How to upload a file using an ajax call in flask

To answer your question...

HTML:

<form id="upload-file" method="post" enctype="multipart/form-data">    <fieldset>        <label for="file">Select a file</label>        <input name="file" type="file">    </fieldset>    <fieldset>        <button id="upload-file-btn" type="button">Upload</button>    </fieldset></form>

JavaScript:

$(function() {    $('#upload-file-btn').click(function() {        var form_data = new FormData($('#upload-file')[0]);        $.ajax({            type: 'POST',            url: '/uploadajax',            data: form_data,            contentType: false,            cache: false,            processData: false,            success: function(data) {                console.log('Success!');            },        });    });});

Now in your flask's endpoint view function, you can access the file's data via flask.request.files.

On a side note, forms are not tabular data, therefore they do not belong in a table. Instead, you should resort to an unordered list, or a definition list.

    in the  Javascript side::::            var form_data = new FormData();    form_data.append('file', $('#uploadfile').prop('files')[0]);    $(function() {    $.ajax({        type: 'POST',        url:  '/uploadLabel',        data: form_data,        contentType: false,        cache: false,        processData: false,        success: function(data) {            console.log('Success!');        },    });in the server side::::@app.route('/uploadLabel',methods=[ "GET",'POST'])def uploadLabel():    isthisFile=request.files.get('file')    print(isthisFile)    print(isthisFile.filename)    isthisFile.save("./"+isthisFile.filename)