How to Convert Currency Strings to Doubles in Javascript?

Converting Currency Strings to Doubles in Javascript

If you have a text box containing a currency string that you need to convert to a double for calculations, here's how you can do it client-side.

To cast a currency string as a double, you must remove all non-digits and periods. Here's an example:

<code class="javascript">var currency = "-,400.50";
var number = Number(currency.replace(/[^0-9.-]+/g,""));</code>

In this example, we use the replace() method to remove all characters that are not digits, periods, or negative signs. The resulting string is then converted to a double using the Number() function.

The final result is a double value that you can use for calculations:

<code class="javascript">// Result: ,400.50
console.log(number);</code>

This technique allows you to seamlessly convert currency strings to doubles without compromising user input.

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