HTML5 datalist与动态邮箱地址实例

时间：2021-01-05 19:17:14
<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
邮箱：<input type="email" id="email" list="emailList" name="off_autocomplete" />
   <datalist id="emailList">
       <option value="*@qq.com">
       <option value="*@163.com">
       <option value="*@gmail.com">
       <option value="*@yahoo.com.cn">
       <option value="*@126.com">
   </datalist>

   <script>
var eleList = document.getElementById("emailList")
               , eleMail = document.getElementById("email")
               , htmlListInit = '', arrEmailList = [];

if (eleMail && eleList && (htmlListInit = eleList.innerHTML) !== '') {
// 得到类似["qq.com", "163.com", "gmail.com", ...]的数据
           arrEmailList = [].slice.call(eleList.getElementsByTagName("option")).map(function(option) {
return option.value.replace("*@", "");
           });

eleMail.fnListReplace = function() {
var arrValue = this.value.trim().split("@");
// 修复FireFox浏览器下无限input问题
               // 如果值不完全匹配某option值，执行动态替换
               if (arrValue.length !== 2 || arrEmailList.indexOf(arrValue[1]) === -1) {
eleList.innerHTML = htmlListInit.replace(/\*/g, arrValue[0]);
               }
return this;
           };
// 绑定输入事件侦听
           eleMail.addEventListener("input", function() {
this.fnListReplace.call(this);
           }, false);

//  载入即匹配
           eleMail.fnListReplace.call(eleMail).focus();
       } else {
eleList = document.createElement("datalist");
eleList.innerHTML = '<p class=sorry>抱歉，当前浏览器不支持HTML5 datalist.</p>';
eleMail.parentNode.appendChild(eleList);
       }
   </script>
</body>


</html>
标签：

相关文章