JavaScript

We often use code such as Javascript:void (0), so what does javascript:void (0) mean in JavaScript?The key in Javascript:void (0) is the Void keyword, which is a very important keyword in JavaScript, which specifies that an expression is evaluated

Using the JavaScript call API returns a picture of the binary data format, how does it appear on the Web page?First, the direct use of XMLHttpRequest, rather than Ajax, has been explained in the previous article. and set the Responsetype to

Abstract Equality Comparison algorithmThe comparison operation x==y , where x and is the y value, is generated true or false . This comparison is done as follows: IfType(x)AndType(y)The same, the If Type(x) Undefined so, return true .

1. If the Window object is a regular HTML page,TOPis self var top = document.getElementById (' top '); Top.innerhtml//undefined 2,ev.stoppropagation ();//Block Event bubblingfunction (EV) { // organization event bubbling function() { for (var

First, Introduction The Document Object model, or DOM, is the standard programming interface recommended by the Organization for the processing of extensible flag languages. DOM Programming: DOM is the standard for how to get, modify, add,

First, the functions in JavaScriptBefore you know this point, figure out how the execution environment is created when the function executes, so that you can understand the this point in JavaScript more clearly.function fn (x,y,name) { var str1=x;

JS Gets the current timestamp method-javascript Gets the current millisecond timestamp in the following three ways:var timestamp =date.parse (New Date ()); Results: 1280977330000//Not recommended; Milliseconds changed to 000 display.var timestamp = (

The first part of the series focuses on how to "encapsulate" data and methods, and how to generate instances from prototype objects.Today's introduction is about five ways to "inherit" between objects.For example, there is now a constructor for an

650) this.width=650; "src=" http://p3.pstatp.com/large/1f810005645e14a4b803 "alt=" a1-on the prototype in JavaScript (ii) "Style=" border-style:none;margin:10px auto; "/>What is a prototype? To understand this problem, we have to know the

First section:onmouseover // events, mouse move in;onmouseout // events, mouse out;= value; // Element Property operation mode One, through the point (.) way, do not assign value to read;Section II:Obj.[arr] = value; // element attribute

In Java and C #, you can simply understand that class is a mold, and the object is a batch of mooncakes that are pressed out of the mold. What kind of pressure, you have to be a kind of, can not move, move on the bad.And in JavaScript, without a

In practical programming, a part of the data needs to be converted uniformly into a data type for processing, including converting to string types, converting to numbers, and system automatic data type conversions.1. Converting to a

Write a few things to get started with Vue, write some other relaxation today and simply talk about the objects in JavaScript.In the object-oriented language, there are classes of the concept, of course, ES6 in the beginning of JavaScript also has

Array1. definitionA) there is only one-dimensional array in JavaScript, but other ways to implement multidimensional arrays b) do not need to specify an array type , directly create an array using the new Array ()c) The data type of the same

JavaScript basic Data typeThere are 6 kinds of data types in javascript: Null, Undefined, Boolean, String, number, Object. Where object is a complex data type.Basic data type: Null, Undefined, Boolean, String, number.Reference data type: Object,

Frontend _ basic, Web: It consists of three parts: 1. HTML; 2. CSS; 3. JavaScript. 1. HTML: used to construct the structure and content of a webpage; 2. CSS: Used to make up and beautify webpages; 3. JavaScript: Used to Display Dynamic Data and

How to dynamically set the port in Express in node, nodeexpress If you can dynamically set the port, debugging will be more convenient. You do not need to change the code because the default port is occupied. The Code is as follows. In fact, there

Use the bootstraptable plug-in to query, paging, and sort table records. In business system development, query, paging, and sorting of table records are very common. In Web development, many powerful plug-ins can be used to meet requirements, this

Deep understanding of the differences between block-level elements and intra-row elements in CSS (personal error points), css error-prone Difference 1: Block-level: a block-level element occupies only one row. By default, the width of the parent

Vue component $ children, $ refs, $ parent Usage Details, vuerefs This article describes how to use the vue component $ children, $ refs, and $ parent. I will share it with you and take a note. If the project is large and there are many components,