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Introduction to HTML_ Power Node Java College

What is HTML? HTML is a language used to describe the webpage. HTML refers to the HypertextMarkuplanguage, which is a markup language. The mark language is a set of labels (Markup TA

2025-01-31
HTML5 FormData method introduction and implementation files on the implementation file

XMLHTTPREQUEST is a browser interface. With it, we can make JavaScript communicate with HTTP (s). XMLHTTPREQUEST is a commonly used way to interact data in the present browser. In February 2008, XMLHTTPREQ

2025-01-31
Implementation method of drawing rounded avatar on canvas

If the web page you want to draw contains a canvas image of an arc-shaped avatar, but the avatar itself is square, the required method is as follows: First, get the coordinates, width and height of the avatar on the canvas: (I won’t do it here for details

2025-01-31
Rewriting the js toFixed() method achieves unification of precision

Anyone who has used the toFix() method in js should know that there is a small BUG in this method. The carry of decimals is a little different under IE and FF. For example (0.005) toFix(2)=0.00 under ie. toFix(2)=0.01 under FF. Like this

2025-01-31
JavaScript Create and Storage Cookie Example

What is a variable in the computer stored in the visitor's computer. Whenever the same computer requests a page through a browser, this cookie is sent. You can use JavaScript to create and retrieve the value of cookies. Cookie Use Scene: Name COOKIE

2025-01-31
Sample code for javascript to obtain URL parameters and parameter values

Copy the code code as follows: <script>function goto_url(url){var new_url = "http://shop.usteel.com/index.php?app=list_release";var d_date = g

2025-01-31
HTML Input File control limits upload file type

Add an Input File HTML control on the webpage:<input id=File1 type=file /> This is the case by default. All file types will be displayed. If you want to limit it to display the file type we set, such as Word, Excel, PDF file solution can be given

2025-01-31
Three characteristics of JS and functional languages

First of all, there is a concept: it is not a language that supports functions. This language can be called a "functional language". In addition to being called, functions in functional languages also have some other properties. There are the

2025-01-31
A brief introduction to reference types in Javascript

Introduction 1. Reference type (Reference type) The reference type is an internal type in JavaScript. It is mainly used as a reference, replacing a variable or function. Of course, when the real value is needed, the real value can be found through it. 2.

2025-01-31
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

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