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Editor to share with you JavaScript how to verify whether the parameters are an array, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

Verify that the parameter is an array function isArray (obj) {return Object.prototype.toString.call (obj) = ='[object Array]';}

Note: if the toString () method is overridden (overridden), you won't be able to get the results you want using this technique. Or you can use:

Array.isArray (obj); / / this is a new array method

If you are not using multiple frames, you can also use the instanceof method. But if you have multiple contexts, you will get the wrong results.

Var myFrame = document.createElement ('iframe'); document.body.appendChild (myFrame); var myArray = new myArray [window.frames.length-1] .Array; var arr = new myArray (aforme BL10) / / instanceof will not work correctly, myArray loses his constructor// constructor is not shared between framesarr instanceof Array; / / false above is all the contents of the article "how to verify whether the parameters are arrays or not". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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