JavaScript Regular Expression Patterns
The pattern can be a combination of characters, operators, and quantifiers.
- Characters: The pattern can include any character.
- Operators: The pattern can include operators that match specific patterns. For example, the . operator matches any character.
- Quantifiers: The pattern can include quantifiers that match a specific number of characters. For example, the * quantifier matches zero or more characters.
Matching a Specific String
To match a specific string, simply specify it in the regular expression.
let regex = /apple/;Matching Multiple Options
You can use the pipe character | to match multiple options.
let regex = /apple|banana/;This regex will match either “apple” or “banana.”
Matching Any Character
The dot . in a regular expression matches any character except a newline.
let regex = /a./;This regex will match “ab,” “ac,” “ad,” and so on.
Here are some examples of JavaScript regular expressions:
/[a-z]/ // Matches any lowercase letter.
/[0-9]/ // Matches any digit.
/./ // Matches any character.
/\d+/ // Matches one or more digits.
/\w+/ // Matches one or more word characters.