19 lines
382 B
JavaScript
19 lines
382 B
JavaScript
function foo():string { return null; }
|
|
|
|
function bar():?string { return null; }
|
|
|
|
function qux(x:string) { }
|
|
|
|
function corge(x:number) { }
|
|
|
|
var x = bar(); // x: ?string
|
|
if (x != null) qux(x); // x: ?string | null
|
|
if (x != null) corge(x); // x: ?string | null
|
|
|
|
function grault() { x = null; }
|
|
if (x != null) {
|
|
grault(); qux(x);
|
|
}
|
|
|
|
var array_of_nullable: Array<?number> = [null, 3];
|