browser

问题 Once I've executed window.stop() , how can I resume default actions? I need to make toggle/switch function, that once fired will run window.stop() , and with second run will recover window actions disabled by window.stop() . 回答1: I misunderstood before how window.stop() works. I was wrong, there are no any "direct inbuilt" javascript method to reload ONLY THESE ELEMENTS stopped by window.stop(), so by this meaning it's impossible. However, if it's needed, we can: loop through each element on

问题 Once I've executed window.stop() , how can I resume default actions? I need to make toggle/switch function, that once fired will run window.stop() , and with second run will recover window actions disabled by window.stop() . 回答1: I misunderstood before how window.stop() works. I was wrong, there are no any "direct inbuilt" javascript method to reload ONLY THESE ELEMENTS stopped by window.stop(), so by this meaning it's impossible. However, if it's needed, we can: loop through each element on

问题 We are going to start working on TeX to MathML translator soon. So, I am wondering which browsers (and starting from what version) do officially support MathML? Thanks 回答1: There is a big table of browser support on Wikipedia. At the time of writing, it seems only Firefox supports MathML natively of the big players . 回答2: Almost none , only Firefox and Safari can handle MathML. See https://caniuse.com/mathml But there is a workaround available that replaces the unsupported MathML formulas by

问题 We are going to start working on TeX to MathML translator soon. So, I am wondering which browsers (and starting from what version) do officially support MathML? Thanks 回答1: There is a big table of browser support on Wikipedia. At the time of writing, it seems only Firefox supports MathML natively of the big players . 回答2: Almost none , only Firefox and Safari can handle MathML. See https://caniuse.com/mathml But there is a workaround available that replaces the unsupported MathML formulas by

问题 I have some image resources that are immutable and can be cached forever. Chrome seems to respect my response headers, and does not re-validate the resources: Here's an example of one of these resources in Chrome. As you can see, I include cache-control: public, max-age , expires , etag and last-modified and the resource is served from "memory cache": Firefox, however, does not respect these headers and re-validates the resources on every load! My server is hit with a request for each profile

问题 Suppose I have a module: // module.js export default function greet() { console.info( 'hello' ); } If the module is loaded via: <script type=module> import greet from './module.js'; ... </script> then I want the calling code to be able to invoke greet() on its own, without it being called automatically (the normal scenario). However, if the module is loaded via: <script type=module src="./module.js"></script> then I want the module to invoke greet() immediately (as a side-effect of being

问题 Let's start with an example: You visit youtube.com, which uses Media Source Extension (MSE) with HTML5 for certain devices. MSE injects the <video> tag with a blob URL. It looks something like this: blob:https://www.youtube.com/blahblahblah" Throughout streaming the entire video, your browser makes multiple network calls to download the various chunks of video, and appends them to the MSE's SourceBuffer Therefore, the Meda Source object as a whole is updated throughout the video stream

问题 Let's say I have this function: function test () { // statements 1 statement_X; // statements 2 } I'm stepping trough the statements with the browser's dev tools. Now, when I'm paused at "statement_X", I would like to terminate the function execution (I don't want the "statements 2" part of the function to be executed), as if the "statement_X" is immediately followed by a return; statement. I know that Chrome has inline script editing, so I could manually add the return statement after the

问题 Suppose the page below is loaded from https://127.0.100.1 . The page makes an XMLHttpRequest to http://127.0.100.2 . This seems like mixed content : The page is loaded over a secure connection and a resource is loaded over an insecure connection. Mixed content should be blocked by the browser. Yet, the page below works just fine.* Why does it work: Why isn't the request blocked? Update: Going beyond the accepted answer, browsers can be configured to block mixed content for such addresses. *

问题 Suppose the page below is loaded from https://127.0.100.1 . The page makes an XMLHttpRequest to http://127.0.100.2 . This seems like mixed content : The page is loaded over a secure connection and a resource is loaded over an insecure connection. Mixed content should be blocked by the browser. Yet, the page below works just fine.* Why does it work: Why isn't the request blocked? Update: Going beyond the accepted answer, browsers can be configured to block mixed content for such addresses. *