js array judgment example code

This article mainly shares with you the js array judgment example code, hoping to help everyone.

1. Check whether its constructor is an array, use constructor to judge, constructor attribute returns a reference to the array function that created this object, The code is as follows:

The running results are as follows:

2. Use instanceof to judge the code as follows:

Run result:

3. Use toString method to implement, use call to change this pointing code as follows:

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