Here is a safer way to default variables in Javascript #shorts

A quick short about the nullish coalescing operator. Use it isn't of using the || fallback when possible.

#shorts

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[ananthdev]

the reason why you don't use || is because it treats 0, empty string etc as false values and will assign the default parameter to the variable, sometimes you dont want to do that and that's when null coalescing (??) comes into play as it only treats null and undefined as false values

[mikopiko]

He really made a new line just for that single param

[donnyroufs]

could also do user.skills ??= DEFAULT_SKILLS

[alexjones]

The YouTube algorithm can be so oddly specific. It REALLY wants to show me content about the nullish coalescing operator for some reason 😂

[ylovers]

Hi, have a question, you said the function takes an user object but that’s parameter and anything can come in so in this case you just assume that you know what user parameter will be?? Like data type etc.,

[Pilosofia]

by using || 0 will consider a falsy value too. this is why ?? came to adress this issue.

[damagee]

When you make a video to showcase that one method is better than another you should also explain why.

[volodymyrlomaka]

I think it is not good practice to update outter variable

[sawilliams]

const DEFAULT_SKILLS = ["javascript"];

function createUser({ skills = DEFAULT_SKILLS } = {}) {
console.log({ ...arguments[0], skills });
}

[Treklucifer]

Bro we can't see full code because your face comes in middle.Please keep it at empty spaces in the code editor.