Microsoft/TypeScript
Auf GitHub ansehenString.replace does not accept string | (string, ...any[]) => string replacer
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#22.378 geöffnet am 7. März 2018
BugDomain: lib.d.tsHelp Wanted
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Beschreibung
TypeScript Version: 2.7.2
Search Terms: String.replace overload union parameter
Code
type ReplacerFn = () => string;
type Replacer = string | ReplacerFn;
function replaceFoo(str: string, replacer: Replacer) {
return str.replace(new RegExp("foo"), replacer);
}
Expected behavior: Compiles successfully.
Perhaps the change is as simple as combining the two overloads into a union, though the implications of that change are possibly unpleasant as far as tooling is concerned.
Actual behavior:
bad.ts(5,43): error TS2345: Argument of type 'Replacer' is not assignable to parameter of type '(substring: string, ...args: any[]) => string'. Type 'string' is not assignable to type '(substring: string, ...args: any[]) => string'.
Playground Link: playground link
Related Issues: #20432 (Array.from) #20215 (new Date) #14107 (underlying issue)