Extract number with decimals in string (Javascript)

This worked for me when I tried:

var value = 'COMC120DI';
alert(value.match(/[\d\.]+/g)[0]);    

This returned "120". If you have multiple numbers in your string, it will only return the first. Not sure if that's what you want. Also, if you have multiple decimal places, it'll return those, too.

This is how I extracted numbers (with decimal and colon) from a string, which will return numbers as an array.

In my case, it had undefined values in the result array so I removed it by using the filter function.

let numArr = str.match(/[\d\.\:]+/g).map(value => { if (value !='.' && value !=':'){ return value } })
    numArr = numArr.filter(function( element ) {
        return element !== undefined;
});

You could try this snippet.

var match = text.match(/\d+(?:\.\d+)?/);
if (match) {
    var result = 'Found ' + match[0] + ' on position ' + match.index + ' to ' + (match.index + match[0].length));
}

Note that the regex I'm using is \d+(?:\.\d+)?. It means it won't mistakenly check for other number-and-period format (i.e., "2.3.1", ".123", or "5.") and will only match integers or decimals (which is \d+ with optional \.\d+.

Check it out on JSFiddle.

For extraction u can use this RegEx:

^(?<START>.*?)(?<NUMBER>[0-9]{1,}((\.|,)?[0-9]{1,})?)(?<END>.*?)$

The group "START" will hold everything before the number, "NUMBER" will hold any number (1| 1,00| 1.0) and finally "END" will hold the rest of the string (behind the number). After u got this 3 pieces u can calculate the start and end position.

   var decimal="sdfdfddff34561.20dfgadf234";

   var decimalStart=decimal.slice(decimal.search(/(\d+)/));
   var decimalEnd=decimalStart.search(/[^.0-9]/);
   var ExtractedNumber= decimalStart.slice(0,decimalEnd);

   console.log(ExtractedNumber);

shows this in console: 34561.20