Match the given string with the Regular Expression using Pattern.matcher () in Java Check if String Contains a Specific Word or Substring in JavaScript Answer1 To match a string that contains only those characters (or an empty string), try "^[a-zA-Z0-9_]*$" This works for .NET regular expressions, and probably a lot of other languages as well. Given an HTML document and the task is to select the elements with ID starts with certain characters using jQuery. The backslash symbol (\\) is used as an escape character for a single quote, double quote, backslash, tab, etc. Check if a String Contains a Specific Word jquery check if string contains specific character; noise complaint pg county; chicago and northwestern passenger trains. Check whether String contains Special Characters using JavaScript For this, use CONCAT () along with LIKE operator. jQuery :contains() Selector - W3Schools