How to Fix Uncaught Typeerror: Cannot Read Property 'Prototype' of Undefined?
I Have a Little Problem. I'm Using Backbone. Js. I Wrote This Code Like in Example: $(Document). Ready(Function () { Window. App = { Views: {}, Models: {}...
I have a little problem. I'm using backbone.js. I wrote this code like in example:
<script>
$(document).ready(function () {
window.App = {
Views: {},
Models: {},
Collections: {}
}
App.Collections.Users = Backbone.Collection.extend({
model: App.Models.User,
url: 'service'
});
App.Models.User = Backbone.Model.extend({});
App.Views.App = Backbone.View.extend({
initialize: function() {
console.log( this.collection.toJSON() );
}
});
});
</script>
Than I started server and in browser console type this:
var x =new App.Collections.Users();
x.fetch()
And this follows to error: Uncaught TypeError: Cannot read property 'prototype' of undefined. But data is present in response. Details in picture. How to fix this?
Thanks for you answers.
4 Answers
I fixed this bug. The problem was that I created Collection and then the Model. Collections use user model, as working unit, but when I defined this Collection, I did not define Model.
So, if you want to avoid this bug, firstly define a Model and only then define the Collection.
Backbone Js has dependency with underscore.js and jQuery, try reordering the resources. This worked for me:
<head>
<title>Backbone</title>
<!-- Scripts Load Here-->
<script type="text/javascript" src="js/jquery-1.11.0.min.js"></script>
<script type="text/javascript" src="js/underscore.js"></script>
<script type="text/javascript" src="js/backbone.js"></script>
</head>
In my case , imports were incorrect
import { urlencoded } from "express";
When I removed this statement , it worked for me.
Check imports of the files you are working with , wheteher something unnecessary imported
In my case, the following imports are incorrect: (react)
// remove
import e from 'express';
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