File: typeInferenceTypePredicate.js

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node-typescript 4.8.4%2Bds1-2
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//// [typeInferenceTypePredicate.ts]
declare function f<T>(predicate: (x: {}) => x is T): T;
// 'res' should be of type 'number'.
const res = f((n): n is number => true);


//// [typeInferenceTypePredicate.js]
// 'res' should be of type 'number'.
var res = f(function (n) { return true; });