Integer to Roman - leetcode solution

program.js

function intToRoman(num: number): string {
    let result = '';
    let programInput = num;
    const staticValues = {
        1:'I',
        2:'II',
        3:'III',
        4:'IV',
        5:'V',
        10:'X',
        50:'L',
        100:'C',
        500:'D',
        1000:'M',
        9:'IX',
        40:'XL',
        90:'XC',
        400:'CD',
        900:'CM'
    }
    let inputLength = programInput.toString().length;
    const ranges = [...Object.keys(staticValues).map((d)=>parseInt(d)),Infinity];
    while(inputLength--){
        let temp = programInput%(Math.pow(10,inputLength));
        if(programInput-temp) rangeCalculator(programInput-temp);
        programInput = temp;
    }

    function rangeCalculator(input){
        let range;
        for(let i=0;i<ranges.length;i++){
            if(input<ranges[i]){
                range = ranges[i-1];
                break;
            }
        }
        if(input%range === 0){
            result += new Array(input/range).fill(staticValues[range]).join('');
        }else{
            result += staticValues[range];
            return rangeCalculator(input-range)
        }
    }
    
    return result;
};