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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <meta http-equiv="X-UA-Compatible" content="IE=edge">
- <meta name="viewport" content="width=device-width, initial-scale=1.0">
- <script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.0/jquery.js"></script>
- <title>Document</title>
-
- </head>
- <body>
- <form onsubmit="return false">
- <input type="text" id="usname" value="sd" >
- </form>
- <script>
- var form=document.getElementsByTagName("form") [0];
- form.addEventListener("submit",function(e){
- e.preventDefault(); //阻止元素的默认行为
- });
- $("#usname").keydown(function(event){
- if(event.keyCode==13){
- console.log('你按下了Enter 并再文本框框里输入了'+this.value);
- }
- });
-
- </script>
- </body>
- </html>
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