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Allow Boolean() to be used to perform a null check (#29955)

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* Allow Boolean() to be used to perform a null check

* Add missing test case output
This commit is contained in:
Forbes Lindesay
2019-04-30 08:09:31 -07:00
committed by Ryan Cavanaugh
parent be409fad84
commit 3ce3cde493
5 changed files with 124 additions and 1 deletions
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src/lib/es5.d.ts
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+1 -1
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@@ -513,7 +513,7 @@ interface Boolean {
interface BooleanConstructor {
new(value?: any): Boolean;
(value?: any): boolean;
<T>(value?: T): value is Exclude<T, false | null | undefined | '' | 0>;
readonly prototype: Boolean;
}