How do you convert JSON to an ES6 Map?

Question

I'm trying to convert JSON of the form:

{1: 1, 4: -1}

to a Map where the keys are of type integer.

I managed to do this:

  let myMap = new Map(Object.entries(payload));

but it ends up converting the keys to strings.

What am I doing wrong?

Answer 1

You can convert the strings to numbers.

const myMap = new Map(Object.entries(payload).map(([k, v]) => ([+k, v]) ));