google-chrome-devtools

问题 I have developed chrome extension , I have added , chrome.browserAction.onClicked.addListener which will start the script once clicked on , the script in turn will add a div at the bottom of the web page on the tab the browser action is clicked , All I have to do is , I need to add a close link which will stop the content script and close the div at the bottom , I have tried windows.close() , self.close() but nothing seems to work ,I would atleast want it to work in a way that 2nd time some

问题 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? 回答1: This is idle time, the time when the browser is waiting on the CPU or

问题 I'm building an Angular 2.0 CLI app - and it just happens that i have lots and lot of CSS tweaks to make. I can of course modify something inside Webstorm, press Ctrl+S and than wait 3-7 seconds for the webpack build process to detect those changes and update the view. But I feel like I'm wasting a lot of time for little changes like: border-radius form 5px to 3px - it's killing me.. If instead i change stuff inside Chrome Developer Tools - it updates instantly - no time wasted.. Instant

问题 How can I use the Chrome-devtool's console to test if my javascript works? I've located the xpath and converted it to an css locator. Basically it is a button that turns the color from grey to blye. Here is my snippet code: browser.execute_script("$('button.nominate').trigger('tap');") On the console, I tried something like: $('button.nominate').trigger('tap') The result shown below: [] I thought it would tap the button 回答1: I suppose you are doing some kind of functional testing on your

问题 I'm trying to use Google Chrome workspaces with CSS persistent editing in an Angular 6/7 CLI project. When adding "extractCSS:true" in angular.json configuration and using "--source-map=true" flag I can see the CSS file in the "sources" and "elements" tabs in Chrome, and I can map it to the online CSS file, but when changing the style in the "elements" panel the change is not persistent and is not saved to the file. Is it possible to edit the component CSS files from within Chrome dev tools

问题 During a page's "dormant" state, I can inspect the values of any tag by entering its id in Chrome Dev Tools' console tab, like so, e.g. for a tag with the name "BeginDate": 0) Enter "BeginDate" in the console tab 1) Mash the key ...and I see the whole shebang: <input alt="date-us" data-val="true" data-val-regex="End Date must be in the format &quot;m/d/yyyy&quot;" data-val-regex-pattern="[0-9]*[0-9]/[0-9]*[0-9]/[0-9]{4}" data-val-required="End Date must be in the format &quot;m/d/yyyy&quot;"

问题 I have a web application which dynamically adds javascript files based on what the user chooses as options using ajax in real time to avoid refreshing the screen. I am now trying to debug these dynamically added javascript files and have tried both Google Chrome's developer tools and Firebug's pluggin for Firefox, and have noticed that the dynamically added javascript "files" do not appear, so I can't select them to add breakpoints etc. So, is there a solution for this, i.e. debugging

问题 Is it possible to search with regular expressions within Google Chrome's developer console? I know how to search for text within the console ( Ctrl + F ), but can't see any way to enable regular expressions. Do there e.g. exist extensions to enable this, if not supported by Chrome itself? Update I have created a feature request for regular expression support in developer console search, since there appears to be no current support for it. 回答1: Ctrl + F search with regular expressions does not

问题 I previously used the react-addons-perf package to measure various things like wasted renders via Perf.printWasted() . Unfortunately, this package was retired in React 16 in favor of Chrome's Performance tab which doesn't have equivalent tools. I'm aware of why-did-you-update, but this isn't exactly the same. Is there any way in React 16 to measure wasted renders? 回答1: Yes, react-addons-perf was retired, and you will not get them for React 16 and further (into Fiber) as stated by Dan Abramov

问题 One of the most annoying things I encounter on a daily basis is constantly having to reset the zoom of the chrome device emulator. For whatever reason, each time I change the device selection, the zoom changes from 100% to the "Fit to Window" size, which is always less than 100% and renders the page and text so tiny its unusable. I've seen the "Edit" menu under the device listing, and this is where I would expect to find the setting to always default the zoom to 100%, however, I'm not seeing