google-chrome-devtools | 易学教程

Get console history

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问题 I'd like to know if there is a way in javascript to retrieve console history. What I mean by console history is what appears in the dev tools console. For instance, I'd like to print in a html page all errors, warnings, info and log that are displayed in my dev tools without opening them. Let me know if I'm not clear. 回答1: Chrome extensions had an API for that, experimental.devtools.console: chrome.experimental.devtools.console.getMessages(function(messages) { }) This API has been removed.

How to deal with the overlay Paused in debugger while automated test execution using Selenium

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问题 Everytime I try to access this website and open google-chrome-devtools I am unable to inspect any of the elements through the Inspector as the UI is having an overlay along with a message Paused in debugger . The upvoted and accepted answer of this discussion says to check the Source tab, check under the Event Listener Breakpoints panel if you've set any breakpoints under 'Mouse'. I have cross checked that none of the Sources -> EventListenerBreakpoint are set. The upvoted and accepted answer

Searching inside a JSON object in Google Chrome DevTools

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问题 I love Google Chrome's DevTools. But, when debugging I sometimes need to search for a particular property or value in a JSON request/response object (within a request/response in the "Network" tab). This can be tedious if the JSON object is large. Do the DevTools support such a search? In the example below, I was hoping that searching for "new_user" would highlight the property in the JSON object shown. UPDATE : Since this question was asked, this functionality has been added to Chrome! 回答1:

Chrome DevTools won't let me set breakpoints on certain lines

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问题 In the image above, I tried setting breakpoints on every line from line 437 to line 443. However, I cannot set breakpoints on lines 439 and 440. When the function runs, the breakpoints on lines 437, 438, 441, and 442 are ignored. Chrome breaks on line 443. This means that I cannot do some debugging before the first conditional runs. When I click on lines 439 or 440, the breakpoint appears for half a second and jumps to line 443. Is this a bug or am I missing something? How do I set a

Does the “Set next statement” feature exist in Chrome's Dev Tools or in Firebug?

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问题 IE's development tools, more specifically its JavaScript debugger, offer a "Set next statement" command, which enables you to specify which statement should be executed next. That way, you can effectively skip certain parts of functions or even (again, effectively) return from a function early. So, for this function... function test () { alert(1); alert(2); alert(3); } If we set a break-point on the first alert, and then invoke the function, we can execute the first alert (F10), and then

Chrome DevTools converts all HEX Colors to RGB

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问题 Recently, Chrome DevTools has begun converting all elements' HEX colors to their RGB values, regardless of whether that HEX color is set in CSS or through the DevTools itself. How to stop that? I am aware of the hold down Shift + click the color icon method of converting colors to other formats, but I find this inconvenient. I am wondering if anyone knows how to stop this from happening? 回答1: Open Chrome DevTools panel: Click 3 dots icon at the far right corner, select Settings , and in the

Chrome remote debugging, the device is not showing up

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I'm trying to debug a Website in Chrome on an Android device. For this I'm following the official remote debugging guide . Things are working up to 6. Make sure that Discover USB devices is enabled. , but then in point 7. Connect your Android device directly to your development machine using a USB cable. , the device is not showing up. Also on the device, I do not get the the Allow USB Debugging permission prompt as described in point 8. The device has USB Debugging enabled, and Windows recognises the device. I'm able to connect to the device using Android Studio, and then use Chrome remote

Idle time in frame rendering in Chrome DevTools

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When doing research on web render optimization, i've encountered a strange render behavior on many popular websites. Big part of frame render time is empty space with no operations. Example from Apple promo page The only thing that operates in that timeframe is a GPU. I couldn't find any cause for this behavior. What could be the reason behind this issue and how can i improve render time of such frames in my projects? This is idle time, the time when the browser is waiting on the CPU or GPU to do some processing. It is shown in the pie chart screenshot in the documentation page How to Use the

jwt: Why is my token shown in Chrome DevTools?

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问题 I have a API in Express.js that will create blog posts and add them to my database. When I make a request from my React app inside of DevTools it will show my JWT. I am worried that when my site goes live people can see my token and make a request from their site to add unwanted posts. Please tell me what is going on and how I can prevent the security error. 回答1: When you send a request with a token in the header it will look like this in the header pane in Developer Tools: I assume that's

Using the Code Coverage devtool by selenium+maven automation?

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问题 Is it possible to use the Code Coverage devtool (from upcoming Chrome release) by selenium+maven automation? E.g. like JaCoCo for java projects? I.e. I imagine approximately such scenario for our web-product: There is a test suite with several test cases. The Chrome Code Coverage collection is enabled somehow from outside Then test suite is executed (by maven): The each test case uses Selenium to run Chrome browser, executes testing scenario and close the webdriver (browser is closed). Then,