二维码格式演示
（扫描此二维码会自动跳转到我博客的首页O(∩_∩)O~）
<!DOCTYPE html><html lang="en"><head> ???<meta charset="UTF-8"> ???<title>qrcode.js插件将你的内容转换成二维码格式</title> ???<link rel="stylesheet" href="css/style.css"></head><body> ???<div class="lanren"> ???????<h1>Gary_请在下面输入框中输入内容</h1> ???????<input type="text" placeholder="请在这里输入内容" id="demo"> ???????<button id="send">点击生成二维码</button> ??????????<br></br><br></br> ???????<div id="qrcode"></div> ???</div> ???<p></p> ???<script src="js/qrcode.min.js"></script> ???<script> ???window.onload =function(){ ???????(function(){ ???????????var defaultContent = ‘http://www.cnblogs.com/1138720556Gary/‘; ???????????var content = document.getElementById("qrcode"); ???????????var qrcode = new QRCode(content,{ ???????????????width:200, ???????????????height:200 ???????????}); ???????????document.getElementById("send").onclick =function(){ ???????????????var value = document.getElementById("demo").value || defaultContent; ???????????????qrcode.makeCode(value); ???????????????content.style.display = "block"; ???????????} ???????})(); ???}</script></body></html>实现过程：
JS框架_(Qrcode.js)插件将你的内容转换成二维码格式
原文地址：https://www.cnblogs.com/1138720556Gary/p/9383358.html