Weird error msg when using JS.call? - javascript

While debugging I became confused at my error. I'm using firefox+firebug
When executing this code demo I get the error
TypeError: myranges.call(...) is undefined
Code:
var myranges = function(d){
//return [5,8];
return d.undefmember;
};
myranges.call(this, 1, 2).slice();
This confused me. When I do a proper return value demo I get no issues with that line (what!?!).
Ok so it returns undefined. So shouldn't I get this better error message?
TypeError: undefined has no properties
Which happens in this demo
I'm mostly confused at either why i got that message or what does it really mean. I thought it had a problem calling the function or myranges was bad

This is most likely a problem with firebug, because demo gives TypeError: Cannot read property 'slice' of undefined right from the JS

Related

Code works in Codepen but not when called with index.html

https://codepen.io/mdaw11/pen/rNMbdqd
Created this little issue tracker for public use, works fine in Codepen, however once I try to open it in Chrome browser, the console outputs error
'Uncaught TypeError: Cannot read property 'length' of null
at fetchIssues (main.js:71)
at onload ((index):10)'
This tells me that there is something wrong with my fetchIssues(); perhaps var issues = JSON.parse(localStorage.getItem('issues')); isn't outputting what I expect it to be?
Any help would be much appreciated!
Could be fetchIssues() is being executed too early and could also happen if you don't have anything saved to the localStorage yet. Also double check what localStorage.getItem('issues') returns.
To fix that error you could try something like:
var issues = JSON.parse(localStorage.getItem('issues') || '[]');

Node.js throwing TypeError: Cannot read property 'testModule' of undefined

So I looked around, looking for solutions for this problem else where and including here, but I keep getting the error
"Cannot read property 'testModule' of undefined."
main.js:
var testing = require('./lib/test.js');
console.log(testing.testModule('user'));
./lib/test.js
module.exports = {
testModule: function(test){
return 'Hello '+test+' from module!';
}
};
What am I doing wrong and what can I do to fix this issue?
Fixed the error.
In my original code (not here) I assigned the variable testing as test and called a variable that was non-existent.
Thanks for the tips on the directory structures, though. I appreciate it.
I suck :(

AngularJS + JQuery = TypeError: Cannot read property 'then' of undefined

Trying to debug a JS issue, but not having any success - trace is below.
TypeError: Cannot read property 'then' of undefined
at Object.fn (angular.min.js:937)
at l.$get.l.$digest (angular.min.js:508)
at l.$get.l.$apply (angular.min.js:522)
at HTMLLIElement.<anonymous> (angular.min.js:928)
at HTMLLIElement.x.event.dispatch (jquery-1.11.0.min.js:10)
at HTMLLIElement.x.event.add.v.handle (jquery-1.11.0.min.js:10)
Issue is that the code generating the error does not include 'then' - I'm removing objects from an array, the error throws when the last object is removed but the app continues to function correctly. Wondering if it's just an internal Angular error that I can ignore?
How can I better trace the cause?
Updated ngAnimate module, problem gone.

Angular find where is the error come from undefined is not a function

I have error in my program suddenly and i dont find where it comes from and the console show me this error from angular source, How i can know where in my code the error comes from?
TypeError: undefined is not a function
at http://localhost/lottery-hunter/public/build/app.min.js:10:4161
at Object.fn (http://localhost/lottery-hunter/public/build/app.min.js:8:21940)
at h.$digest (http://localhost/lottery-hunter/public/build/app.min.js:8:22542)
at h.$apply (http://localhost/lottery-hunter/public/build/app.min.js:8:24028)
at f (http://localhost/lottery-hunter/public/build/app.min.js:8:4773)
at F (http://localhost/lottery-hunter/public/build/app.min.js:8:6975)
at XMLHttpRequest.x.onreadystatechange (http://localhost/lottery-hunter/public/build/app.min.js:8:7535)
The problem is showed In your error message.You called some function,which is not a function.In your ..build/app.min.js there are some errors.there are the lines numbers. for example the first problem is in 10-th line

Strange "Uncaught TypeError: String is not a function" error

I'm trying to run a simple function.
function assify(ass) {
window.location.href(ass);
}
The parameter I'm running into it is assify?id=2
I keep getting an error though (Uncaught TypeError: String is not a function)
What's going wrong here?
Thanks!
href is a property and not a method.
window.location.href = ass;

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