Convert Percent Into A Decimal In Html/ Javascript

Javascript: var validate(s) = s.match ^( 100(?:\.0{1,2})? | 0*?\.\d{1,2} | \d{1,2}(?:\.\d {1,2})? )% $ != null; var str = value.match(/\/\/%//g); if(converted==NaN

Solution 1:

So you have a string like: 50%? How about:

var percent = "50%";
var result = parseFloat(percent) / 100.0;

Solution 2:

If you use parseFloat, it will read the string up until the first non-number character (the %)

var x = '20.1%';
var y = parseFloat(x); // 20.1

Then you can check if it's NaN, and convert it.

if(!isNaN(y)){
    y /= 100; // .201
)

Note: You need to use isNaN because NaN === NaN is false (JavaScript is weird).

UPDATE: I see you also have fracToDecimal in there. You don't need eval for that. Just do a simple split.

var frac = '1/2';
var nums = frac.split('/');
var dec = nums[0]/nums[1];

Solution 3:

Assuming the "%" is on the right hand of the string, just use parseFloat(s)/100

http://jsfiddle.net/TrCYX/1/