flatMap()
ES2019+Returns a new array formed by applying a given callback function to each element of the array, then flattening the result by one level.
Syntax
array.flatMap(callback(element, index, array), thisArg)Parameters
callback Function Function that produces an element of the new Array
Return Value
Array
A new array with mapped and flattened elements
Examples
JavaScript
const sentences = ['Hello World', 'How are you'];
const words = sentences.flatMap(s => s.split(' '));
console.log(words);Output:
// ['Hello', 'World', 'How', 'are', 'you']