Issue on JSON.stringify (lib.es5.d.ts)

[bwlt]

TypeScript/lib/lib.es5.d.ts

Line 1066 in 7f1df6e

stringify(value: any, replacer?: (this: any, key: string, value: any) => any, space?: string | number): string;

TypeScript/lib/lib.es5.d.ts

Line 1073 in 7f1df6e

stringify(value: any, replacer?: (number | string)[] | null, space?: string | number): string;

The signature of this functions are not correct. If passing undefined as an argument this function can return undefined.
On the above definitions the return type is always type string.

see mdn:

undefined, Functions, and Symbols are not valid JSON values. If any such values are encountered during conversion they are either omitted (when found in an object) or changed to null (when found in an array). JSON.stringify() can return undefined when passing in "pure" values like JSON.stringify(function(){}) or JSON.stringify(undefined).

[AviVahl]

#18879

[typescript-bot]

This issue has been marked as a 'Duplicate' and has seen no recent activity. It has been automatically closed for house-keeping purposes.