Baseline Widely available
The Map() constructor creates Map objects.
new Map()
new Map(iterable)
Note: Map() can only be constructed with new. Attempting to call it without new throws a TypeError.
iterable Optional
An Array or other iterable object whose elements are key-value pairs. (For example, arrays with two elements, such as [[ 1, 'one' ],[ 2, 'two' ]].) Each key-value pair is added to the new Map.
const myMap = new Map([
[1, "one"],
[2, "two"],
[3, "three"],
]);
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