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This article will explain in detail how JavaScript uses the Object.prototype.call () method. The editor thinks it is very practical, so I share it for you as a reference. I hope you can get something after reading this article.

Use the Object.prototype.call () method

All objects in JS inherit properties from the main prototype object, which is named Object.prototype. There is a toString () method in Object.prototype, which is why each object has its own toString () method, and the toString () method of Object.prototype shows the type of object.

The object's call () method executes a function, but changes the this value to the object passed in parameters, for example, it allows one object to use the methods of another object.

Therefore, we can use Object.prototype.toString () to print the type, then use call () to process another object, and then compare the string value to determine whether it is an array.

Let result = {subject: "Science", marks: 97}; let numbers = [1,2,3,4,5]; let name = "Mark"; let names = new Array ("Xiao Zhi", "Xiao Li", "Xiao Wu"); console.log (Object.prototype.toString.call (result)); / / [object Object] console.log (Object.prototype.toString.call (numbers)); / / [object Array] console.log (Object.prototype.toString.call (name)) / / [object String] console.log (Object.prototype.toString.call (names)); / / [object Array] console.log (Object.prototype.toString.call (result) = = "[object Array]"); / / falseconsole.log (Object.prototype.toString.call (numbers) = "[object Array]"); / / trueconsole.log (Object.prototype.toString.call (name) = "[object Array]") / / falseconsole.log (Object.prototype.toString.call (names) = = "[object Array]"); / / true's article on "how to use the Object.prototype.call () method in JavaScript" ends here. I hope the above content can be helpful to you so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

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