Solve the problem of generating qr codes multiple times

The IMG tag is added every time you click

The solution is as follows:

handleExtendDialog(row) { // this.qrcode(); This.$nextTick(function() {let dom =.$nextTick(function() {let dom = document.getElementById("qrcode"); The firstChild property returns the firstChild of the selected node. while (dom.firstChild) { dom.removeChild(dom.firstChild); } this.qrcode(); }); },Copy the code