python-eel/Eel

Cannot read properties of undefined (reading 'send')

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#650 opened on Dec 10, 2022

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Description

Problem "Uncaught TypeError: Cannot read properties of undefined (reading 'send')" when i trying run a function with "eel.nice()" inside.

app.py

@eel.expose
def nice():
    print("GG")

topnav.html

        checkBox = document.getElementById('flexSwitchCheckDefault').addEventListener('click', event => {
            if(event.target.checked) {
                eel.nice()
                document.getElementById("languageSelect").setAttribute("disabled", '');
            }
            else {
                eel.nice()
                document.getElementById("languageSelect").removeAttribute("disabled");
            }
        });

This problem only appears if you put another code file using jquery. Is there an option when importing another html file to fix the problem or will EEL only work directly? Script in index.html:

 $(function(){
      $("#includedContent").load("topnav.html"); 
    });

image

Desktop

  • OS: Windows 10 Pro
  • Browser: chrome
  • Version 110.0.5468.0, canary (64 bit)

Contributor guide

Research direction
Inspect the initialization order of Eel and the dynamic loading of HTML via jQuery. The issue may be that eel object is undefined when the callback runs, possibly because the script that defines eel is loaded after the HTML content. Check the Eel documentation for proper initialization sequence and ensure that the eel.js script is loaded before calling eel.nice().
Tech stack
pythonjavascript
Domain
desktop
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
PythonEelJavaScript
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75