Angular 2 - TypeError: Cannot read property 'apply' of undefined

Question

I'm developing a very simple Angular 2 application with only one component, one service and one interface but I came across this error and after a few hours of investigating I still can't find an answer.

Uncaught TypeError: Cannot read property 'apply' of undefined
    at XMLHttpRequest.desc.get [as ontimeout] (zone.js:1265)
    at XHRLocalObject.AbstractXHRObject._cleanup (abstract-xhr.js:149)
    at XMLHttpRequest.xhr.onreadystatechange (abstract-xhr.js:125)
    at XMLHttpRequest.wrapFn (zone.js:1230)
    at ZoneDelegate.invokeTask (zone.js:398)
    at Zone.runTask (zone.js:165)
    at XMLHttpRequest.ZoneTask.invoke (zone.js:460)

I can't really understand why the error is keeps appearing, the application is still functional after the mistake appears but it's frustrating.

Any ideas?

Answer 1

Hi I had the same problem and I solve this downgrading to [email protected] and the problem disappeared. Run the following command in your project folder:

npm install [email protected] --save

Answer 2

for now you could do something like:

rimraf node_modules
npm cache clear
npm i [email protected]