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Built in object There are three types of objects in JavaScript: custom objectBuilt in objectBrowser object The first two objects are the basic content of JS and belong to ECMAScript; The third browser object is unique to JS Built in objects refer to the built-in objects of JS language, which are used by developers and provide some com ...

Necessary knowledge: http://github.crmeb.net/u/defu Write the rotation page: HTML+CSS Vue cli: create project Vue Basics: template syntax, calculation attributes, listeners, rendering methods (conditional rendering, list rendering), components Deep component: component registration, interaction mode between parent and child components, and cus ...

Prototype inheritance Advantages: the same prototype object Disadvantages: the prototype object cannot be modified, which will affect all instances function Animal(){ this.type = "animal" }; function Cat(name,color){ this.name = name; this.color = color; }; Cat.prototype = new Animal ...

Five objects of BOM Window object: current browser window 1 . window object characteristics Window is the top-level object in JavaScript. All global functions and global objects are the methods of window objects For example, document, alert(), setInterval(), setTimeout(), and so on The member of the window object (attribute + method), whi ...

1. Create a new react+ts project npx create-react-app <appname> --template typescript 2. push the new local project to the remote warehouse New remote warehouse Open the local project directory and add all the existing files in the current directory to the newly created git warehouse Execute git add Submit the added documents and w ...

1. Extension operator (1) Basic usage Array to parameter sequence (comma separated) let arr = [1,2,3]; console.log(...arr); // 1 2 3 function call let arr = [1,2]; function add(x,y) { console.log(x+y); }; add(...arr); // 3 Extension operators can place expressions const arr = [ ...(x>0 ? ['a']:[]), 'b', ] If the e ...

catalogue Style sheet review 1. Three selectors for style sheets tag chooser Id selector Class selector 2. Common attributes of style 3. Style sheet Internal style sheet External style sheet Case 1: dynamically change the border style of the picture Case 2: advertising pictures scrolling with the mouse Case 3: picture magnifying g ...

title: [native javascript project] image processing with javascript 03date: 2021-11-13 11:43:56tags: native javascript projectcategories: 30 native javascript projectsintroductionThis paper uses JavaScript to update the image of a web page. For the image processing part, this page can adjust the border width, blur and border color value of the ...

event Binding event handler ele.onxxx = function(event){} <div onclick="console.log('a')"></div> var div = document.getElenmentsByTagName('div')[0]; div.onclick = function(){ this.style.backgroundColor = 'green'; } Good compatibility, but only one handler can be bound to the same event of an elem ...

git command steps Programmer A git init git add . # Add to staging area git commit -m "init app" # Submit to local warehouse # Associate to remote warehouse and alias the address git remote add origin https://gitee.com / remote warehouse address git git push origin master # Push local master branch to remote master branch git checkout -b ...