How to implement downloading in javascript

Javascript method to implement downloading: 1. Use the href attribute of the a tag to add the file URL, with the syntax "Download"; 2. Use URL jumps to download, the syntax is "window.open(file url)".

The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer

Use JS to achieve downloading File function?

The common method is to create a new download:

1. a tag

<a href="前端框架-Minton.rar">下载</a>

 function commDownload1(url, params) {
     url += "?";
    for(let key in params) {
         url += key + "=" + params[key] + "&";
     }
     url = url.substr(0, url.length - 1);
     $("<a href=" + url + " />")[0].click();
 }

2. URL jump

function commDownload2(url, params) {
     url += "?";
     for(let key in params) {
         url += key + "=" + params[key] + "&";
     }
    url = url.substr(0, url.length - 1);
    window.open(url);

a tag has a better experience. The other two will open a new tag and download again. The whole process of closing the new tab feels dizzying, so it is recommended to use the a tag to implement the download function.

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