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Xiaobian to share with you how JavaScript shorthand short circuit evaluation, I believe most people do not know how, so share this article for everyone's reference, I hope you have a lot of gains after reading this article, let's go to understand it together!

Short circuit evaluation

When assigning a variable another value, you may want to make sure that the initial value is not null, undefined, or empty. In this case, you can write an if statement with multiple conditions:

if (variable1 !== null || variable1 !== undefined || variable1 !== '') { let variable2 = variable1;}

Or you can use short-circuit evaluation:

const variable2 = variable1 || 'new';

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