Easily Use Regular Expressions in Your JavaScript Source Code

JavaScript (also known as JScript or ECMAScript) has built-in support for regular expressions. If you use JavaScript to validate user input on a web page at the client side, using JavaScript’s regular expression support will greatly reduce the amount of code you need to write. RegexBuddy makes it very easy to use the RegExp object in your JavaScript source code and web pages.

RegexBuddy supports standards-compliant JavaScript as implemented by the latest versions of Chrome, Firefox, and Edge. It also supports JavaScript as implemented by Internet Explorer in standards mode and in quirks mode. RegexBuddy is aware of all the differences and incompatibilities. It can tell you if any of those may affect your regex when you compare your regular expression between these JavaScript flavors.

RegexBuddy can also emulate two specific legacy versions of Firefox. Firefox 12, released in 2012, is the last version to support Windows 2000. Firefox 52, released in 2017, is the last version to support Windows XP and Windows Vista. These regex flavors, along with the MSIE flavors, can be useful when porting old JavaScript code to modern browsers.

If that wasn’t enough, RegexBuddy can also emulate the changes that the XRegExp library makes to the regexp syntax in both modern browsers and the legacy browsers that RegexBuddy supports. In the past, XRegExp was very useful for working around cross-browser inconsistencies and adding some missing features to the regexp syntax. Today this library is obsolete. But RegexBuddy still supports it so you can test what will happen if you remove the dependency on XRegExp from your JavaScript code.

See How Easy Coding with Regexes Can Be

First, use RegexBuddy to define a regex or retrieve a regexp saved in a RegexBuddy library. Rely on RegexBuddy’s clear regex analysis, which is constantly updated as you build the pattern, rather than dealing with the cryptic regex syntax on your own. Detailed help on that syntax is always only a click away.

If you copied a regex written for another programming language, simply paste it into RegexBuddy, select the original language, and then convert the regex to JavaScript’s regex flavor. You can also convert from a legacy JavaScript version to the current standards.

If you created a new regular expression, test and debug it in RegexBuddy before using it in your JavaScript source code. Test each regex in RegexBuddy’s safe sandbox without risking precious data. Quickly apply the regex to a wide variety of input and sample data, without having to produce that input through your script.

Finally, let RegexBuddy generate a source code snippet that you can copy and paste directly into your JavaScript code editor. Just choose what you want to use the regex for, and a fully functional code snippet is ready. You can change the names of variables and parameters to suit your naming style or the current situation, which RegexBuddy automatically remembers.

Don’t bother trying to remember JavaScript’s specific regexp syntax. And don’t worry about properly escaping backslashes and other characters. Just tell RegexBuddy what you want to do, and you will get the proper JavaScript code straight away. Anything can be done: testing a string for a match, extracting search matches, validating input, search-and-replace, splitting a string, etc.

Let RegexBuddy Make Regex Easy for You

• Discover how you can automate tedious tasks with regular expressions.
• Find out how RegexBuddy makes the regex syntax crystal clear enabling you to use regular expressions with the greatest ease ever.
• Watch videos in your web browser and see what RegexBuddy can do for you.
• Take a look at the screen shots.
• Buy RegexBuddy now and try it risk-free with our 3-month unconditional money-back guarantee.