Javascript Regular Expressions - Replace non-numeric characters

Question

This works:

var.replace(/[^0-9]+/g, \'\');  

That simple snippet will replace anything that is not a number with nothing.

But decimals

Answer 1

Here are a couple of jQuery input class types I use:

$("input.intgr").keyup(function (e) { // Filter non-digits from input value.
    if (/\D/g.test($(this).val())) $(this).val($(this).val().replace(/\D/g, ''));
});
$("input.nmbr").keyup(function (e) { // Filter non-numeric from input value.
    var tVal=$(this).val();
    if (tVal!="" && isNaN(tVal)){
        tVal=(tVal.substr(0,1).replace(/[^0-9\.\-]/, '')+tVal.substr(1).replace(/[^0-9\.]/, ''));
        var raVal=tVal.split(".")
        if(raVal.length>2)
            tVal=raVal[0]+"."+raVal.slice(1).join("");
        $(this).val(tVal);
    } 
});

intgr allows only numeric - like other solutions here.

nmbr allows only positive/negative decimal. Negative must be the first character (you can add "+" to the filter if you need it), strips -3.6.23.333 to -3.623333

I'm putting nmbr up because I got tired of trying to find the way to keep only 1 decimal and negative in 1st position