Avoid the non-primitive Number
, String
, Boolean
, Object
, and Symbol
types in TypeScript.
All of them refer to non-primitive reference types.
Instead, prefer the corresponding primitive types.
let textToCheck: String = 'text';
console.log(typeof textToCheck); // 'string'
console.log(textToCheck === 'text'); // true
textToCheck = new String('text');
console.log(typeof textToCheck); // 'object'
console.log(textToCheck === 'text'); // false
It's easy to failed your equality check with them.
There is also a performance part that I will not detail here. I recommend this article from mozilla which makes a performance comparison between a literal string and its object version in JavaScript.
That's it, make good use of it !
I'm not a native English speaker so, thanks in advance if you want to improve my article with correct syntax/grammar/sentences.
I can accept all kind remarks :)
Cover by JC Dela Cuesta on Unsplash
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