Overwriting a Javascript function in Typescript

Question

I'm using Angular 5 and typescript and included the code editor codemirror into my page.

I want to overwrite a nested functionality: Codemirror.hint.function

In javascript it looks like:

Codemirror.hint.function = function(param) = {
...
}

How can I do this in typescript? Because it is nested, I can't define a simple interface.

I want to define an own autocompletion for this editor.

solved it: Codemirror specific solution: Code: stackblitz

score 1 · Accepted Answer · 2018-03-16 14:56:58Z

1

You can use this

Object.defineProperty(Codemirror.hint, 'function', {value: () => {/* your override */}});

Although I highly doubt that an object can have a function function, since it is a javascript keyword.

EDIT I don't know why or how, but the typescript definition in your blitz didn't declare CodeMirror as a global variable. Probably minification, but I won't search further.

So I added the script with a CDN in index.html, and now it works.

Here is the stackblitz.

edited Mar 16, 2018 at 14:56

answered Mar 16, 2018 at 13:39

user4676340

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12 Comments

arahfahrrad Over a year ago

Cannot find Codemirror. Should I define an interface ?

user4676340 Over a year ago

How do you access it in your Typescript component ?

arahfahrrad Over a year ago

At the moment i have no possibility to access it. Thats why I'm stuck.

user4676340 Over a year ago

declare var Codemirror: any; ?

user4676340 Over a year ago

Please post your code, I'm getting really tired of people saying they do something, while they don't, and then complain about the solution not working because they didn't do it just because they didn't like the answer. Or even better, create a stackblitz with your issue.

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