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Summary of commonly used js verification and data processing

Preface When developing web projects, it is inevitable to encounter various processing of web page data, such as verification of the phone number, email address, amount, ID number, password length and complexity entered by the user in the form, as well as

2025-08-10
JS method to randomly extract several array elements from an array

How to randomly extract an element or several elements from an array. If the array is var items = ['1','2','4','5','6','7','8','9','10']; 1. Randomly extract an element from the array

2025-08-10
Javascript learning talks about global and local variables of JS (recommended)

Today, a little intern in the company asked me the difference between two JS codes: Code 1:<script type="text/javascript"> var a = "Hello"; function test(){ var a; alert(a); a =

2025-08-10
About the solution to uploading images to display the number of bytes of 0 in WeChat browser of Android mobile phone

In front-end JS, you use XMLHttpRequest 2 to upload images to the server. It is normal on PC and most mobile phones, but uploading on a small number of Android phones fails. When you view the image on the server, the number of bytes is displayed is 0. Her

2025-08-10
HTML5 audio tags use js for playback control example

This article mainly introduces the HTML5 audio tag using js for playback control examples. This article directly gives code examples and demonstrates control methods such as obtaining playback time, playback, pause, and mute. Friends who need it can refer

2025-08-10
A brief analysis of the construction of a large-scale application of Vue.js, a front-end framework

True modular front-end modularization has begun very early. Whether it is required.js, browserify for modular packaging, or Angular for dependency injection, we can divide the JS code into small modules and assemble them. Then we will use less or sass to

2025-08-10
js get and set the display value of p tag through html() and text() methods

html() method This method is similar to the innerHTML attribute in JavaScript, and can be used to read or set the HTML content in a certain element. To get the content of an element, you can do this: Copy the code as follows: var p_html = $("p")

2025-08-10
JS solves the problem of communication and adaptive height between iframes

First of all, iframe communication is divided into: same-domain communication and cross-domain communication. 1. Same-domain communication The so-called Same-domain communication refers to the nested iframes of a.html page under http://localhost/demo/ifra

2025-08-10
Verify before form submission in EasyUI

Using EasyUi we can verify before submitting the client form. The process is as follows: just use the return $("#form1").form('validate') method when onSubmit, and the from('validate') square in the form module in EasyUi

2025-08-10
A simple image switching effect implemented with html+css+js

As shown in the figure. The image switching effect is simple to implement and has good compatibility. The html page is as follows to copy the code code as follows:<div><div id="focus"><ul><li>

2025-08-10
Do you know how setTimeout works?

Please look at the following code and guess the execution result: var start = new Date;setTimeout(function(){ console.log('Time has passed:'+(new Date - start)+'msec');}, 200); while

2025-08-10
AngularJS introduction tutorial: Iterator filtering detailed explanation

We have done a lot of basic training in the previous step, so now we can do some simple things. We want to add the full text search function (yes, this is really very simple!). At the same time, we will also write an end-to-end test, because a good end-to

2025-08-09
js get the current year, month, date - implementation code in YYYYmmDD format

js get the current year, month, day - implementation code of YYYYmmDD format var nowDate = new Date(); var year = nowDate.getFullYear(); var month = nowDate.getMonth() + 1

2025-08-09
Tutorial on using stream in node.js

I went to study OC these days, but I haven't learned it yet. It's still a long time before changing careers, so let's review the knowledge of node. There are many people coming and going in each language, but I can’t live without node. I'm

2025-08-09
JS implements div simulation dialog box to display URL content

This article describes the implementation of the div simulation dialog box to display URL content in js. Share it for your reference, as follows: <script>function sAlert(str){ var msgw,msgh,bordercolor; msgw=800;//提示窗口的宽度

2025-08-09

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