build a date from string with format; example: buildDate('%mo%/%d% %h%:%min%') -> 'Dec/4 20:00'

dateBuilder.js

/**
 * @description date builder, build a date string by passing the format
 * @param {String} format date format to create
 * @param {Number} timestamp date timestamp
 * @see https://jsbench.me/j6kiav1wop other versions and benchmark
 * @example buildDate('%mo%/%d% %h%:%min%') -> 'Dec/4 20:00'
 */
buildDate = (format = '*', timestamp = Date.now()) => {
    if(!format || format == "*" || format == " "){
        return new Date(timestamp);
    }

    let d = new Date(timestamp)
    let replacers={
        '%m%':  () => d.getMonth()+1,
        '%y4%': () => d.getFullYear(),
        '%ms%': () => d.getMilliseconds(),
        '%d%':  () => d.getDate(),
        '%h%':  () => d.getHours(),
        '%min%':() => d.getMinutes(),
        '%mo%': () => d.toDateString().substr(4,3),
        '%day%':() => d.toDateString().substr(0,3),
        '%mm%': () => `${d.getMonth()+1}`.padStart(0, 2),
        '%dd%': () => `${d.getDate()}`.padStart(0, 2),
    }

    let replacable = Object.keys(replacers);
    let toReplace = format.match(/%[a-z0-9]{1,}%/gi)
    
    for (let i = 0; i<toReplace.length; i++){
        if(replacable.includes(toReplace[i])){
            format = format.replace(toReplace[i], replacers[toReplace[i]]())
        }

    }

    return format
}

buildDate('%y4%-%mo%')