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Web design tutorial

Use js to determine whether an array contains an element (similar to in_array() in php)

The fastest copy code of while case is as follows: function contains(arr, str) {var i = arr.length;while (i--) {if (arr[i] === str) {return true;} }

2025-01-31
Create download file in browser with JS

But limited by browsers, in many cases we can only give a link and let users click to open -> Save As. For example, the link below: Copy the code as follows: <a href=”file.js”>file.js</a> When a user clicks this link, the browser will open and display

2025-01-31
Sample code for canvas trigonometric function to simulate water wave effect

In a recent project, the UI designed a background animation with a water wave effect. However, there was no gif or svg animation. I tried to use CSS to implement it, but the animation effect was not very good. I checked online and basically used Bezier cu

2025-01-31
Solve the cross-domain problem of downloading files on the service using the download attribute of the H5 a tag

1. The simplest way to download multimedia files (pictures/videos/documents, etc.) by clicking: It is normal <a href=url download=filename.ext>to download files</a> if the URL points to the same source resource. If the URL points to a third-party resource

2025-01-31
Html picture IMG tag_mynwoman node java college finishing

Abstract project description form<img src=...>

2025-01-31
Sample code for using clip to cut out an area in html5-canvas

I wanted to cut out an area in a fillRect for my use. This was used when I was learning the clip method, but I couldn't find the clipping area. The code is as follows<!DOCTYPE html><html><head>

2025-01-30
JS forms a mask effect example code of the page

Please download the jQuery library replication code before using this forging code as follows: Var MaskstackCount = 0; Function Mask (Method) {// Here is the window you want to cover. What I want to cover here is an iframe window. You can also use Var Win

2025-01-30
HTML5 device access device access detailed explanation

The camera api (including image preview) reference address mainly uses input type=file, accept=image/* to process image preview methods (two types) const file = e.target.files[0]//method 1 const url1

2025-01-30
The newly added content is how to automatically move the DIV's scrollbar at the bottom below

Sometimes when we do dynamic growth DIV, we generally use the content of the content of the content to the bottom, but this will bring a more painful problem, that is, the newly added content will be covered at the bottom, such as this that is like this H

2025-01-30
HTML5 Canvas rotating windmill drawing

Write in front: Hello, my dear friends, I am a self -taught at the forefront. For the first time I write a blog, I am not writing a bad place, please forgive me to understand. Before teaching, I think you have mastered the basic Canvas and basically. The

2025-01-30
Detailed explanation of meta tags and usage in html

No more nonsense, let’s start with today’s topic. html/11675.html">meta tag in Html 1. Meaning of meta tag<meta> Elements provide meta-information about the page, such as descriptions and keywords for search engines and update frequency.

2025-01-30
HTML5 Form_ Power Node Java College

The role of the table is to display the two -dimensional data. In HTML5, the layout of the content of the page is not allowed to control the page content. Instead, the new CSS table characteristics are used (the CSS is not involved here, it will be introd

2025-01-30
JavaScript gets the mouse click element object (sample code)

IE: var obj=document.elementFromPoint(event.clientX,event.clientY); Get the object text var a=obj.innerTextFF requires adding an object to the event to read the coordinates. HTML:on

2025-01-30
js clears the value range of type equal to file in input (sample code)

as follows;var objFile = document.getElementById('fileID');objFile.outerHTML=objFile.outerHTML.replace(/(value=/").+/"/i,"$1/"

2025-01-30
html5 custom form_Motor node java college finishing

There are a variety of different input boxes and buttons in HTML5. It is achieved by setting the Type attribute of the INPUT element. In addition, HTML5 also supports the selection list, multi -line input box, etc. These elements have their own purpose an

2025-01-30

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