JavaScript

What is a DOM event?events are classified as DOM 0-level events and Dom 2-level events, and DOM2-level events are also known as event snooping. The disadvantage of DOM level 0 events is that if the event is the same, the event of the latter

JavaScript statements (if, for, in, Do...while, while, break, continue, switch)One, if statementif(conditionstatement1 else Statement21. If ... else .....if (2>1) { alter ("2 greater than 1") } else { alert ("2 less than 1") }　　2. If....else If .

Original: http://www.cnblogs.com/xie-zhan/p/6020954.htmlWhen JavaScript implements inheritance, it needs to copy objects, and in order to affect the original data without affecting the copied data, that is, when there is a sharing relationship, we

Get window scroll bar height:/*********************获取窗口滚动条高度******************/function getScrollTop(){var scrollTop=0;if(document.documentElement&&document.documentElement.scrollTop){ scrollTop=document.documentElement.scrollTop;}else

*{padding:0; Margin:0; }. Wrap {width:300px; margin:100px Auto0; } Table {Border-Collapse:collapse; Border-spacing:0; border:1px solid #c0c0c0; width:300px; } th, td {Border:1px solid #d0d0d0; Color: #404060; padding:10px; } th {

Two native methods of obtaining parameters via URLs (typically provided using a framework):Method One (recommended):Urlinfo=window.location.href; Gets the URL of the current pagelen=urlinfo.length;//gets the length of the URLOffset=urlinfo.indexof ("

In general, when we run the code, the error in the console will display your wrong number of lines, find that line, find your corresponding error 1, XXX is not defined XXX no definition 2, XXX is not a function xxx isn't a functional xxx at this

One of HTML5 's most welcome new features is the canvas element, which is responsible for setting an area in the page and then using JavaScript to make a dynamic drawing. Basic usage 　　　id= "Drawing" widht= "Max" height= " > a

1.JavaScript reserved KeywordsIn JavaScript, some identifiers are reserved keywords and cannot be used as variable names or function names.1.1 JavaScript StandardAll modern browsers fully support ECMAScript 3 (the third edition of Es3,javascript,

Part of this article is transferred from https://www.cnblogs.com/CBDoctor/p/3745246.html1. Variable Promotion1Console.log (global);//undefined2 varGlobal = ' Global ';3Console.log (global);//Global4 5 functionfn () {6Console.log (a);//undefined7 　　

ObjectiveA namespace can be considered a logical grouping of code under a unique identifier. Why does the concept of namespaces appear? Because the number of words available is too small, and different people write programs can not all variables are

Summary of key VUE issues and summary of VUE issues 1. Three Mount methods for components Automatic mounting var app3 = new Vue({ el: '#app-3', data: { seen: true }}) Manual mounting // Delayed on-demand mounting {{ name }} Mount var obj = {name:

Vuex implements counter and list display, and vuex implements Counter Display This tutorial will show two examples of counters and lists to illustrate the simple usage of Vuex. Github The process from installation to starting the initial Page is

Introduction to Angular change detection methods and introduction to angular Change Detection (Change Detection) is one of the most important features in Angular 2. When the data in the component changes, Angular 2 can detect the data changes and

Use of Vue2.0 series filters and vue2.0 series Filters Vue2.0 has deprecated the filter and requires a custom filter for common text formatting. It feels super easy to use !! The filter can be used in two places: Double curly brackets interpolation

Vue. js is used as the select drop-down list instance (ul-li label is similar to select label), vue. jsul-li Objective: To use the ul-li label and Vue. js knowledge to create a drop-down list that imitates the select label. Knowledge

Axios global request parameter settings, request and return interceptor methods, axios global Application scenarios: 1. parameters included in each request, such as tokens and timestamps. 2. Determine the returned status, such as whether the

JS uses FileReader to implement the local preview function before uploading images, Introduction During Image Upload and preview, if there are no special requirements, you can directly upload the image to the background, and then get the URL and

When Vue. js is used to display data, the original code is flashed on the page, and vue. js is flashed. I started to learn how to use Vue. js today, but I found a problem during the learning process, that is, when loading data on the page, the

Baidu map API-javascript-web map application, Html code Jianhe Plastic Materials Co., Ltd. Contact person: mr. Hu Email: hudb@pvc123.com contact address: QQ online consulting / div>   Css