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JavaScript does not protect the property name hasOwnProperty Code Example
JavaScript does not protect the property name hasOwnProperty 
// 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



Javascript

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Type:
 Code Example
Category:
 Coding
Sub Category:
 Code Example
Uploaded by:
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