Sometimes, we want to use an array as object keys in JavaScript.
In this article, we’ll look at how to use an array as object keys in JavaScript.
How to use an array as object keys in JavaScript?
To use an array as object keys in JavaScript, we can convert the array to a string.
For instance, we write:
const key = [1, 2, 3]
const obj = {
[JSON.stringify(key)]: 'foo'
}
console.log(obj[JSON.stringify(key)])
to create the key array.
Then we convert it to a string with JSON.stringify so we can use it as a property key.
And we set the property’s value 'foo'.
Then we can access the value with obj[JSON.stringify(key)].
Therefore, the console log should log 'foo'.
Conclusion
To use an array as object keys in JavaScript, we can convert the array to a string.
