JavaScript

This blog is only for the personal study of the information recorded in use, the information contained may originate from the network without indicating the source, please understand.The nextSibling and previoussibling in JavaScript and the next()

1, constructor mode　　Use the constructor to simulate "class", within which the This keyword is used to refer to an instance object.Basic syntax:function class name () {this. property name;//Public propertyvar property name;//Private property/* All

Given a string, for example: "abaasdffggghhjjkkgfddsssss3444343";1, the byte length of the stringReference code:document.write (txt.length+ "");d ocument.write ("");2. Remove the characters from the specified position, such as: 0,3,5,9,

jquery popup layer floating layer code   Press F5 to refresh to see the effect, Click the left mouse button, pop-up layer, on the rightmost click when the layer automatically moves to the left Lianjiang Ningde Fuzhou Xiamen Beijing

Ylbtech-ionic-javascript:ionic Pull-up menu (Actionsheet) 1. back to top 1. Ionic Pull-up menu (Actionsheet)The Pull-up menu (Actionsheet) lets the user select an option by going up the box that pops up.Very

New window open page, a very common effect, as for the code, the general first reaction is so written:window.open (URL);but the mainstream browser will intercept this effect (there may be too many pop-up ads in these years, if the browser does not

When it comes to websites performance was king. How long it takes-a page to load can mean the difference of millions of dollars for large ecommerce sites. In this lesson we'll use the intersectionobserver to check if an image is in the viewport to

1 Get Tag PropertiesSyntax: Element.getattribute (' property name ') returns the value of the corresponding property if NULL is not returned.// HTML//jsvar box = document.getElementById (' box '); var value = Box.getattribute (' index '// 02Set the

The composition of JavaScript Composition syntax and basic objects of Ecmscript:javascript DOM: Document Object Model describing content methods and interfaces for working with Web pages BOM: A browser's object model that describes

JavaScript Data typesString, number, Boolean, array, object, Null, Undefined123456 - A + the -[JS Master's Road first part] JavaScript on hundreds of actual combat "new" _3 JavaScript variable type

1. Undefined and null are automatically converted to false in the Boolean unary count.2. Null = = Undefined;//trueNull = = Undefined;//false2. typeof Null;//objecttypeof undefined;//undefined3. Number (null);//0Number (undefined);//nan4. Current

The increment and decrement operators apply to any value, and the difference between the predecessor and the post is the same as the difference in C languageAll values are stored in the IEEE-754 64-bit format, and the bitwise operators do not

Code:Document Effect:Native JavaScript-Implemented selection search components

JavaScript Modular Specification Detailed directory Why Modularity The benefits of modularity Page Introduction to load script problems Modular specification CommonJS implemented in node. js

The recent project to JS implementation of the data exported to Excel files, online many plug-ins to realize ~ ~ that happy, who know that the amount of data reached tens of thousands of problems: the browser not only stuck, the exported Excel file

GrammarObject. DefineProperty (obj, prop, descriptor)Parameters obj The object on which to define the property. prop The name of the property to be defined or modified.

The following is for ES5First, the variable promotion:1, Global execution Context (script): variable definition, function declaration (before execution)// undefined var a = 20;The above code is equivalent to:var // The variable is promoted to the

当前时间： JavaScript get current time-Learn notes

Gets the date of the day before the current date ? ?var MyDate = new Date( ); ?//获取昨天的日期 ? ?var yesterday = myDate.getTime()-1000*60*60*24; ? ?var date = new Date(); ? ?date.setTime(yesterday);Get current timedate.getYear+1900=date.getFullYear()date.

Yesterday a friend and I chatted to JS in the asynchronous and synchronous, and then from the asynchronous and synchronous problems to draw the other side of the function, feel very good, hereby share====Chase Dream: Chat is synchronous or