TypeScript/tests/baselines/reference/narrowingTruthyObject.js at b5ef182e434efd8c768bdb4a1d04c99b24b940d1 · microsoft/TypeScript · GitHub

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//// [narrowingTruthyObject.ts]
function foo(x: unknown, b: boolean) {
    if (typeof x === 'object') {
        x.toString();
    }
    if (typeof x === 'object' && x) {
        x.toString();
    }
    if (x && typeof x === 'object') {
        x.toString();
    }
    if (b && x && typeof x === 'object') {
        x.toString();
    }
    if (x && b && typeof x === 'object') {
        x.toString();
    }
    if (x && b && b && typeof x === 'object') {
        x.toString();
    }
    if (b && b && x && b && b && typeof x === 'object') {
        x.toString();
    }
}

// Repro from #36870

function f1(x: unknown): any {
    return x && typeof x === 'object' && x.hasOwnProperty('x');
}


//// [narrowingTruthyObject.js]
"use strict";
function foo(x, b) {
    if (typeof x === 'object') {
        x.toString();
    }
    if (typeof x === 'object' && x) {
        x.toString();
    }
    if (x && typeof x === 'object') {
        x.toString();
    }
    if (b && x && typeof x === 'object') {
        x.toString();
    }
    if (x && b && typeof x === 'object') {
        x.toString();
    }
    if (x && b && b && typeof x === 'object') {
        x.toString();
    }
    if (b && b && x && b && b && typeof x === 'object') {
        x.toString();
    }
}
// Repro from #36870
function f1(x) {
    return x && typeof x === 'object' && x.hasOwnProperty('x');
}