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.
asked Oct 31, 2013 at 9:33
Oleksandr HOleksandr H
2,96510 gold badges40 silver badges57 bronze badges
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.
DJG22
1,7463 gold badges34 silver badges65 bronze badges
answered Oct 31, 2013 at 10:15
Oleksandr HOleksandr H
2,96510 gold badges40 silver badges57 bronze badges
6
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>
answered May 24, 2014 at 5:51
rzskhrrzskhr
90111 silver badges9 bronze badges
2
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
answered May 27, 2021 at 11:03
In my case, the following imports are incorrect: (react)
// remove
import e from 'express';
answered May 8, 2021 at 9:03
niek tuytelniek tuytel
8797 silver badges18 bronze badges
Answer by Stephanie Patrick
Cannot read property ‘prototype’ of undefined,Uncaught TypeError: Cannot read property ‘prototype’ of undefined,
Is there a term for the letter T not being pronounced when at the end of a word?
item.ts:
export class Item {
myAwesomeFunction() {
...
}
}
index.ts (to be able to reference smoothly):
...
export * from './item';
...
other.item.ts:
import { ..., Item, ... } from './index';
export class OtherItem extends Item ... {
...
}
After changing other.item.ts to the following, it worked:
import { ... } from './index';
import { Item } from './item';
export class OtherItem extends Item ... {
...
}
Answer by Derrick Hunter
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>
Answer by Matteo Hickman
To any one who get into this problem (common.js:48 Uncaught TypeError: Cannot read property ‘prototype’ of undefined) from Google .,TypeError: Cannot read property ‘prototype’ of undefined
i have this error ,please let me know we having the problem?,For «prototype of undefined» like errors, please try to fetch an api key from google: https://developers.google.com/maps/documentation/javascript/
new GMaps({
div: '#gmap',
lat: -12.043333,
lng: -77.028333
});Answer by Zakai Benson
I get an Uncaught TypeError when displaying a page. It says:
,
#3065062: Getting «Uncaught TypeError: Cannot read property ‘prototype’ of undefined» ,
#3065149: Uncaught TypeError: Cannot set property ‘Bridge’ of undefined
I tried to alert('Hey') in docroot/themes/contrib/bootstrap/js/misc/ajax.js before findGlyphicon like below but couldn’t see anything.
alert("Hello! I am an alert box!!");
Drupal.Ajax.prototype.findGlyphicon = function (element) {
return $(element).closest('.form-item').find('.ajax-progress.glyphicon')
};
Answer by Layne Morrison
ourcodeworld.com is using a security service for protection against online attacks. This process is automatic. You will be redirected once the validation is complete. , Please enable cookies on your browser and try again.
More Details Refer
Answer by Jasiah Green
More Details Refer
Answer by Kaleb Perkins
import response from { ‘express’ },I found the I have mistakenly typed,I found that this problem happens when you try to call backEnd stuff in your frontEnd.
when I delete that line problem solved.
I found the I have mistakenly typed
import response from { 'express' }
import response from { 'express' }Answer by Thea Palmer
I Have the following error when i execute «node app» coomand,
TypeError: Cannot read property ‘prototype’ of undefined
,same issue, you need to upgrade the project code for latest node and socket.io version
More Details Refer
Answer by Lana Lucas
TreeGrid control v17.1.39, after production build — Cannot read property ‘prototype’ of undefined
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Answer by Annalise Bishop
I’ve got this error : Cannot read property ‘prototype’ of undefined
,
I’ve got this error : Cannot read property ‘prototype’ of undefined ,
google-chrome-extension
More Details Refer
Answer by Dario Arroyo
“TypeError: Cannot read property ‘prototype’ of undefined” in _extends method.,It seems the TS compiler misordered the subclass before the base class so that the this error happens.,Thanks! I verified the generated js code, the subclass is indeed decleared before the base class.
