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Editor to share with you how ES6 mandatory parameters, I believe that 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 understand it!

Mandatory parameter

ES6 provides a default parameter value mechanism that allows you to set default values for parameters to prevent them from being passed in when the function is called.

In the following example, we write a required () function as the default value for the parameters an and b. This means that if one of the arguments an or b does not pass a value on the call, the required () function is defaulted and an error is thrown.

Const required = () = > {throw new Error ('Missing parameter')}; const add = (a = required (), b = required ()) = > a + 3add (1) / / Error: Missing parameter. The above is all the content of the article "how to enforce parameters in ES6". 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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