Question

I’ve retrieved a string into a variable with innerHTML method. The string is:

£ 125.00
<!-- End: pagecomponent/pricesplit -->

I only want the 125.00 part. Is it possible to use the parseInt() method to convert this into an integer? Alternatively what can I do to extract the 125.00 part?

Thanks

Answer 1

You probably want to use a regular expression to remove anything but digits and periods, and then run parseInt on the remaining string:

parseInt(yourString.replace(/[^\d.]/g, ''), 10);

Test the regex here. Here’s a breakdown:

/.../ is just the syntax you use for wrapping a regular expression. Ignore these.

[...] creates a character class.

^ when placed at the beginning of a character class, it negates everything inside.

\d any digits

. a literal period. It does not need to be escaped inside a character class – outside it would mean “any character” and need to be escaped.

So /[^\d.]/ means “match anything that is not a digit or period”, and subsequently replace it with an empty string.

If your number might include significant digits after the decimal, such as 125.50, you should use parseFloat instead of parseInt.