I say this all with recognition that lodash greatly predates TS, and the maintainers have done an absolutely wonderful job in keeping up with the overall ecosystem (ESM, typings files, etc). I can't even begin to comprehend the amount of work that has gone in to keeping lodash so modern.
That being said, I wish the interaction was slightly better, since a lot of people just immediately bring in Lodash to any JS project.
[0] https://www.typescriptlang.org/docs/handbook/release-notes/t...
For example, a function which takes a property path (in the form of an array of strings) and an object as parameters and returns the value at that path inside the object still needs overloads for every single tuple length.
type Key = string | number | symbol;
function get<T, K extends keyof T>(path: [K], obj: T): T[K];
function get<T, K1 extends keyof T, K2 extends keyof T[K1]>(path: [K1, K2], obj: T): T[K1][K2];
function get<T, K1 extends keyof T, K2 extends keyof T[K1], K3 extends keyof T[K1][K2]>(path: [K1, K2, K3], obj: T): T[K1][K2][K3];
function get<T, K1 extends keyof T, K2 extends keyof T[K1], K3 extends keyof T[K1][K2], K4 extends keyof T[K1][K2][K3]>(path: [K1, K2, K3, K4], obj: T): T[K1][K2][K3][K4];
function get(path: Key[], obj: any) {
if (path.length === 0) {
return obj;
}
const key = path[0] as Key;
const rest = path.slice(1) as [Key];
return get(rest, obj[key]);
}
interface Foo {
foo: {
bar: {
baz: {
val: number;
}
}
}
}
declare const foo: Foo;
const num = get(["foo", "bar", "baz", "val"], foo);
I wish lodashy functions, and a few other things (Time?), were just integrated into JS, in a thoughtful way ... as part of the standard lib. So they could all be done in native code in the engine.
These suggestions fall apart over time because they aren’t environment agnostic and lack objectivity. The subjectivity in question, “I want feature X”, usually doesn’t take alternate positions into consideration.
Such a library would only cover features which would be useful in JavaScript in general, not things which are tied to the web platform. (A good heuristic: if something would make sense on a web browser but not in node or on embedded devices or robots, it probably isn't in scope.)
jQuery rise (but also underscore and others "low level libs) was interwined with the need of common functionalities, such as the DOM manipolation and the ajax calls. I still remember when all you could use was the .innerHTML property and the "new" DOM level 1 api [ https://www.w3.org/TR/1998/REC-DOM-Level-1-19981001/ ]. jQuery selectors were so game-changing that the "new" DOM api were basically copied.
I understand how incredibly difficult is to find a good balance between an "anemic" stdlib (like the barely sufficient c stdlib) to the giant ones (like java has had), moreso that a bad/poorly secured function should still be mantained "forever" for backward compatibility.
Still I think that this movement should go forward to finally have some form of "batteries included"
Part of me would love for TS to build one out and add shims as part of the transpilation process, but it would go miles out of the scope of what TS is trying to do. And I love that (compared to Babel) TS has no plugins and relatively few options.