Web-Development-Applications Exam Dumps : WGU Web Development Applications (KVO1)

The pattern attribute in the element is used to specify a regular expression that the input's value must match for it to be considered valid. The given pattern -?\d{1,3}\.\d+ matches strings that represent decimal numbers with an optional negative sign, typically used for latitude and longitude values.

Pattern Explanation:

-? allows for an optional negative sign.

\d{1,3} matches one to three digits.

\. matches a literal dot.

\d+ matches one or more digits.

Usage Example:

This pattern ensures the input matches the format of latitude/longitude values.

References:

MDN Web Docs on pattern attribute

Regular Expressions Documentation