google-chrome-devtools

问题 Can devtools show a diff between the original file and current modifications? or a list of modified selectors and their new values, in the case of CSS? I'm aware of: Local Modifications - history of every change, but not original..current Map to workspace - save modified files to their source Source Maps - see preprocessed sources (SCSS) Workflow (SCSS) Compose changes with Elements pane using CSS (can't edit SCSS rules directly) Remember changes or cross-reference in two windows Add to SCSS,

问题 I'm trying to use the Chrome Experimental Devtools API. I've tried running Chrome with: --enable-experimental-extension-apis as suggested here: http://developer.chrome.com/extensions/experimental.html and enabled the "Experimental Extension APIs" in the flags settings. When I open the Console in Chrome (or Canary), I get the following: chrome.devtools: undefined chrome.experimental: undefined I'm running Chrome 21.0.1180.77 beta-m. I've also tried Canary. What am I missing? 回答1: As explained

问题 I am confuse about this symbol (<-) in Chrome DevTools It's return value or console value? When I run this while loop var i = 0; while (i < 5) { console.log(i); i++; } the console log spits out 4 twice, the last 4 have a (<-) in a front, what's meaning? 回答1: This has to do with the nature of the eval function. Note that: var i = 0, j = while(i < 5) { i++; }; Produces a compile error. However, var i = 0, j = eval('while(i < 5) { i++; }'); Assigns the value 4 to j . Why is this? Quoting from

问题 I am working on a project that wants me to get information from Google Chrome's Developer tools. More specifically, when I open up the developer tools on my target website, under the resources tab a folder is being populated called other. This folder is populating a list of URLs. I am curious if it is possible to somehow access or get the URLs that are being populated via any coding language (preferably python,/javascript/ajax/java). Any input, advice, suggestions as to how to go about

问题 I have a Chrome extension that appears to have a memory leak: Chrome's task manager reports a gradually increasing memory footprint. But when I use the dev tools profiler to take heap snapshots and compare them, I see net negative size deltas. So, why don't these two tools agree? Is Task Manager measuring something in addition to or different from heap? I see mentions of "javascript heap" vs "native memory" -- how do these affect what these tools report? And what is meant by native memory in

问题 I followed the instructions provided by Gogle to setup sourcemaps: https://developers.google.com/chrome-developer-tools/docs/css-preprocessors The sourcemaps are working, and I can see the .scss source link in the "Elements tab". But I have two issues: 1 - When I edit the CSS properties in the "Elements tab" the link to .scss breaks up and DevTools shows link to the compiled .css file. 2 - When I ctrl-click on the CSS property in the "Elements" tab, the "Sources" tab opens successfully to

问题 I'm trying to understand a few things about the timeline in the Chrome Dev Tools. From the documentation, I gather that the grey and clear bars are "Activity that was not instrumented by DevTools" and "Idle time between display refresh cycles", respectively. I have an app that renders updates each frame ( requestAnimationFrame() ) and has a typical timeline profile pictured below: Unfortunately, to me the documentation does not make it clear how to evaluate the grey and white space in my

问题 I'm seeing error messages about a file, min.map , being not found: GET jQuery's jquery-1.10.2.min.map is triggering a 404 (Not Found) Screenshot Where is this coming from? 回答1: If Chrome DevTools is reporting a 404 for a .map file (maybe jquery-1.10.2.min.map , jquery.min.map or jquery-2.0.3.min.map , but can happen with anything) first thing to know is this is only requested when using the DevTools. Your users will not be hitting this 404. Now you can fix this or disable the sourcemap

问题 When I'm working with developing a website, I often would like to see how a specific feature would look on a website. So I go to the chrome developer tools and often run some javascript scripts. I often find the issue that some scripts can not run because of the Content Security Policy (CSP), which I completely understand for purposes of protecting against cross site scripting. QUESTION: Since I am testing features with the developers console on a page that is loaded for me on my browser

问题 Even though Chrome is caching static files (JS, images, etc.,) in the Network tab, these files are taking sometime as shown in the below picture. Where as many of the cached files are loading in just 0ms. Can someone please tell me even though the files are loading from cache, why are they loading in >0ms? 回答1: At first glance, it does look quite strange to see Chrome spending time downloading resources even though they are coming from the cache. It's not the time spent downloading from a web