JSFiddle - React, Tailwind, and code Playground

JavaScript

var xArray = ['x1','x2','x3','x4'],
    yArray = ['y1','y2','y3','y4'];

var points = xArray.map(function(itm, i) {
    return [itm, yArray[i]];
});

console.log(JSON.stringify(points))

//points = [[x1,y1],[x2,y2],[x3,y3]]