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JavaScript does not protect the property name hasOwnProperty

D@RK$T@R answered on July 4, 2021 Popularity 2/10 Helpfulness 8/10

answer JavaScript does not protect the property name hasOwnProperty

JavaScript does not protect the property name hasOwnProperty

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// hasOwnProperty – JavaScript does not protect
var foo = {
    // overriding foo's default hasOwnProperty method
    hasOwnProperty: function() {
        return false;
    },
    bar: 'data'
};
foo.hasOwnProperty('bar'); // false always

// Hence, to prevent this, use Object.prototype.hasOwnProperty as follows-
Object.prototype.hasOwnProperty.call(foo, 'bar'); // true

Popularity 2/10 Helpfulness 8/10 Language javascript

Source: Grepper

Tags: hasownproperty javascript

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Contributed on Jul 04 2021

D@RK$T@R

0 Answers Avg Quality 2/10

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JavaScript does not protect the property name hasOwnProperty

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