JavaScript

For floating point numbers with multiple digits after decimal points, we may only need to retain two digits, but js does not provide such a direct function. Therefore, we have to write the function to implement this function by ourselves. The Code

Recently I made a project and used javascript to manipulate excel to generate reports. Below is an example with detailed annotations.Copy codeThe Code is as follows: ziyuanweihu card number password billing method valid days

Preface After reading the javascript authoritative guide last night, I saw the author encapsulate a new API classLIst class of HTML5, which is compatible with all browsers. I thought about it and thought that I had to play it, but the ability was

Just like the language style guide, the mode library has two main purposes. First, they provide a set of coding or design standards,WebThe development team can apply the Code on the entire website to help maintain consistent coding practices and

In JavaScript, a function is a first-class citizen. A function is a data type in JavaScript, rather than being used as a module just like C # or other descriptive languages. There are four call modes for a function: function call form, method call

  Today, I encountered another task of webpage data capturing. Speaking of webpage information capturing, we believe that Jsoup is basically the preferred tool. It is very comfortable to use JQuery-like operations. However, today we will talk about

Sometimes js is required to write some functions for testing. If the test execution time is required, a stopwatch may be required: StopWatch class: Function stopWatch () {} stopWatch. prototype. start = function () {this. startD = new Date ();

In JavaScript development, I was asked: What is the difference between null and undefined? It is hard to answer at a time, especially undefined, because it involves the implementation principle of undefined. Total offices: null = undefined But:

JavaScript is a loose language, which may cause more trouble. For example, the definition and use of JavaScript arrays are too flexible and sometimes confusing. Next we will list the common methods and definitions of arrays in JavaScript, hoping to

This article mainly introduces a simple example of jQuery scroll event to implement monitoring scroll bar paging. It uses ajax loading and also introduces (document ). height () and $ (window ). the difference between height () and height (). For

1. HTML Sometimes, an HTML clip is saved in an HTML file. On the other homepage, the HTML file is read directly, and the HTML code snippet in the parsing is integrated into the home page. Fragment.html file with the following content:Copy codeThe

JQuery's methods for obtaining and setting Select Options are summarized as follows: Code: Copy codeThe Code is as follows:$ ("# Select_id"). change (function () {// code...}); // adds an event for Select, which is triggered when one of the selected

Compile a simple calendar. Enter the date to be searched in the text box. The program can calculate the week number of the day in the year and determine the day number of the week. For more information, seeFor interaction, we should select Js for

Method 1: /* Anim class. */var Anim = function() { ...};Anim.prototype.start = function() { ...};Anim.prototype.stop = function() { ...};/* Usage. */var myAnim = new Anim();myAnim.start();...myAnim.stop(); Method 2: /* Anim class, with a

I believe many people will use the function of automatically matching keywords in the search bar. Many of them use this keyword matching technology, whether it is a professional search engine like google or a common website, the keyword matching

Highcharts is a pure Javascript class library for creating charts,The main features are as follows: Compatibility: compatible with all browsers today, including iPhone, IE and Firefox;Non-commercial users are free of charge (including personal

A strange thing is: after clicking the button in a pop-up window, I did not expect the pop-up window to disappear. After debugging by the company's js experts, I found the mysteries.Copy codeThe Code is as follows: Add a questionnaire Just add a

What is a cross-origin request? A simple understanding is to send a request to a server file that is not in the same domain name. This is an example. For example, if baidu.com sends a request to phpernote.com, the two domain names are different, so

JavaScript retrieves the current date and time and displays the day of the week at the same time. The Code is as follows: How to dynamically display the current date and time on the webpage and display the week in a timely

JS implements the copy and paste functions. The following simple code can only implement the copy function in IE, and the test is no problem in IE browser. But Firefox cannot. The sample code is as follows: The html code is as follows: The JS