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HTML5 opens the mobile phone code scanning function and its advantages and disadvantages

1. Problems solved: 1. Can call up the camera to scan the QR code and parse it in the Weibo client; 2. Can scan the QR code and parse it in the native browser and WeChat client; 2. Advantages: web client or The h5 end can directly complete the work of sca

2025-01-27
A brief analysis of the impact of the html size and css size of the canvas element on the visual appearance of the element

Problems encountered: html/11467.html">The reason why the canvas element is deformed and distorted. A DOM element has three sizes: style size, html size, and css size. When using the canvas element, the default width and height of the canvas eleme

2025-01-27
Two ways to implement click-to-download files on HTML pages

1. Use <a>tags to complete</a> <a href=/user/test/xxxx.txt download=文件名.txt>click-to-download</a> so that when the user opens the browser and clicks on the link, the file will be downloaded directly. But there is a situation, such as txt, png, jpg and oth

2025-01-27
Implementation method of DIV losing focus (blur)

Use anti-shake to make DIV disappear when the mouse is moved out. Since the div tag itself does not support the onblur event, so for a div that pops up when a button is clicked, we want to make it disappear when the div loses focus, which cannot be achiev

2025-01-27
Loop through all elements in an array using javascript array length

Copy the code code as follows: <script type="text/javascript"><!--var arr = new Array(13.5,3,4,5,6);for(var i=0;i<arr.length;i++){arr[i] = arr

2025-01-27
How to force vertical screen on mobile page

Recently, I wrote a mobile page at work. It was nothing at first, but there was a requirement that seemed very strange. I had never encountered it before. The page I wrote needed to be placed in an APP, but the APP was in landscape orientation. , the webv

2025-01-27
Core JS code for setting different colors for table odd and even rows

This is a more practical function. After setting the odd and even rows to different colors, the experience of reading table data will obviously become better. Otherwise, the data will appear very complicated and crowded (the experience will be especially

2025-01-27
Web page screen recording implementation

After reading the previous comments, I suddenly realized that I did not explain it in advance. This article can be said to be a research and learning article. It is a set of solutions that I feel is feasible. I will read some similar code libraries that h

2025-01-27
Implementation example of waking up Baidu and Amap APP in Html5

A few days ago, United Black Card reported a need to open Baidu APP or Amap APP in H5, so I checked the relevant documents online and put the links below: 1. Amap 2. Baidu Map specific ideas When you click to select a map, you first request the APP link.

2025-01-27
html5 canvas draws radioactive gradient color effect

There are still some pitfalls in canvas. For example, fillRect is a method, not an attribute. If you write fillRect=, it will have no effect, and it will not report an error.... The createRadialGradient API is used here. This API receives 6 parameters, an

2025-01-27
The problem of conflict between js function name and form element with the same name

Today, when exporting Excel, I used the input hidden of the Form to distinguish export and search. At the beginning, the function name of the onClick event in js is the same as the id name in hidden. As a result, an error is reported: The object in the li

2025-01-26
JS replace method

Definition and Usage The replace() method is used to replace some characters with other characters in a string, or replace a substring that matches a regular expression. [Ctrl+A Select all Note: If you need to introduce external Js, you need to refresh be

2025-01-26
HTML5 achieves perfect writing method for mobile terminal adaptation

On the PC version web page (http://pc_url), add:<link rel=alternate media=only screen and(max-width: 640px) href=http://pc_url > On the mobile version of the page (http:/

2025-01-26
Canvas text collision detection and thinning method

Requirement background Text thinning is generally used when making map-related requirements. I only implemented this method when implementing a function for the company's map engine. I have simplified it here and performed it on an ordinary Canvas. Th

2025-01-26
Specific implementation of httpclient simulated login (use js to set cookie)

httpclient simulates login (use js to set cookies) Copy the code as follows:<html><meta http-equiv='Content-Type' content='text/html; charset=gb2312'>

2025-01-26

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