js正则匹配获取文件名原文地址：https://blog.csdn.net/qq_38836082/article/de


//获取文件名，不带后缀
var file_name=file_path.replace(/(.*\/)*([^.]+).*/ig,"$2");


//获取文件后缀
1.var FileExt=file_path.replace(/.+\./,"");
2.var fileExtension = file_path.substring(file_path.lastIndexOf('.') + 1);


//截取文件后缀
var reg = /\.\w+$/;
var file_name = file_path.replace(reg,'');

原文地址：blog.csdn.net/qq_38836082…

获取视频ID:

<script>
    $('#submit').click(function () {
        var inputVal = $('#form-input').val();
        if(inputVal.indexOf('//v.qq.com/') < 0 ){
            alert("仅支持xx视频链接");
            return;
        }
        var videoId = inputVal.replace(/(.*\/)*([^.]+).*/ig,"$2");
        console.log('videoId: '+videoId);
        videoPlayer(videoId);
    });
    function videoPlayer(vid) {
        //video code
        
    }
</script>