google-chrome-devtools

Google Chrome default console context

由 萝らか妹 提交于 2019-11-27 15:03:01
Lately when opening the Google Chrome developer console, the context has been wrong. I load a page, press Ctrl + Shift + J and get this: http://i.imgur.com/2eTJgD0.png It changes extensions sometimes but it should be 'top'. I can change the context manually each time but this is getting kind of annoying to do. This issue was reported and fixed on the Chromium issue tracker. The revision #396058 has not made it into Chrome stable yet, but you can see that it is fixed in Chrome Canary. It can take 10 weeks for the change to reach the stable version of Chrome, and it has been about 1 month so far

How to get the average FPS in chrome devtools

由 落爺英雄遲暮 提交于 2019-11-27 15:00:39
问题 I want to retrieve the average fps of the measured performance recording. So far I'm only able to get the duration and fps per frame by either hovering over the frame like this: or by selecting the frame: To get the average fps of all frames, I would have to sum and count them one by one by hand, which is quite inconvenient. Firefox devtools for example displays the average fps at the top right of the panel. 回答1: You can use devtools-for-devtools. Switch devtools to detached window mode

How do I search through scope variables in Google Chrome Developer Tools?

由 佐手、 提交于 2019-11-27 14:39:21
问题 I set a breakpoint in a javascript function with Google Chrome Developer Tools. I am looking for a variable in the scope variables of the function with the value "Fred." How do I search for this value amongst the variables within the scope of the function? 回答1: You can set a breakpoint within Chrome DevTools on a particular line, that's within the scope/context of said variable. When browser execution reaches the breakpoint, you'll have access to all variable/functions within its, and the

Measure the render time of a JSF view after a server request

由 扶醉桌前 提交于 2019-11-27 14:28:06
I would like to measure the rendering time of a JSF application. Because of out of my power reasons, the application can't be populated with logs. Therefore, my question would be, is there any way in which I can measure the rendering time of the application after doing a certain action that includes a back-end(server) call using any browser? So far,after using the Chrome Developer Tools,I spotted the following. On the Network tab, each request has the "Time" displayed. In addition, after selecting a certain entry, on the "Timing" tab, a more detailed visualization it's displayed. Now, I can

Why First Paint is happening before DOMContentLoaded

由 回眸只為那壹抹淺笑 提交于 2019-11-27 13:55:33
问题 I'm diving into performance tools that are shipped with Google Chrome as I'm trying to get my head around performance improvements techniques. I'm playing around with Timeline tab, and I found that on my page First Paint event is happening before DOMContentLoaded event. I read a few articles and reportedly the first moment when browser can start displaying stuff to the user must be after DOMContentLoaded . Could somebody please explain it this is true? 回答1: DOMContentLoaded means that the

Backbone.js Memory Management, Rising DOM Node Count

由 非 Y 不嫁゛ 提交于 2019-11-27 13:05:11
问题 Situation : I'm working on a pretty decently complex single page Backbone app that could potentially be running for 8-12+ hours straight. Because of this, there's a need to ensure that the application won't leak and have a reputation for crashing after X hours or slow down dramatically. The Application : The app is built on Backbone (mv*), Zepto (similar to jquery), Curl (amd loader) & Mustache (templating). Problem : I've just conquered the event listeners. The garbage collector seems to be

Resource interpreted as Document but transferred with MIME type application/json warning in Chrome Developer Tools

由 天涯浪子 提交于 2019-11-27 12:55:28
问题 I have the following snippet, which uses the jQuery Form plugin to post a form to the server (in ajax). var options = { dataType: "json", success: function(data) { alert("success"); } }; $form.ajaxSubmit(options); The form: <form enctype="multipart/form-data" id="name_change_form" method="post" action="/my_account/"> <div style='display:none'><input type='hidden' name='csrfmiddlewaretoken' value='6c9b552aaba88b8442077e2957e69303' /></div> <table> <tr> <td> <label for="id_first_name">First

How to debug chrome devtools panel extension?

由 ↘锁芯ラ 提交于 2019-11-27 12:37:32
I am trying to write Chrome DevTools extension, but I am having some troubles to debug it. How can I inspect my panel html and debug it's javascript? If you detach the Dev Tools (icon next to x in the top right corner) in a separate window, and press Ctrl + Shift + I while Dev Tools window is focused, you will invoke the Dev Tools for the Dev Tools window. As far as I am aware, it's not possible for a docked configuration. To me it works with detaching the DevTools and hit CTRL+SHIFT+i (Windows). 来源： https://stackoverflow.com/questions/27661243/how-to-debug-chrome-devtools-panel-extension

Can I tell the Chrome script debugger to ignore jquery.js?

由 妖精的绣舞 提交于 2019-11-27 12:36:42
问题 Is there a way to tell the Chrome debugger (or maybe Firebug?) to not break within certain files? To assume they're not broken, essentially? This seems like something they might build in. 回答1: Blackboxing JS files is now possible in Firefox https://developer.mozilla.org/en-US/docs/Tools/Debugger And in Chrome Canary using Experimental Dev tools. http://www.divshot.com/blog/tips-and-tricks/ignoring-library-code-while-debugging-in-chrome/ Update . In Chrome v. 75 there is a separabe tab for

Where is the new Emulation tab in Chromes console drawer?

由 你。 提交于 2019-11-27 12:23:39
问题 I frequently use the overrides tab in Chrome Developer tools to emulate other device such IPhone and IPad, but after upgrading to last version (32.0.1700.76 m) everything in the overrides tab is gone and replaced by a checkbox saying "Show 'Emulation' view in console drawer". Checking this checkbox does not enable a 'Emulation' view in the Console drawer. The "Show Console" button seems to be disabled. 回答1: See here for more information. Before starting open the dev tools console (on a Mac
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