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This article mainly introduces how to abbreviate the default value assignment of JavaScript, which is very detailed and has a certain reference value. Friends who are interested must read it!

Default value assignment

If the expected parameter is null or undefined, you do not need to write six lines of code to assign the default value. We can do the same thing with a single line of code using only a short logical operator.

Let dbHost;if (process.env.DB_HOST) {dbHost = process.env.DB_HOST;} else {dbHost = 'localhost';}

Abbreviated as:

Const dbHost = process.env.DB_HOST | | localhost'; above is all the contents of the article "how to abbreviate the default assignment of JavaScript". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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