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Understanding of defining a function of new functionName()

For example, define two calling methods for a function: Copy the code as follows: function getInfo() { var info = { message: "message" }; return info; } 1. var info1 = getInfo(

2025-08-11
A brief discussion on js basic data types and typeof

JavaScript data types are very concise, it only defines the basic data types null in 6: empty and none. Indicates that it does not exist. When assigning a value to the object's attribute to null, it means that the attribute is deleted undefined: undef

2025-08-11
Simple example of js method data verification

Example: //input tag can only be positive numbers<input onkeyup="this.value=this.value.replace(/[^1-9]/g,'')" > //Only positive integer function CheckNum(thisobj) {if

2025-08-11
Summary of the usage of various page switching effects and modal dialog boxes in html5

This article mainly introduces the use of various page switching effects and modal dialog boxes for you. It introduces the usage techniques of various page elements of HTML5 in more detail. It is very practical. Friends who need it can refer to the follow

2025-08-11
input new attribute range usage record in html5

The previous work needs to be completed, record a new input property in html5, range. I found that this attribute is in the toner of a website. It feels really vivid and beautiful. Friends who like it can see that after two days, there is no computer, no

2025-08-11
Vuejs Chapter 10: vuejs parent-child component communication

This article is a more detailed and comprehensive tutorial compiled by the editor in combination with official documents. It is very good and is more suitable for beginners to read. This information comes from the official document: http://cn.vuejs.org/gu

2025-08-11
Introduction to the configuration method and common commands of nodejs npm package management

1. Enter npm config ls -l to view the current directory settings Copy code code as follows:; cli configslong = true; builtin config C:/Program Files (x86)/nodejs/node_m

2025-08-11
Graphics and texts explain the prototype objects and prototype chains of JavaScript in detail

For newcomers, JavaScript prototype is a very troublesome thing. First, prototype is easy to be confused with __proto__, and second, the various directions between them are really complicated. In fact, there are already many articles on the market trying

2025-08-11
Use ajaxfileupload.js to implement the upload function

I have always uploaded files using form forms to upload files. I have also seen people upload files using js, but it seems quite simple, so I didn't pay much attention to it. Today I suddenly wanted to use this method to upload files, and I encountere

2025-08-11
The perfect solution for tbody's innerHTML cannot be assigned value in IE6/IE7/IE8/IE9

Recently, it has been found that all major libraries can use xxx.innerHTML=HTML fragments to generate node elements, and then insert them into various locations of the target element. This thing is actually insertAdjacentHTML, but IE's abominable inne

2025-08-11
Html5 FileReader implements instant image uploading function example code

This article mainly introduces the real-time uploading of images by Html5 FileReader. Because the project only requires it to be above ie9, I didn’t write ie8. If you need it, you can refer to the preview below. It is still different from ie8. However, I

2025-08-11
Simple instance of traversing Map objects in js

Examples are as follows: console.log(jsonData);//Firefox console printout: Object { fileNumber="file number", fileName="file name"}for(var key in jsonData) console.lo

2025-08-11
JS traversal map Simple implementation of javascript traversal map

js traversal map javascript traversal map var map = { "name" : "Andy Lau", "realname": "Andy Lau" };for (var key in map) { console

2025-08-11
Only one form js implements the function of filling in the registration information in sequence

We were originally a very long form form with many options. Customer feedback is not friendly enough and easy to see. Therefore, improvements are made to achieve multi-step progress and multiple submissions implementation (in fact, there is only one form

2025-08-11
Several methods for VC to call javascript (recommended)

The first type: call through execScript. Although this method is easy to operate, it cannot obtain the return value. m_spHtmlDoc->get_parentWindow(&m_pHtmlWindow);VARIANT ret;ret.vt = VT_EMPTY;BSTR

2025-08-11

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