Chrome Devtools Cheatsheet

Opening Devtools

To access the developer tools, on any web page or app in Google Chrome you can use one of these options:

Select the Wrench menu at the top-right of your browser window, then select Tools → Developer tools.
Right-click on any page element and select Inspect element.
Shortcut keys: | Windows / Linux | Mac --------------------------------------------------- | ----------------- | ------------------- Open Developer Tools | Ctrl + Shift + I | ⌥ + ⌘ + I Open Developer Tools and bring focus to the Console | Ctrl + Shift + J | ⌥ + ⌘ + J Toggle Inspect Element mode | Ctrl + Shift + C | ⌥ + ⌘ + C

View the list of shortcuts: type ? when the Developer Tools window is open.

Global Shortcuts

                       | Windows / Linux  | Mac

-------------------------- | ---------------- | ------------------- Open Shortcut Help | ? | ? Next Panel | Ctrl + ] | ⌘ + ] Previous Panel | Ctrl + [ | ⌘ + [ Backwards in Panel History | Ctrl + Alt + ] | ⌘ + Alt + ] Forwards in Panel history | Ctrl + Alt + [ | ⌘ + Alt + [ Toggle Console | Esc | Esc Focus Search Box | Ctrl + F | ⌘ + F Search Across All Sources | Ctrl + Shift + F | ⌘ + ⌘ + F Find Previous | Ctrl + Shift + G | ⇧ + ⌘ + G Find Next | Ctrl + G | ⌘ + G Go to Source | Ctrl + O | ⇧ + O Go to Line | Ctrl + G | ⌘ + G Restore Default text size | Ctrl + 0 | ⇧ + 0 Zoom In | Ctrl + | ⇧ + Zoom Out | Ctrl - | ⇧ -

Elements Panel

                    | Windows / Linux                     | Mac

----------------------- | ----------------------------------- | --------------------------------- Navigate | Up, Down | Up, Down Expand / Collapse Node | Right, Left | Right, Left Expand Node | Double-Click on tag | Double-Click on tag Edit Attribute | Return or Double-Click on attribute | Enter or Double-Click on attribute

Right Clicking an Element you can:

Force Element Psuedo States: (:active, :hover, :focus, :visited)
Set breakpoints on the Elements: (Subtree Modifications, Attribute Modification, Node Removal)

Styles Sidebar

                               | Windows / Linux              | Mac

---------------------------------- | ---------------------------- | ---------------------------- Edit Rule | Double-Click | Double-Click Insert New Property | Double-Click on whitespace | Double-Click on whitespace Edit Next / Previous Property | Tab, Shift-Tab | Tab, ⇧ + Tab Increment / Decrement Value | Up, Down | Up, Down Increment / Decrement Value by 10 | Shift + Up, Shift + Down | ⇧ + Up, ⇧ + Down Increment / Decrement Value by 10 | PgUp, PgDown | PgUp, PgDown Increment / Decrement Value by 100 | Shift + PgUp, Shift + PgDown | ⇧ + PgUp, ⇧ + PgDown Increment / Decrement Value by 0.1 | Alt + Up, Alt + Down | ⌥ + Up, ⌥ + Down

Emulate an element's pseudo state (:active, :hover, :focus, :visited)

Add new style selectors

Network Panel

Understanding the information displayed within each column.

Size: Total size of resource
Content: Gzipped size of resource

Time: total duration to get response
Latency: time taken to get first byte

File that initialized the resource load
How the resource load was scheduled (script or parse)

Select the Timeline heading to change sort modes for the network.

Transparent: Latency load time
Solid: Total load time

Export network data into HAR format for reloading into Chrome another time.

Sources Panel

                        | Windows / Linux               | Mac

--------------------------- | ----------------------------- | ------------------- Continue | F8, Ctrl + / | F8, ⌘ + / Step Over | F10, Ctrl + ' | F10, ⌘ + ' Step Into | F11, Ctrl + ; | F11, ⌘ + ; Step Out | Shift + F11, Ctrl + Shift + ; | ⇧ + F11, ⇧ + ⌘ + ; Select Next Call Frame | Ctrl - . | ⌃ + . Select Previous Call Frame | Ctrl + , | ⌃ + , Evaluate Selection | Ctrl + Shift + E | ⇧ + ⌘ + E Toggle Breakpoint Condition | Click on line number | Click on line number Edit Breakpoint Condition | Right-Click on line number | Right-Click on line number

Don't Pause on Exceptions

Pause on All Exceptions (including those caught within try/catch blocks)

Pause on Uncaught Exceptions (usually the one you want)

Exceptions Documentation

Timeline Panel

                   | Windows / Linux  | Mac

---------------------- | ---------------- | ------------------- Start / Stop recording | Ctrl + E | ⌃ + E

Profiles Panel

Profiling types:

CPU profiler: shows where execution time is spent in your page's JavaScript functions
Heap profiler: shows memory distribution by your page's JavaScript objects and related DOM nodes

