Safe to Copy JSON Data: Primitive Types https://medium.com/p/c3f2783661e9

Safe to Copy JSON Data: Primitive Types.js

const safeToCopy = ["1", 2, [true]]
const goodCopy = JSON.parse(JSON.stringify(safeToCopy))
console.info(safeToCopy) // ["1", 2, [true]]
console.info(goodCopy) // ["1", 2, [true]]

// Since we're working with JSON-safe data, the deep copy is valid:

const copyDeux = JSON.parse(JSON.stringify(safeToCopy))
copyDeux[2][0] = false // Change deeply-nested [true] to [false]
console.info(safeToCopy) // ["1", 2, [true]]
console.info(copyDeux) // ["1", 2, [false]]

// The change to the "deep copy" didn't affect the original array.