Using regex to confirm prices are accurate

Can anyone assist me with validating input using regEx in Vue? I'm struggling to create one and haven't been able to find the correct pattern online for what I need.

The specific validation I am attempting is for a price value that should be a float with 2 decimal places. It can have either 1 digit before the decimal point, or up to 9 digits. For example:

0.50

1.00

99999.99

999999999.00

I attempted the following regEx pattern:

v => (/\d{1,3}(?:[.,]\d{3})*(?:[.,]\d{2})/.test(v))

However, it did not work as expected.

Please excuse any language barriers as English is not my native language. Any help would be greatly appreciated!

javascriptregexvue.js

Answer №1

If you need to find a pattern with 1-9 digits before the dot, followed by 2 decimal numbers, you can use the following regular expression:

^\d{1,9}\.\d{1,2}$

For a demonstration and testing of this regex pattern, check out this demo on regex101.

Answer №2

What are you looking for? How can we validate a number ranging from 0 to 999999999 in the whole number part with no more than 2 decimal places?

A guideline considering that the entire input string is checked from start (^) to finish ($), containing:

  • a required initial section, starting either with 0 or comprising of 1 to 9 digits (excluding leading zeroes);

  • an optional ending with a period and two digits:

    ^([1-9]\d{0,8}|0)(.\d{1,2})?$

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