google-chrome-devtools

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 5 years ago . Not a problem, because I found out what causes it, but a huge quirk nevertheless: Apparently when you create a closure, the JavaScript engine does not save all of its scope variables. It saves only the ones that are really used by the inner function. This causes incorrect results in the debugger if

问题 I know about user agent stylesheet but I am seeing user stylesheet only on some specific sites in the Styles section of the developer tools, even though there is no Custom.css in my User Stylesheets in my Chrome Profile. 回答1: These "User stylesheet"s are added by Chrome extensions, either declared in a manifest file, or using chrome.tabs.insertCSS. Styles on the web page always take precedence over the user stylesheet, unless the rule set in the (extension's) user stylesheet has a higher

问题 I'm a big fan of source maps for javascript and SASS; however, I don't want to load source maps into production for a couple of reasons: the original source code is available and it's not a good use of bandwidth. But, sometimes, the need for debugging in production arises (we've all seen production-only bugs on the front-end). Is there a way for me to specify a source map after the fact? For example, I could have a source map available locally or behind a VPN-locked server, or even in a

问题 I've been working on a new website and practicing my JS/jQuery/AJaxy skills. Last night I wanted to take a look at how long the page was taking to render and see if there were any areas I could clean up to increase speed. While the page loads in about 200 - 300 ms every time, I'm seeing a large amount of blank space between resource loads under the network inspector. http://i.imgur.com/7ng6m.jpg Has anyone else seen this or know what I can do to minimize that time (talking about the blank

问题 I am using libcurl. I know how to send form data. I want, however, to send a "request payload" , but I have no idea how to. This is what an example of what I am trying to do, in Chrome Developer Tools: View image Can anyone please help me? 回答1: The command-line version of what you want would be something akin to: curl --header "Content-Type: application/json" --data '{"data":"blob"}' http://address.com (you'll probably want to include cookie information for authentication too) I don't know

问题 I have register a service woker using .register and can see in Application tab in dev tool. now my questionn is how to unregister this service worker. I have run this script if ('serviceWorker' in navigator) { window.addEventListener('load', function() { console.group('====SW registration======='); navigator.serviceWorker.register('/sw.js', {scope: './'}).then(function(registration) { console.log('SW registratered successfully'); console.log(registration); registration.unregister().then

问题 This question already has answers here : Restoring console.log() (8 answers) Closed last year . UPDATED: The reason the console won't log is the site runs this script: // Production mode // Disable console.log console.log = function() {}; I'm guessing there isn't a way to get the function back on the site? Prior issue: I'm running a script in my Chrome console that follows everyone on a site. There are 200 people on the page, and I want to iterate through all the follow buttons and click them

问题 I want to remove the most visited thumbnails from Chromium's “New Tab” page. After inspecting the contents of that page, I determined that the following line of JavaScript does the trick: document.getElementById("most-visited").remove(); But I still have one remaining problem: How do make it so that this line runs automatically when I open a new tab? Presumably I have to wrap it in a function and register an event handler, but I've been unable to find more precise information. EDIT: It seems

问题 I was given the following formulas to measure Time To First Byte (TTFB), TTFB to DOM Ready and Page Load. TTFB window.performance.timing.responseStart - window.performance.timing.navigationStart TTFB to DOM Ready window.performance.timing.domComplete - window.performance.timing.navigationStart Page Load window.performance.timing.loadEventStart - window.performance.timing.navigationStart Are these formulas correct? And how would I be able to check them? I've heard you can measure them in

问题 This has just became an issue today and was wondering if i've maybe touched something I shouldn't have but if you have a look at this picture here This was taken from twitch just because i had a tab open, as you can see it has the css file that the style comes from and also the line number as per usual. Now for some reason all of my web projects that I launch locally no longer have this on the dev tools and my tools look like this. This is making development pretty damn annoying as with the