source: imaps-frontend/node_modules/has-proto/mutator.js@ 79a0317

'use strict';

var result = require('./')();

var test = {
        __proto__: null,
        foo: {}
};

var setter = require('dunder-proto/set');

/** @type {import('./mutator')} */
module.exports = function hasMutator() {
        if (!result) {
                return false;
        }

        var obj = { __proto__: test };
        // @ts-expect-error: TS errors on an inherited property for some reason
        if (obj.foo !== test.foo) {
                return false;
        }

        if (!setter) {
                return false;
        }

        setter(obj, null);
        if ('foo' in obj || 'toString' in obj) {
                return false;
        }
        return true;
};