The value to convert.
An array containing the value or the value itself if it was already an array.
const a = toArray(1) // type: number[]
console.log(a) // [1]
const b = toArray([1, 2, 3]) // type: number[]
console.log(b) // [1, 2, 3]
const itemOrItems: string | string[]
const c = toArray(itemOrItems) // type: string[]
If the value is a union of different types, the return type is still a single array.
const strOrNum: string | number
const c = toArray(strOrNum) // type: (string | number)[]
c.push('hi')
c.push(1)
Converts a value to an array it is not already one.