Call javascript function flask

from flask import Flask, render_template

app = Flask(__name__)


@app.route('/', methods=['GET', 'POST'])
def upload_file():
    if request.method == 'POST':
        #verify if the file is valid
        #here invoke js to do something (for example flash("test"))
        return render_template('upload.html', flash_message="True")

    return render_template('upload.html', flash_message="False")

Source: stackoverflow.com

Javascript function from python flask

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Upload new File</title>
</head>
<body onload="flashMessage()">
  <script>
    function flashMessage() {
      if ("{{ flash_message }}" == "True") {
        alert("[YOUR_MESSAGE_HERE]");
      }
    }
  </script>

  <h1>Upload new File</h1>
  <form method=post enctype=multipart/form-data>
    <input type=file name=file>
    <input type=submit value=Upload>
  </form>
</body>
</html>

Source: stackoverflow.com

Similar codes

0 vote250 views1 answer
How to get wikipedia photos using wikipedia module ip python
Python
1 vote193 views1 answer
Brz: ERROR: TypeError: a bytes-like object is required, not 'str'
Python
3 votes198 views3 answers
Length of int in python
Python
21 votes279 views4 answers
Send dm discord py
Python
0 vote175 views1 answer
Convert_hex_to_ASCII_3.py
Python
14 votes194 views6 answers
Permutations in python
Python
0 vote199 views1 answer
Récupérer texte d'une image python
Python
4 votes194 views1 answer
Get os information python
Python
2 votes219 views2 answers
Python !=
Python
26 votes192 views4 answers
Python ceiling
Python