Ajax函数尝试catch块不正确

Question

我有下面的代码，但我不确定我的试捕块是否真的正确。有人能指点我吗？

var upload = new FormData($("#video_upload")[0]);
 

    try {
            $.ajax({
                url: "files/video_upload",
                enctype: 'multipart/form-data',
                type: 'POST',
                data: upload,
                async: false,
                success: function (data) {
                    $('.filesToUpload').empty();
                },
                cache: false,
                contentType: false,
                processData: false
            });
    } catch (Exception e) {
    alert (‘Upload Failed.');
    }

Answer 1

而不是在ajax中使用try-catch。当请求失败时，可以使用ajax请求返回的错误函数。

 $.ajax({
                url: "files/video_upload",
                enctype: 'multipart/form-data',
                type: 'POST',
                data: upload,
                async: false,
                success: function (data) {
                    $('.filesToUpload').empty();
                },
                //Add this
                error: function (error) {
                    console.log(error)
                },
                cache: false,
                contentType: false,
                processData: false
            });