SOURCE

function curry(fn,args){
    var len = fn.length
    var args = args||[]
    return function(...args2){
        let newArgs = args.concat(args2)
        return (newArgs.length<len)?curry.call(this,fn,newArgs):fn.apply(this,newArgs)
    }
}

function mulitFn(a,b,c){
    return a*b*c
}
let mulit = curry(mulitFn)
console.log(mulit(2)(3)(4))