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catalogue 1, Event handling: 2, Collect form data: 1. Controlled components: 2. Uncontrolled components: 3, Higher order function & coritization of function: 1. Function coritization: Overview of coritization: Application of coritization:  2. No coritization: 1, Event handling: Specify the event handler function through t ...

catalogue Paging loadJump with referenceDate processing method start 1, Paging load What is paging loading A common scenario is to browse commodity information on Weibo and Taobao. By default, only a few pages are loaded at the beginning. Sliding down can resend the request and display more pages of information in totalWhen there is a larg ...

catalogue 1, Data type 1. Forced conversion type: 2, Operator Unary operator: Self increasing and self decreasing: Logical operators: Assignment operator: Relational operators: Equality operator: Conditional operator: Process control statement: 3, Object Function: Prototype object: Array Date: Math object:                    ...

School information system maintenance (2) Start preparation: 1. Open the Layui framework offline manual or online manual. 2. Open the bootstrap offline manual. 3. Open the SQL Sever database 1, Construction of school information data form 1.1 document introduction Open the view in the [SchoolInformation] area controller created in th ...

preface JavaScript prototype and prototype chain have always been the focus and difficulty of interview, which is not so easy to understand. text Understanding several key points of prototype makes it easier to understand the concept of prototype: 1. All reference types (arrays, objects, functions) can freely extend attributes (except null); ...

typescript advanced usage introduction As a powerful static type checking tool, TypeScript can be seen in many large and medium-sized applications and popular JS libraries. As a weakly typed language, JS will modify the type of variables without paying attention in the process of writing code, resulting in some unexpected runtime errors. Howev ...

This paper sorts out some key points, difficulties and knowledge points that are not easy to understand in JSThis article is very detailed and in-depth explanation, including learning and meeting 1. JS function 1.1 what is a function? A function (method) is a reusable block of code that is event driven or executed when it is called ...

📑 Content of this article: This article is enough for the back-end personnel of the front and back-end asynchronous request Library of Axios~ 📘 Article column: Front end knowledge (knowledge points to be mastered at the back end) 🎬 Last updated: January 29, 2022 This article is enough for the back-end personnel of the front and back-end asy ...

Summarize several modes of creating objects in JS and their advantages and disadvantages Factory mode function createPerson(name,age,job){ var obj = new Object(); obj.name = name; obj.age = age; obj.job = job; obj.sayName = function(){ console.log(this.name); }; return obj; } var person1 = createPerson('John',22,engineer); Proc ...

catalogue Constructor Static and instance members Prototype object Prototype chain Prototype object of access object Prototype object of prototype object Prototype chain this point error handling Constructor Constructors are mainly used to create objects and assign initial values to their members. //Instantiate object var p1 = new ...