Console

                    | Windows / Linux  | Mac

----------------------- | ---------------- | ------------------- Next Suggestion | Tab | Tab Previous Suggestion | Shift + Tab | ⇧ + Tab Accept Suggestion | Right | Right Previous Command / Line | Up | Up Next Command / Line | Down | Down Previous Command | Ctrl + P | ⌃ + P Next Command | Ctrl + N | ⌃ + N Clear History | Ctrl + L | ⌘ + K, ⌃ + L Multiline entry | Shift + Enter | Ctrl + Return Execute | Enter | Return

Right click on console:

XMLHTTPRequest logging: Select to turn on so you can view the XHR log.
Preserve log upon navigation

Search Shortcuts

Find or navigate to specific files, methods or line numbers in an web app within the Sources panel.

                                                                  | Windows / Linux     | Mac

--------------------------------------------------------------------- | ------------------- | -------------------- Search scripts, stylesheets and snippets by filename | Ctrl + O | ⌘ + O Text search within current file | Ctrl + F | ⌘ + F Text search across all files | Ctrl + Shift + F | ⌘ + Opt + F Filter/navigate to a JavaScript function/CSS rule when viewing a file | Ctrl + Shift + O | ⌘ + ⌘ + O Launch line number dialog when viewing a file | Ctrl + K | ⌘ + L

Console API

Command	Description
console.assert(expression[, object, ...])	Tests that an expression is true. If not, it will write a message to the console and throw an exception.
console.clear()	Clears the console.
console.constructor()
console.count([title])	Writes the number of times that the line of code where count was called was executed. The optional argument title will print a message in addition to the number of the count.
console.copy()	Copies everything passed to it to the clipboard.
console.debug(object[, object, ...])	Writes a message to the console, including a hyperlink to the line where it was called.
console.dir(object)	Prints an interactive listing of all properties of the object. This looks identical to the view that you would see in the DOM tab.
console.dirxml(node)	Prints the XML source tree of an HTML or XML element. This looks identical to the view that you would see in the HTML tab. You can click on any node to inspect it in the HTML tab.
console.error(object[, object, ...])	Writes a message to the console with the visual "error" icon and color coding and a hyperlink to the line where it was called.
console.exception(error-object[, object, ...])	Prints an error message together with an interactive stack trace of JavaScript execution at the point where the exception occurred.
console.group(object[, object, ...])	Writes a message to the console and opens a nested block to indent all future messages sent to the console. Call `console.groupEnd()` to close the block.
console.groupCollapsed(object[, object, ...])	Like `console.group()`, but block is initially collapsed.
console.groupEnd()	Closes the most recently opened block created by a call to `console.group()` or `console.groupCollapsed()`.
console.hasOwnProperty()
console.info(object[, object, ...])	Writes a message to the console with the visual "info" icon and color coding and a hyperlink to the line where it was called.
console.isPrototypeOf()
console.keys()	Gives you the names of all the elements of an object.
console.log(object[, object, ...])	Writes a message to the console. You may pass as many arguments as you'd like, and they will be joined together in a space-delimited line. You can use printf-like string substitution patterns as well (see below).
console.memory()	An object that returns: `jsHeapSizeLimit, totalJSHeapSize, usedJSHeapSize` objects containing information for the current page memory use.
console.profile([title])	Turns on the JavaScript profiler. The optional argument title would contain the text to be printed in the header of the profile report.
console.profileEnd()	Turns off the JavaScript profiler and prints its report.
console.profiles()	An array of profile objects that summarizes the data from `profile()`.
console.propertyIsEnumerable()
console.table(data[, columns])	Allows to log provided data using tabular layout. The method takes one required parameter that represents table like data (array of arrays or list of objects).
console.time([name])	Creates a new timer under the given name. Call `console.timeEnd(name)` with the same name to stop the timer and print the time elapsed.
console.timeEnd()	Stops a timer created by a call to `console.time(name)` and writes the time elapsed.
console.timeStamp()
console.toLocaleString()
console.toString()
console.trace()	Prints an interactive stack trace of JavaScript execution at the point where it is called.
console.values()	Gives you all the values of those elements.
console.warn(object[, object, ...])	Writes a message to the console with the visual "warning" icon and color coding and a hyperlink to the line where it was called.
console.valueOf()
window.onerror	When exceptions are thrown in the window context and is not caught by any try/catch block, the function will be invoked with the exception's message, the URL of the file where the exception was thrown and the line number in that file passed as three arguments in that order. 'window.onerror = function(msg, url, line) { console.log('message: ' + msg, 'url: ' + url, 'line: ' + line); };`

String substitution patterns available when using console.log() are:

String: %s - console.log('The %s is a %s', animal, cat);
Integer: %d, %i - console.log('Number %d plus %i', 1, 2);
Floating point number: %f - console.log('Floating points: %f', 1.5);
Hyperlink: %o - console.log('Live laugh code at $o', 'http://anti-code.com');
Style formatting: %c - console.log('%c This is white text on a black background', 'color: #fff; background:#000;');

