JavaScript

Determine if the date type data function IsDate (dateval) { var a1=dateval.replace (/-/g, "/"); var dd=new Date (A1); var ss=dd.getyear (); if (isNaN (ss)) return false; Else return true; } Keep the decimal point precision, found that some versions

History object for JavaScript The history object is the property of the Window object, and the History object has no events, but there are four properties as follows: The URL of the document currently displayed in the current window Lengh it

/********************************************************************************* * Eo_jslib.js * JavaScript Regular expression test **********************************************************************************/ The checksum is all made up of

Later, if the time to do a query on the convenience, but is a bit more procedures, hehe! I hope you can help me test, the input time format is 1999-01-01 or 2000-10-01 or 2000-10-10, that is, the month and time must be two, in order to facilitate

Syntax format With (object instance){code block} Sometimes, I'm in a program code, many times you need to use an object's properties or methods, as before, are passed: Object. Property or object. method to obtain the object's properties and

The TextRange object is an advanced feature of Dynamic HTML (DHTML) that can be used to implement many text-related tasks, such as searching and selecting text. The text range allows you to selectively select characters, words, and sentences from

The effect is as follows js Regular matching Chinese punctuation    

Mocha is a very good test framework for Javascript/nodejs, which natively supports synchronous and asynchronous testing, but asynchronous testing, because of the explicit invocation of the done (), can easily cause asynchronous code callback to be

With the complexity of DOM structure and the application of dynamic scripting techniques such as AJAX, event delegates naturally surfaced. jquery provides the. bind (),. Live () and. Delegate () Methods for binding and delegate events. On the basis

The JavaScript code to implement this feature is as follows:As shown: The code is as follows Copy Code Similarly, this method is effective, but far from the "best method". Then I saw someone suggest using

Grammarvar Mappedarray = Array.map (callback[, Thisobject]);Parameter descriptionCallback: The callback function to execute for each array element.Thisobject: This object that is defined when the callback function is executed. Function

The code is as follows Copy Code All right, we got a primer on it. Returns a function of top, basically similar. The code is as follows Copy Code Here are the CSS and calling methods

First look at the effect, It's like backstage operation, okay, let's look at the example method JS code is as follows The code is as follows Copy Code Okay, now let's call this collapse menu method.

In current webpage development, the element ID attribute may only be used for searching elements in JavaScript, because it cannot be used repeatedly and violates the CSS coding principles, however, we have recently seen some alternative use.When

The JavaScript language is not strictly designed, and sometimes it is easy to confuse people. For example, the effectiveness of this variable is determined.Here are several examples:To understand why the above results are obtained, you must first

AvaScript is becoming more and more popular. It has become the first choice for front-end development. With NodeJS based on JavaScript, we can also develop high-performance backend services, I even saw JavaScript in the hardware programming field.

I had previously encountered the WeChat sharing function in the project, and I sorted it out myself. The specific code is as follows:The sharing feature is different from the sharing feature of the app, but the sharing feature is limited. You cannot

Js callback functions can be used in the following three ways,1. Direct callback2. call callback3. apply callbackThe callback function works properly to reduce code redundancy and enhance code readability, making code maintenance much easier.What

JavaScript Tutorial: onmouseover controls images This article is from: Web teaching Network ()

When you click an image (Image or table element) on the left of the table and move it to the center of the table:Reference content is as follows:The file is referenced as follows:Reference content is as follows:   Xp style menu effectReference