CODEWITHSUNDEEP
javascript
Joshiepillow
Joshiepillow

Reputation: 227

Storing variable in function?

I made a typo in my code but it somehow still works.

let stuffs = [];
function stuff(thing) {
  stuff[0] = thing; // should be stuffs[0] = thing;
}
stuff("item");

I expected to get an error but somehow it still works. You can even get "item" with stuff[0]. What is going on here? Should I use this?

Upvotes: 0

Views: 78

Answers (1)

Jorge Fuentes González
Jorge Fuentes González

Reputation: 11809

In JavaScript almost everything that has a structure inherits from Object.

In JavaScript objects can have any property.

With this statements you can see that a function is an object actually, so you can set all the properties that you want to it, just like a simple {} (with small limitations, as functions have another set of properties that plain objects don't have).

With this snippet you can check that functions inherit from Object.

function myFunc() {
    // empty! :-)
}

console.log("Func inherits from Object:", myFunc instanceof Object);
console.log("Array inherits from Object:", [] instanceof Object);
console.log("Object inherits from Object:", {} instanceof Object);
console.log("constant string inherits from Object:", "test" instanceof Object);
console.log(" * constant string DON'T inherits from Object but...");
console.log("String constructor inherits from Object:", String instanceof Object);

Upvotes: 3

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