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This article mainly explains "es6 how to judge whether it is an array", the content of the article is simple and clear, easy to learn and understand, now please follow the editor's train of thought slowly in depth, together to study and learn "es6 how to judge whether it is an array"!

There are three judgment methods: 1. Use the "Array.isArray (array object)" statement to judge, and return true if it is an array. 2. Use the "array object. Constructor = Array" statement to determine. 3. Use the "array object instanceof Array" statement to judge.

The operating environment of this tutorial: windows7 system, ECMAScript version 6, Dell G3 computer.

Es6's method of determining whether it is an array:

Method 1: use the isArray () method

The isArray () method is used to determine whether an object is an array.

Returns true if the object is an array, false otherwise.

Var fruits = ["Banana", "Orange", "Apple", "Mango"]; console.log (Array.isArray (fruits)); if (Array.isArray (fruits)) {console.log ("is an array");} else {console.log ("not an array");}

Method 2: use the constructor attribute

Use the array object. Constructor = Array statement, return true if the array is an array, false otherwise.

Var fruits = ["Banana", "Orange", "Apple", "Mango"]; console.log (fruits.constructor = Array); if (fruits.constructor = Array) {console.log ("is an array");} else {console.log ("not an array");}

Method 3: use the instanceof operator

The instanceof operator is used to detect whether the prototype property of the constructor appears on the prototype chain of an instance object.

Var fruits = ["Banana", "Orange", "Apple", "Mango"]; console.log (fruits instanceof Array); if (fruits instanceof Array) {console.log ("is an array");} else {console.log ("not an array");}

Thank you for your reading, the above is the content of "how to judge whether es6 is an array". After the study of this article, I believe you have a deeper understanding of how to judge whether es6 is an array, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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