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This article focuses on "how to use the properties of hasOwnProperty in js". Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to use the properties of hasOwnProperty in js.

1. Js does not protect hasOwnProperty from being illegally occupied. If an object happens to have this property, you need to use an external hasOwnProperty function to get the correct result.

2. HasOwnProperty is the only method available when checking whether a property exists on an object.

Example

Var foo = {hasOwnProperty: function () {return false;}, bar: 'Here be dragons'}; foo.hasOwnProperty (' bar'); / / always returns false// using the hasOwnProperty of other objects and sets its context to foo ({}) .hasOwnProperty.call (foo, 'bar') / / true at this point, I believe you have a deeper understanding of "how to use the properties of hasOwnProperty in js". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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