variable name with index js code example

Example 1: dynamic loop variable .each create hash javascript

for (var i = 0; i < coords.length; ++i) {
    this["marker"+i] = "some stuff";
}

Example 2: how i can add dynamic value in string in javascript

const poem = "The Wide Ocean";
const author = "Pablo Neruda";

const favePoem = `My favorite poem is ${poem} by ${author}.`;