I’ve been coding Javascript for 20 years and every day I discover something new about the language.
Today I discovered this:
const key = 'hello'const things = { [key]: 'world' }==> things is { hello: ‘world’ }
Why is this useful?
Up until now I’ve been doing this instead
const key = 'hello'const things = {}things[key] = 'world'
Why would I do that?
const inject = (key, val, other = {}) => { ...other, [key]: val }is a lot neater than
const inject = (key, value, other = {}) => { const result = { ...other } result[key] = value return result}
Obviously this is a trivial and mostly pointless example but the general idea of being able to inject a dynamic key into an object is pretty damn powerful and I’ve been doing it the long way around since forever.
Read more about Computed property names.
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