JS sort() for a list of floats

Hi, I'm writing a simple code for calculating ratio of fundamentals and its partials with JS object written in Javascript and found out weird thing.

so the list function's structure would be like this:

function list(){
    myval = arrayfromargs(arguments)
    var newList;
    newList = myval.slice() //copy list

    post("received list " + myval + "\n");
    post("sorted list : " + newList.sort() + '\n')
    if(myval.length > 0){
        outlet(0, myval) //output array is same as just a variable.
        outlet(1, myval.length)
        post("list length: "+ myval.length+'\n')
    }else{
        outlet(1,0)
    }
}

as I input a list of integers such as [1, 3, 2] it prints out [1,3,2] and [1, 2, 3] (the sorted one)
but if I send [2.3 14.88, 7.83], the result in max console is:

js: received list 2.299999952316284,14.880000114440918,7.829999923706055
js: sorted list : 14.880000114440918,2.299999952316284,7.829999923706055

then outputs a list [14.88 2.3 7.83] while [zl sort] gives me well sorted one [2.3 7.83 14.88]

I know the [zl sort] works very well in this situation though, I want to know why JS gives this consequences.