Command Line API

Command	Description
$$	Returns an array of elements that match the given CSS selector.
$0	The currently-selected object in the inspector.
$_	The previously evaluated statement
$1	The previously-selected object in the inspector.
$n(index)	Access to an array of last 5 inspected elements.
dir(object)	Prints an interactive listing of all properties of the object. This looks identical to the view that you would see in the DOM tab.
dirxml(node)	Prints the XML source tree of an HTML or XML element. This looks identical to the view that you would see in the HTML tab. You can click on any node to inspect it in the HTML tab.
clear()	Clears the console.
instspect(object[, tabName])	Inspects an object in the most suitable tab, or the tab identified by the optional argument tabName.
keys(object)	Returns an array containing the names of all properties of the object.
values(object)	Returns an array containing the values of all properties of the object.
monitorEvents(object[, types])	Turns on logging for all events dispatched to an object. The optional argument types may specify a specific family of events to log. The most commonly used values for types are "mouse" and "key". The full list of available types includes "composition", "contextmenu", "drag", "focus", "form", "key", "load", "mouse", "mutation", "paint", "scroll", "text", "ui", and "xul".
unmonitorEvents(object[, types])	Turns off logging for all events dispatched to an object.
performance
performance.timing
performance.memory
performance.navigation
profile([title])	Turns on the JavaScript profiler. The optional argument title would contain the text to be printed in the header of the profile report.
profileEnd()	Turns off the JavaScript profiler and prints its report.

Flags

Feature	Description
-disable-javascript	Disable JavaScript from command line.
-disable-images	Disable images.
-disable-java	Disable Java.
-disable-plugins	Disable plugins.
-disable-popup-blocking	Disable popup blocking.
-start-maximized	Start Chrome fullscreen

For example: "C:\Documents and Settings%username%\Local Settings\Application Data\Google\Chrome" -disable-javascript

DevTools Themes

You can tweak your skin for the DevTools using the DevTools itself. Undock it from the browser and type: Ctrl + Alt + I or ⌃ + Alt + I on Mac.

Override the classes/IDs of Devtools for your theme via chrome-devtools:devtools/devTools.css. Read about how to customize your Devtools.

Opening Google Chrome Features

                                                                       | Windows / Linux       | Mac

-------------------------------------------------------------------------- | --------------------- | ------------------- Open a new window in incognito mode | Ctrl + Shift + N | ⌘ + Shift + N Toggle bookmarks bar on and off | Ctrl + B | Shift + ⌘ + B View the History page | Ctrl + H | ⌘ + Y View the Downloads page | Ctrl + J | Shift + ⌘ + J View the Task manager | Shift + ESC | Shift + ESC Previous page in a tabs browsing history | Backspace, Alt + ← | Backspace, Alt + ← Focus the address bar with a '?' and type a search term after it to search | Ctrl + K, Ctrl + E | ⌘ + K, ⌘ + E Highlight content in the web address area | F6, Ctrl + L, Alt + D | F6, ⌘ + L, Alt + D

about:pages

Feature	Description
about:about	Displays all the chrome://chrome-urls
about:stats	Display page statistics.
about:memory	Display memory usage in a multi-process browser.
about:plugins	Display installed plug-ins.
about:histograms	Display connection times.
about:dns	Display DNS information.
about:cache	Display cached web pages.
about:network	Display a menu for various network monitoring and testing.
view-cache:stats	Display cached documents.
chrome-resource:/favicon/	Display the binary data for a PNG file.
chrome-resource:/new-tab/	A template for the empty tab page.
about:version	Display information about the browser.

Chrome URLs

chrome://chrome-urls == about:about
chrome://appcache-internals
chrome://blob-internals
chrome://bookmarks
chrome://cache
chrome://crashes
chrome://credits
chrome://dns
chrome://downloads
chrome://extensions
chrome://flags
chrome://flash
chrome://gpu-internals
chrome://histograms
chrome://history
chrome://ipc
chrome://media-internals
chrome://memory
chrome://net-internals
chrome://view-http-cache
chrome://newtab
chrome://plugins
chrome://print
chrome://quota-internals
chrome://sessions
chrome://starts
chrome://sync-internals
chrome://tcmalloc
chrome://terms
chrome://tracing
chrome://version
chrome://workers
chrome://conflicts

For Debugging

The following pages are for debugging purposes only. Because they crash or hang the renderer, they're not linked directly; you can type them into the address bar if you need them.

chrome://crash
chrome://kill
chrome://hang
chrome://shorthang
chrome://gpuclean
chrome://gpucrash
chrome://gpuhang

Devtools Links

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This work is licensed under a Creative Commons Attribution 3.0 Unported License.

Cheatsheet by Jared Williams. Notify me if you find something that is incorrect. Contribute to Cheatsheet

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