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This article mainly shows you "JavaScript how to abbreviate mandatory parameters", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "JavaScript how to abbreviate mandatory parameters" this article.

Forced parameter

By default, if you do not pass a value to a function parameter, JavaScript sets the function parameter to undefined. Some other languages issue warnings or errors. To perform parameter assignment, you can use if statements to throw undefined errors, or you can use "force parameters".

Function foo (bar) {if (bar = undefined) {throw new Error ('Missing parameterized');} return bar;}

Abbreviated as:

Mandatory = () = > {throw new Error ('Missing parameterized');} foo = (bar = mandatory ()) = > {return bar;} these are all the contents of the article "how to abbreviate mandatory parameters for JavaScript". 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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