Home  >  Article  >  Web Front-end  >  Analysis of the method of generating QR code images from links using JS

Analysis of the method of generating QR code images from links using JS

php中世界最好的语言
php中世界最好的语言Original
2018-05-10 14:01:562989browse

This time I will bring you JS to generate a QR code from a link PictureMethod analysis, what are the precautions for JS to generate a link to a QR code picture, the following is a practical case , let’s take a look.

<p id="code"></p>
<img id="img"/>
<script type="text/javascript">
  var qrcode=$("#code").qrcode({
    render:'canvas||table',
    width: 200, //宽度
    height:200, //高度
    text: "http://www.baidu.com" //任意内容
  }).hide();
  var canvas=qrcode.find('canvas').get(0);
  //如果有循环,此句必不可少 qrcode.find('canvas').remove();
  var data = canvas.toDataURL('image/jpg');
  $('#img').attr('src',data) ;
  saveFile(data,"fd范德萨范德萨");
  //转为图片的方法,需要上门的data
  function saveFile(data,filename){
    var save_link=document.createElementNS('http://www.w3.org/1999/xhtml', 'a');
    save_link.href=data;
    save_link.download=filename;
    var event=document.createEvent('MouseEvents');
    event.initMouseEvent('click',true,false,window,0,0,0,0,0,false,false,false,false,0,null);
    save_link.dispatchEvent(event);
  };
</script>

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

Recommended reading:

Detailed explanation of the steps to add events to dynamically created elements in JS

Vue routing dynamic redirection and navigation guard Implementation

The above is the detailed content of Analysis of the method of generating QR code images from links using JS. For more information, please follow other related articles on the PHP Chinese website!

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn