37 lines
1.3 KiB
JavaScript
37 lines
1.3 KiB
JavaScript
export function isPromiseMethod(x) {
|
|
if (x === "then" || x === "catch" || x === "finally") {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
export function isKVMap(x) {
|
|
if (typeof x !== "object" || x == null) {
|
|
return false;
|
|
}
|
|
const prototype = Object.getPrototypeOf(x);
|
|
return ((prototype === null ||
|
|
prototype === Object.prototype ||
|
|
Object.getPrototypeOf(prototype) === null) &&
|
|
!(Symbol.toStringTag in x) &&
|
|
!(Symbol.iterator in x));
|
|
}
|
|
export const isAsyncIterable = (x) => x != null &&
|
|
typeof x === "object" &&
|
|
// eslint-disable-next-line @typescript-eslint/no-explicit-any
|
|
typeof x[Symbol.asyncIterator] === "function";
|
|
export const isIteratorLike = (x) => x != null &&
|
|
typeof x === "object" &&
|
|
"next" in x &&
|
|
typeof x.next === "function";
|
|
const GeneratorFunction = function* () { }.constructor;
|
|
export const isGenerator = (x) =>
|
|
// eslint-disable-next-line no-instanceof/no-instanceof
|
|
x != null && typeof x === "function" && x instanceof GeneratorFunction;
|
|
export const isThenable = (x) => x != null &&
|
|
typeof x === "object" &&
|
|
"then" in x &&
|
|
typeof x.then === "function";
|
|
export const isReadableStream = (x) => x != null &&
|
|
typeof x === "object" &&
|
|
"getReader" in x &&
|
|
typeof x.getReader === "function";
|