How to Parse a String with Comma Thousands Separators in JavaScript?

Parsing a String with Comma Thousands Separator to a Number

When faced with a string containing a comma thousands separator, such as "2,299.00," parsing it into a number can pose a challenge. Using parseFloat fails due to the presence of the comma.

Solution: Removing the Comma

The simplest and most effective solution is to remove the commas altogether. JavaScript provides the replace() method, which can be used to replace the commas with an empty string (''):

let output = parseFloat("2,299.00".replace(/,/g, ''));
console.log(output);

By replacing each comma with an empty string, we remove the thousands separator and successfully parse the string into the desired number: 2299.

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