split can be used to convert a string into a list. In this example, regular express \s+ is used to split at whitespace.

const foo = "data    more data   even more data"
const bar = foo.split(/\s+/)
console.log(foo)
console.log(bar)

Or you can store the delimiter in a constant.

const foo = "data    more data   even more data"
const delimiter = /\s+/
const bar = foo.split(delimiter)
console.log(foo)
console.log(bar)

Running this script should output the following.

data    more data   even more data
[ 'data', 'more', 'data', 'even', 'more', 'data' ]