JavaScript

1 //simple rewriting of prototype objects:2 3 //a constructor person4 functionPerson () {5 6 }7 //rewrite a person's prototype8 //Assigning a person's prototype to a new object is the process we rewrite.9Person.prototype={Ten //for

Note: JavaScript is weak and loosely relative to other strongly typed languages (such as C,c++,java, which declare variable types at the same time as the variable is defined) (it is not necessary to declare the variable type at the time of

Using JavaScript's properties of object, we can easily implement an array of duplicates to be removed.The attribute of object is: key must be unique.Remove the array duplicates:1 Convert an array to an object, the value of the array as the key of

Let add = x=>x+1;//map:: (A-B), [a], [B]let Map= (function(Result,f,arr) {//Closure Store Cumulative ObjectsLet result = []; return functionMap (F,arr) {if(!Array.isarray (arr)) { return"Objects to be processed for array"; }

Previous wordsIn addition to objects, the array type of arrays may be the most common type in JavaScript. Also, arrays in JavaScript are quite different from arrays in most other languages. This article describes the array type of arrays in

Directory The default binding for this Implicit binding of this Implicit binding, a function that acts as an object property, is independent of the object In a string of object property chains, this binds to the most

Learn JavaScirpt30 's notes!... Although English is not very good, but then came to learn something.1-------> Javascirpt Drum KitThe function is this, hit the keyboard above the button, play a drum music.There are a lot of buttons in the tutorial,

　　An exercise in JavaScript about age classification

"PS Foundation Case"Figure revision. Adjust the size of the canvas, build 3 layers, put them in the canvas, fix the middle characters with the patch tool, cover the characters with the rubber stamp, then pull out the characters, put on the new blue

1. First look at a topic1 function Cat (name,age) {2 this. name=name; 3 this. age= age; 4 }5 console.log (new Cat (' Miaomiao ')); 6 // Cat {name: "Miaomiao", age:18}2. So what does this mean in this?1 function Cat (name,age) {2

The operator in JS1. Arithmetic operation (single-mesh operator)+ Plus, minus, * multiply,/divide,% remainder, + + increment operator 、--The self-decrement operator;>>>+: There are two kinds of functions, link string/addition operator. When the +

First, what is called JS?　　1, the concept of JSJS is the abbreviated form of JavaScript, and JavaScript is a client-side scripting language that is Object-and event-driven and has relative security. In web development, JS occupies a pivotal position,

The This and the function in JavaScript are closely related, so today I'll tell you in detail: this in the JavaScript functionWhen it comes to this, a lot of the abstract concepts that make people dizzy are running out,Here I'll just say the core

1, as a method invocation of an object, this value is the current object var obj={ name:"Xiao", getName () { this. Name //xiao } } Obj.getname ();2, as a normal function call this point to window, when a function

This article is taken from the Nanyi Teacher's study note, hereby declaresClosures (closure) are a difficult and unique feature of the JavaScript language, and many advanced applications rely on closures.Here is my study note, which should be useful

In JavaScript, a variable or function is used before declaring a variable or function, which creates an error. These will appear in many JS written questions.First look at the following question:1(function( ) {2 varx =foo ();3 varFoo

Dynamic adaptive of up and down div height-alternative processing scheme and div adaptive During this time, I encountered a seemingly tricky problem at work.Problem description: The query report page consists of the upper part and lower parts. The

Learn css basics in two days (2) and css basics in two days After receiving the previous blog, two important things in css were not mentioned, namely the floating and positioning of elements. Part 3: Floating and clearing of Elements The previous

Css controls whether a single or multiple lines of text overflow are shown as ellipsis (...) and css ellipsis (...). P: first-child {background-color: pink; width: 150px; line-height: 28px; font-size: 20px; Overflow: hidden; Text-overflow:

ES6 modular import and export usage method summary, es6export Before ES6, The js module loading scheme has emerged. The most important is the CommonJS and AMD specifications. Commonjs is mainly used on servers for Synchronous loading, such as nodejs.