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This article mainly introduces what is the abbreviation of JavaScript short circuit evaluation, which has a certain reference value. Interested friends can refer to it. I hope you will gain a lot after reading this article. Let's take a look at it.

Shorthand method of short circuit evaluation

When assigning another value to a variable, you want to make sure that the source value is not null,undefined or null. You can write an if statement with multiple conditions.

Or you can use the short-circuit evaluation method:

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