when loading a page, browsers sometimes wait for 1-2s, but after loading successfully, re-reload the page, then < 1s can be loaded. What does the browser do at this time ...
as mentioned, are DOM Tree and CSSOM Tree carried out at the same time or successively ...
in Firefox mobile phone mode, set scale: according to dpr <meta name="viewport" content="width=device-width, initial-scale=0.5, maximum-scale=0.5, minimum-scale=0.5, user-scalable=no, minimal-ui"> this is how it appears in Fi...
when a normal http request is made, the default form is generally formatted like this FormData Field 1key= Field 1Value Field 2key= Field 2Value the data format of the array type may be FormData Array name 0x0 element field 1Value Array na...
< H1 > error occurred when compiling ES6 with babel without using nodejs < H1 > < H2 > scene < H2 > We currently use ES6 syntax in traditional projects (not the modern front end packaged by nodejs ). As a result, colleagues browsers can t browse...
Today, when I was reading an article on the Internet, I saw a code like this: element.style.backgroundColor = "blue"; element.style.color = "red"; element.style.fontSize = "12em"; class .newStyle { background-c...
background I know that http 2 has a multiplexing mechanism in concurrency, and only one tcp is temporarily used no matter how many http requests there are. So there will be no request blocking. the following figure shows multiple http requests in ...
< H1 > using MutationObserver to listen for dom changes does not take effect < H1 > < H2 > Environment < H2 > Windows 10 Chrome 71 < H2 > question < H2 > as mentioned, we want to listen for changes in the DOM tree of the page the code is a...
< H1 > using MutationObserver to listen for dom changes does not take effect < H1 > < H2 > Environment < H2 > Windows 10 Chrome 71 < H2 > question < H2 > as mentioned, we want to listen for changes in the DOM tree of the page the code is a...
< H1 > using MutationObserver to listen for dom changes does not take effect < H1 > < H2 > Environment < H2 > Windows 10 Chrome 71 < H2 > question < H2 > as mentioned, we want to listen for changes in the DOM tree of the page the code is a...
I thought of two ways: PHP code is converted directly to JS code PHP engine for front-end browsers is it possible to achieve these two methods, and what is the difficulty? ...
as shown in the figure above, I expect a strong cache all the time. If the strong cache fails, reset the strong cache and get the cache from memory instead of returning 304, which results in the overhead of interacting with the server. I d like to a...
< H1 > there is a requirement that it is inefficient to copy and paste to the details page all the time. < H1 > I have an idea. Write an extension of Chrome so that when it comes to a specific page, it parses a specific Dom node. However, because the ...
D,C ? ?...
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how to remove the following unsafe connections and solve them in the code instead of setting in the browser ...
1. Write a demo post that can be played in web, but if you open it directly in a browser, you can t 2. <html> <head> <title>< title> <meta charset="utf-8"> <link href="http: vjs.zencdn....
as shown in the figure, when Wechat receives a new message, the desktop taskbar icon will brighten and flicker. How can the browser also brighten and flicker when minimized? ...
question 1: cookie can control path&domain to control its scope, so will different protocols or ports now have access to cookie? < del > question 2: one of the drawbacks of cookie is that all requests come with accessible cookie, but we have observed ...
this is a problem encountered in development. the former is debugged in Chrome68 version and can be displayed normally after update. the latter is an old version of Sogou browser. After checking, it shows the same style as Chromium 49 version . The...