Shulou(Shulou.com)06/01 Report--

Editor to share with you how to use deconstruction assignment of JavaScript function parameters. I hope you will get something after reading this article. Let's discuss it together.

Function parameters are assigned using deconstruction

When there are many parameters of a function, we tend to let the parameters accept a configuration object directly. However, we cannot set the default value when using object parameters, and we also need to access them through object parameters when using object parameters in the function body. It will be inconvenient when there are many visits or deep nesting. The above problem is solved by using deconstruction assignment in function parameters.

/ / the default value must be set for the object parameter, otherwise an error will be reported when passing the parameter const getUsers = ({offset=0, limit=1, orderBy= "salary"} = {}) = > {/ / the user data console.log ({offset, limit, orderBy}) is returned by querying the database according to the condition;} getUsers ({offset: 10, limit: 20 by: 'age'}) / / = > {offset: 10, limit: 20, orderBy: 'age'} getUsers (); / / = > {offset: 0, limit: 1, orderBy:' salary'} after reading this article, I believe you have some understanding of "how JavaScript function parameters use deconstruction assignment". If you want to know more about it, welcome to follow the industry information channel. Thank you for reading!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.