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1, Life cycle of Vue Official documents: https://cn.vuejs.org/v2/guide/instance.html# Life cycle diagram    Vue instances have a complete life cycle, which is a series of processes from the beginning, such as creating initial platform data, compiling templates, mounting DOM, rendering update rendering, unloading and so on. We cal ...

concept State mode: allows an object to change its behavior when its internal state changes. The object seems to modify its class. Start with the electric light Requirements: An electric lamp that realizes a switching function Code implementation: class Light { constructor() { this.state = 'off' // Default light off ...

I Pass parent component to child component Parent components communicate with child components through props attribute Data is one-way flow parent - > child (if props data is modified in the child component, it is invalid, and there will be a red warning) 1. Parent component Vue code is as follows: Father to son Bind an attribu ...

Before learning html dom, you must have HTML，CSS and Javascript Knowledge reserve. 1. Interpret DOM, HTML DOM, and XML DOM 1. What is DOM? Here DOM, the full name is short for Document Object Model. DOM is the standard of the W3C (World Wide Web Consortium). DOM defines standards for accessing HTML and XML documents. 2. What is an XML ...

This article will summarize and sort out the front-end technology stack currently used by the author, which is very basic. If you know something about the basic JS/HTML/CSS framework, but you don't know or feel confused about the current popular web framework, more directly the technology that can be employed, then I believe you will gain enoug ...

I Pass parent component to child component Parent components communicate with child components through props attribute Data is one-way flow parent - > child (if props data is modified in the child component, it is invalid, and there will be a red warning) 1. Parent component Vue code is as follows: Father to son Bind an attribu ...

Recently, we need to display the deep learning network structure diagram on the front end in a more intuitive form. For data transmission, we plan to use the form of data path flow, because I haven't learned much about the front end. I feel that there will be many problems after I write js and css code. The beauty of the front end display an ...

Modularization is the first mock exam in the most important front end development paradigm. Modularity is only thinking. Modular evolution process Stage1 file division method Pollution global scopeNaming conflict problemUnable to manage module dependenciesEarly modularity depended entirely on conventions Stage2 namespace mode Each module e ...

Ajax Ajax concepts Ajax(Asynchronous JavaScript and XML): asynchronous JavaScript and XML effect Using Ajax, the page can be updated without refresh, the page can be submitted asynchronously, and the user experience can be improved essence Use a special object (XMLHttpRequest) provided by the browser to send a request to the server asynch ...

Ajax A way of calling background interface on Web page JQuery provides the corresponding usage, $ ajax({content}); Add the jQuery package first. The content part is a JS object. $.ajax({ type:'get', //Request type: get - > call doget(), post - > call dopost(); data:req, //The data sent is req; url:'queryAll', //Interfa ...