javascript - Create Simple Dynamic Array

var arr = [];
for(var i=1; i<=mynumber; i++) {
   arr.push(i.toString());
}

With ES2015, this can be achieved concisely in a single expression using the Array.from method like so:

Array.from({ length: 10 }, (_, idx) => `${++idx}`)

The first argument to from is an array like object that provides a length property. The second argument is a map function that allows us to replace the default undefined values with their adjusted index values as you requested. Checkout the specification here