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1. Parameter transfer through function Take the text box as an example, the access methods of other components are roughly the same. For example: <input type="text" id="mytext"/> <button onclick="load(mytext.value)"></button> 2. Native js First, let's talk about how native JS can get elements in DOM. By unique id <di ...

1, What is cross domain? In the front-end field, cross domain refers to that the browser allows to send cross domain requests to the server, so as to overcome the limitation that Ajax can only be used in the same source. What is homology strategy? Homology policy is an agreement. The browser was introduced by Netscape in 1995. It is the most ...

Test Hooks' proficiencyWhy can't Hooks be used in for loops and if statementsReact.memo,React.useCallback,React. The role and comparison of usememoThe value in useState is an object. If you change the value in the object, will the component render? If you use react It's wrapped in memo()What is the (Implementation) principle of Hooks?What is th ...

(1) : method of comparing objects There are a lot of concepts. Just have a look: 1: ReferenceEquals: Object.ReferenceEquals(left, right) static method: it can be seen from the name that it is used to compare whether they are the same reference. We should never override this method. It always returns false for the comparison of value type ob ...

Author: HelloGitHub- Xiaoxia (first official account of HelloGitHub) As a developer who relies on code as a "livelihood", whether the bug is written well or not, the editor is really important! Then the name Visual Studio Code will be familiar to you. As an old and powerful editor, its excellence is as follows: First of all, i ...

preface 📝 👉 unstated-next State management based on React mental model (hook+context). 👈 [the external chain image transfer fails. The source station may have an anti-theft chain mechanism. It is recommended to save the image and upload it directly (IMG uhrmuffj-1618884145855)( https://raw.githubusercontent.com/blazer233/unstated-next ...

Requirements: Click the link in Chrome browser, open IE browser, jump to the specified page and pass the parameters Solution: Some applications can start and perform operations by clicking the URL link (e.g. Xunlei). How does this happen? It mainly registers the URL Protocol by modifying the registry. Phase 1: click the link to op ...

Encapsulation method (Promise encapsulates ajax) Here, we use Promise of ES6 to encapsulate an ajax request. We can do some public operations, such as intercepting token and processing login verification let request = ({type, url, data, headers, dataType, params, contentType, isBody, async}) => {//ES6 syntax let requestObj = { ...

1. Course objectives Implement vue Simulate a minimum version of Vue Common questions of response principle in interview Learn from others' excellent experience and transform it into your own experience Whether the rule is a response to an instance of Vue Reassign the attribute to an object. Is it responsive Blood deficiency vue Prepare the ...

vue+nodejs+mongodb deployment project to alicloud This is my final design. I wanted to learn about project deployment. After two days, I finally succeeded. Ha ha, the reference link of this deployment process is as follows. It's well written. I also took notes and introduced the process in more detail. Just follow the steps. I'm also the first ...