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Safari Developer Tools: How to Preserve Console Log Upon Navigation?

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When using Safari Web Inspector to read the JavaScript console output, the log is reset upon navigation i.e. going from page index.html to mail.html clears the console output. In the Chrome Developer Tools , I can easily preserve the log by right clicking on the console space and selecting Preserve Log Upon Navigation . With this option, console log output remains intact until I manually clear the output simplifying the process of debugging JavaScript that refreshes or redirects to another page. Is there a similar feature in Safari Web Inspector? Jon I don't know when this was added, but it is

Is it possible to see which srcset image a browser is using with browser developer tools

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I've been trying to see which srcset image my browser is using via the browsers developer tools, but apart from using the network tab to see which image it fetches i can't tell. Using the network tab would usually be fine, but sometimes I've noticed that it will fetch 2 image versions at different sizes, this would happen if one break point is at 600 and another at 900 and the browser was currently at 750px wide. (Ive tried this both on Chrome & FireFox, and it seems chrome will pull down both images in certain cases, but FireFox seems to only ever pull down one) The reason I want to know is I

Is it possible to select multiple elements in the Chrome Developer Tools Elements panel?

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Is it possible to select more than one element at a time in the Chrome Developer Tools Elements panel? Would be useful for deleting multiple sibling elements or quick re-ordering. I expected Command + Click or Shift + Click to do this but it didn't work. The answer is NO, it is not possible to select more than one element at a time in the Chrome Dev-Tools. You may refer to the Chrome Dev-Tools Tips and Tricks https://developer.chrome.com/devtools/docs/tips-and-tricks The Answer is NO: While you cannot select an arbitrary set of elements, you can modify settings of groups of elements indicated

Is it possible to emulate orientation in a browser?

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As the title is it possible to emulate orientation in google chrome or firefox? Meaning somehow change the browser to support media query (orientation = (landscape or portrait)) I have a emulator for mobile, but I would like to have the developer tools from chrome or firebug. Update Chrome v25 specific... To anyone, in Google Chrome Dev Tool > Overrides > Override Device Orientation you can change the alpha , beta and gamma . I think this is a place to start of from, but I have no idea how these work and can therefor not find anything.. It is also possible to Emulate CSS Media, but not

Chrome Device Mode Emulation Media Queries Not Working

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For some reason device emulation mode is not reading my media queries. It works on other sites including my own sites that I made with bootstrap, but it's not working on media queries I am using from scratch (clicking the media queries button turns the button blue but no media queries are displayed). Test file below. Is this a bug in Chrome or is there something I need to change in my file? <!DOCTYPE html>  <html> <head> <title>MQ Example 1</title> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1">

How can I reduce the waiting (ttfb) time

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I have a query which involves getting a list of user from a table in sorted order based on at what time it was created. I got the following timing diagram from the chrome developer tools. You can see that TTFB (time to first byte) is too high. I am not sure whether it is because of the SQL sort. If that is the reason then how can I reduce this time? Or is it because of the TTFB. I saw blogs which says that TTFB should be less (< 1sec). But for me it shows >1 sec. Is it because of my query or something else? I am not sure how can I reduce this time. I am using angular. Should I use angular to

Is it possible to see which srcset image a browser is using with browser developer tools

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问题 I've been trying to see which srcset image my browser is using via the browsers developer tools, but apart from using the network tab to see which image it fetches i can't tell. Using the network tab would usually be fine, but sometimes I've noticed that it will fetch 2 image versions at different sizes, this would happen if one break point is at 600 and another at 900 and the browser was currently at 750px wide. (Ive tried this both on Chrome & FireFox, and it seems chrome will pull down

How to save websocket frames in Chrome

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I am logging websocket traffic using Chrome/Developer Tools. I have no problem to view the websocket frames in network "Frames" window, but I can not save all frames (content enc. as JSON) in an external (text) file. I have already tried save as HAR and also simply used cntl A,C,V (first "page" copied only) but have so far not been very successful. I am running Linux Mint 17. Do you have hints how this can be done? Tiana Update for Chrome 63, January 2018 I managed to export them as JSON as this: detach an active inspector (if necessary) start an inspector on the inspector with ctrl-shift-j

Check whether network response is coming from server or Chrome cache

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问题 In Google Chrome, how you can check which files are served from the browser cache, and which comes from the server? 回答1: In Chrome Developer Tools switch to the Network tab and on the Size column it will either give you the size of the downloaded content or say (from disk/memory cache) . 回答2: If you can't see the size column then you may need to close this window 来源： https://stackoverflow.com/questions/13140318/check-whether-network-response-is-coming-from-server-or-chrome-cache

Chrome displays different object contents on expand

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Why does Chrome display two differing datasets depending on if you have the object view expanded? In contracted view, my object has two properties: In expanded view, my object has three properties: The object you see in the console is a snapshot of the object at a particular point in time - the time when you logged it. When you expand the object, it will evaluate the properties again. In the example below, I have created an object with two array properties. I logged it the console, and then I added a third property, c to it. Only the first two properties are showing still, even though I just

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