#yyds干货盘点#js截取文件后缀名

Posted 2022-07-08 尼羲

方法一:

<input type="file" onChange="change(event)">
<script>
function change(event) 
    var fileName = event.target.files[0].name.toLowerCase();
    var lastIndex = fileName.lastIndexOf(.);
    var suffix = fileName.substring(lastIndex, fileName.length);
    console.log(suffix);

</script>

方法二:

<input type="file" onChange="change(event)">
<script>
function change(event) 
    var fileName = event.target.files[0].name.toLowerCase();
    var suffix = fileName.split(.).pop();
    console.log(suffix);

</script>

方法三：

<input type="file" onChange="change(event)">
<script>
function change(event) 
    var fileName = event.target.files[0].name.toLowerCase();
    var suffix = fileName.match(/.[^.]+$/)[0];
    console.log(suffix);