需要JavaScript函数的参数

逃离我推掉我的手 2023-02-22 03:34 2阅读 0赞

JavaScript is notorious for being "loose", something that some developers love but other developers loathe.  I hear most of those complaints from server side developers, who want string typing and syntax.  While I like strict coding standards, I also like that JavaScript lets me quickly prototype without having to cross the I's and dot the T's.  Until recently you couldn't define default parameter values for functions in JavaScript, but now you can!

JavaScript因其“松散”而臭名昭著，有些开发人员喜欢它，而其他开发人员则讨厌。 我听到来自服务器端开发人员的大多数抱怨，他们想要字符串输入和语法。 虽然我喜欢严格的编码标准，但我也喜欢JavaScript，它使我可以快速制作原型，而不必跨越I和加点T。 直到最近，您还无法为JavaScript中的函数定义默认参数值，但是现在您可以了！

When I posted last week about [Six Tiny but Awesome ES6 Features][Six_Tiny but Awesome ES6 Features], an awesome reader ([cmwd][]) pointed out that you can not only set default function parameter values but you can throw errors when a given parameter isn't provided to a function:

当我上周发布有关“ [六种小巧但很棒的ES6功能”时][Six_Tiny but Awesome ES6 Features] ，一位很棒的读者( [cmwd][] )指出，您不仅可以设置默认的函数参数值，而且在未向函数提供给定参数时也可能引发错误：

I love this tip -- it shows how with each addition to JavaScript we can stretch the language to do interesting things.  How practical it is to throw errors in production is up to you but this is an awesome ability during development.  Happy coding!

我喜欢这个技巧-它显示了JavaScript的每一项添加如何使我们能够扩展语言以执行有趣的事情。 在生产中引发错误的实际程度取决于您，但这是开发过程中的出色能力。 编码愉快！

> 翻译自: [https://davidwalsh.name/javascript-function-parameters][https_davidwalsh.name_javascript-function-parameters]

[Six_Tiny but Awesome ES6 Features]: https://davidwalsh.name/es6-features
[cmwd]: http://cmwd.github.io/
[https_davidwalsh.name_javascript-function-parameters]: https://davidwalsh.name/javascript-function-parameters