To count string characters length in jQuery, use the jQuery length property to find the number of characters in a string. Follow the steps below: Create the following regular expression to check if the given string contains only special characters or not. regex = “ [^a-zA-Z0-9]+” where, [^a-zA-Z0-9] represents only special characters. In the above program, the indexOf () method is used with the if...else statement to check if a string contains a substring. The strpos () function returns the position of the first occurrence of a substring in a string. Sometimes we need extract the data that we pass to the URL as parameters. Check whether String contains Special Characters using JavaScript jQuery :contains() Selector - W3Schools 2. Using regex, we will be using java.util.regex.Matcher and java.util.regex.Pattern class. False case. check if string contains specific characters jquery check if string contains specific word. You can use four different methods to check if a string contains another word or substring. Match the given string with the Regular Expression using Pattern.matcher () in Java 2. JavaScript Program to Check Whether a String Contains a Substring To check if a string contains at least one number using regex, you can use the \d regular expression character class in JavaScript. JavaScript String Contains – How to