Question

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What does “options = options || {}” mean in Javascript?

Hi I am not so good with javascript. I have searched all over the place and didn’t find anything which relates to my query.

I’ve been seeing a lot of this lately and a bit curious what does this mean?

someValue || {} in javascript?

Thank you much for you help!

Answer 1

If someValue‘s value is falsy like:

• null
• false
• empty string
• 0
• undefined

then someValue defaults to an object {}.

The || used this way is also known as “default”, meaning that if the value to the left of a || is falsy, it “defaults” to the value at the right.