JSFiddle - React, Tailwind, and code Playground

JavaScript

var init_arr = ['small', 'big', 'big', 'medium'];

var scorer = {
    samall: 0,
    smedium: 1,
    big: 2
}

var final_arr = init_arr.sort(function(a,b) {
    return scorer[a]-scorer[b];
});

alert(final_arr);