js前端根据链接生成二维码并转成图片下载

js前端根据链接生成二维码并转成图片下载

依赖于jquery、jquery.qrcode.min.js

1.html

下载二维码

2.js

2.1生成二维码

var url = window.location.href;
jQuery('.qrcode').qrcode(url);

2.2生成图片并下载

function downloadClick() {
	var data = $("canvas")[0].toDataURL().replace("image/png", "image/octet-stream;"); //获取二维码值，并修改响应头部。　　
	var filename = "load.png"; //保存的图片名称和格式
	var saveLink= document.createElementNS('http://www.w3.org/1999/xhtml', 'a');
	saveLink.href = data;
	saveLink.download = filename;
	var event = document.createEvent('MouseEvents');
	event.initMouseEvent('click', true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);
	saveLink.dispatchEvent(event);
}