Javascript replace case insensitive You can abstract it into a function as How To Replace Characters in a String JavaScript: Case-Insensitive Now, let’s see how case-insensitive replacement works by seeing its application in the example as follows: Mar 27, 2019 ยท I working on method to highlight the query text found in a string the idea is to add bold marker to each occurrence found. If you need to replace all instances of a string, you can use the . 18. txt. m Multiline mode (covered in the chapter Multiline mode of anchors ^ $, flag "m"). W3Schools offers free online tutorials, references and exercises in all the major languages of the web. g makes the regex search for all matches of the pattern. Global, case-insensitive replacement in JavaScript string replace() See the code below: var str = "I love red T-shirt. One thing that gets me about the String class is this: It's been around for a very long time and while it supports a global replace with regexp and a global replace with Strings (via CharSequences), that last doesn't have a simple boolean parameter: 'isCaseInsensitive'. match(new RegExp ('^' +s, 'i')); } And sometimes, case-sensitive is what you want. pvwxkoqmdmxparodfnfermhhvqfcdtazwywjxcorijitlpszifnmxzjkvtdhrdmtbhdbcbnvnwx