This compiled code will throw a ReferenceError exception by native javascript engine if Class syntax is implemented. It means that TS...🐛 Bug Report
I was trying to mock redis module using jest.mock('redis'). The test failed with following error
TypeError: Cannot read property 'prototype' of undefined
at Object.<anonymous> (node_modules/redis/lib/individualCommands.js:26:13)
at Object.<anonymous> (node_modules/redis/index.js:1102:1)
To Reproduce
Steps to reproduce the behavior:
- install redis
npm i redis@2.8.0 - create a test file
mocking-redis.test.jswith following content
jest.mock('redis');
const redis = require('redis');
describe('Tests', () => {
test('test1', () => {
expect(true).toEqual(true);
});
});
Expected behavior
redis should be mocked and test should pass successfully
Link to repl or repo (highly encouraged)
https://github.com/Amit-Modi/jest-mocking-experiments
envinfo
npx: installed 1 in 1.136s System: OS: macOS Mojave 10.14.5 CPU: (4) x64 Intel(R) Core(TM) i5-7360U CPU @ 2.30GHz Binaries: Node: 10.16.0 - /usr/local/bin/node npm: 6.9.0 - /usr/local/bin/npm npmPackages: jest: ^24.9.0 => 24.9.0
Discover why this exception appears when using Vue Bootstrap in Vue.js 3.
In the last days I applied for a new job where Vue.js was a requirement to apply, in order to get in, I needed to present a test to design a dashboard with Bootstrap Vue.
While trying to set up a new project, the CLI offered me the possibility to work With Vue 2 and Vue 3 so I decided to go on with the latest version (Vue 3). After reading the documentation, getting comfortable with the way Vue.js works, I started to create some components and they work as expected. When I was ready to start with the bootstrap library, after the installation and after trying to import the library as it theoretically should:
// main.js
import App from './App.vue'
import { createApp } from 'vue'
import { BootstrapVue, IconsPlugin } from 'bootstrap-vue'
// Install BootstrapVue
App.use(BootstrapVue)
// Optionally install the BootstrapVue icon components plugin
App.use(IconsPlugin)
createApp(App).mount('#app')When trying to build the project, the following exception will appear on the terminal:
config.js?228e:8 Uncaught TypeError: Cannot read property 'prototype' of undefined
at eval (config.js?228e:8)
at Module../node_modules/bootstrap-vue/esm/utils/config.js (chunk-vendors.js:3251)
at __webpack_require__ (app.js:849)
at fn (app.js:151)
at eval (alert.js?5fda:1)
at Module../node_modules/bootstrap-vue/esm/components/alert/alert.js (chunk-vendors.js:83)
at __webpack_require__ (app.js:849)
at fn (app.js:151)
at eval (index.js?cca8:1)
at Module../node_modules/bootstrap-vue/esm/components/alert/index.js (chunk-vendors.js:95)This problem doesn’t have solution till the date as Bootstrap Vue doesn’t provide support for Vue 3 yet, however it seems that the support will arrive to production soon.
- Vue 3 Support will arrive soon
Solution
For now, I hope that you are starting a project from scratch as I did because you will need to downgrade your Vue.js project from version 3 to Vue.js 2.
Happy coding ❤️!
After installing Redis in our server as outlined in my last post on installation of Redis in CentOS 6.5, it was time for me to setup ExpressJS-NodeJS-Redis(Session Store) setup for the webapp that I am working on.
Everthing seemed perfect until I attempted to start the node server using the command: node app.js. I was welcomed with the below error message which highlighted the fact that connect-redis npm module had falied to connect to my Redis server.
var redis_store = require('connect-redis')(express);
TypeError: Cannot read property 'prototype' of undefined
at module.exports (/home/nodeuser/node_modules/connect-redis/lib/connect-redis.js:96:41)
at repl:1:43
at REPLServer.self.eval (repl.js:110:21)
at repl.js:249:20
at REPLServer.self.eval (repl.js:122:7)
at Interface.<anonymous> (repl.js:239:12)
at Interface.EventEmitter.emit (events.js:95:17)
at Interface._onLine (readline.js:202:10)
at Interface._line (readline.js:531:8)
at Interface._ttyWrite (readline.js:760:14)
Upon scouting Internet for answers, the solution posted by Andrei Karpushonak at StackOverflow post titled, ‘RedisStore – TypeError: Cannot read property ‘prototype’ of undefined‘ solved the issue.
Since I have used expressjs version 3.4.8 in my application, I had to use a compatible connect-redis npm. As per the StackOverflow post, the version mentioned by Andrei Karpushonak is 1.4.7.
I installed connect-redis-1.4.7 using the command: npm install --save connect-redis@1.4.7 and the webapp started without reporting any failures.