What's New In DevTools (Chrome 84)
Fix site issues with the new Issues tab #
The new Issues tab in the Drawer aims to help reduce the notification fatigue and clutter of the Console. Currently, the Console is the central place for website developers, libraries, frameworks, and Chrome itself to log messages, warnings, and errors. The Issues tab presents warnings from the browser in a structured, aggregated, and actionable way, links to affected resources within DevTools, and provides guidance on how to fix the issues. Over time, more and more of Chrome's warnings will be surfaced in the Issues tab rather than the Console, which should help reduce the Console's clutter.
Check out Find And Fix Problems With The Chrome DevTools Issues Tab to get started.
Chromium Bug: #1068116
View accessibility information in the Inspect Mode tooltip #
Chromium Bug: #1040025
Performance panel updates #
View Total Blocking Time (TBT) information in the footer #
To get Total Blocking Time information, do not use the Reload Page workflow for recording page load performance. Instead, click Record , manually reload the page, wait for the page to load, and then stop recording. If you see
Total Blocking Time: Unavailable it means that DevTools did not get the information it needs from Chrome's internal profiling data.
Chromium Bug: #1054381
Layout Shift events in the new Experience section #
The new Experience section of the Performance panel can help you detect layout shifts. Cumulative Layout Shift (CLS) is a metric that can help you quantify unwanted visual instability and is one of Google's new Core Web Vitals.
Click a Layout Shift event to see the details of the layout shift in the Summary tab. Hover over the Moved from and Moved to fields to visualize where the layout shift occurred.
More accurate promise terminology in the Console #
When logging a
Promise the Console used to incorrectly describe the state of the
The Console now uses the term
fulfilled, which aligns with the
V8 Bug: #6751
Styles pane updates #
Support for the
revert keyword #
The Styles pane's autocomplete UI now detects the
revert CSS keyword, which reverts the cascaded value of a property to what the value would have been if no changes had been made to the element's styling.
Chromium Bug: #1075437
Image previews #
Hover over a
background-image value in the Styles pane to see a preview of the image in a tooltip.
Chromium Bug: #1040019
Color Picker now uses space-separated functional color notation #
CSS Color Module Level 4 specifies that color functions like
rgb() should support space-separated arguments. For example,
rgb(0, 0, 0) is equivalent to
rgb(0 0 0).
When you choose colors with the Color Picker or alternate between color representations in the Styles pane by holding Shift and then clicking the color value, you'll now see the space-separated argument syntax.
You'll also see the syntax in the Computed pane and the Inspect Mode tooltip.
DevTools is using the new syntax because upcoming CSS features like
color() do not support the deprecated comma-separated argument syntax.
The space-separated argument syntax has been supported in most browsers for a while. See Can I use Space-separated functional color notations?
Chromium Bug: #1072952
Deprecation of the Properties pane in the Elements panel #
The Properties pane in the Elements panel has been deprecated. Run
console.dir($0) in the Console instead.
App shortcuts support in the Manifest pane #
App shortcuts help users quickly start common or recommended tasks within a web app. The app shortcuts menu is shown only for Progressive Web Apps that are installed on the user's desktop or mobile device.
Check out Get things done quickly with app shortcuts to learn more.