, are you kidding!?

1 year ago 0 0 2 0
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Performance you say? Join Captain Speedy to learn how to pinpoint & fix performance issues with cool insights in #ChromeDevTools. Letโ€™s dive in! ๐Ÿ“บ youtu.be/7A70hBrPL4I

@tunetheweb.com #DevToolsTips #webperf

1 year ago 28 8 1 0
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Better Code Rendering Through Virtualization How we rebuilt Codecov's code renderer from the ground up to be faster and more efficient, utilizing virtualization.

Interesting blog post by @nsdeschenes.ca about how @codecov.bsky.social made their site not crash on checker.ts (the TypeScript compiler's absurd 50k line file) along with other improvements.

sentry.engineering/blog/better-...

1 year ago 26 4 3 1