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JavaScript/ECMAScript

Summary

This chapter introduced the JavaScript/ECMAScript implementation of regular expressions. It covered

the two ways of declaring regular expressions, Perl-style and with the

RegExp

constructor, as well as the

various properties and methods that can be used with them.

You learned how to create many different types of regular expressions, ranging from simply using char-

acter literals to using character classes, quantifiers, and groups. Additionally, you learned advanced reg-

ular expression techniques such as alternation, lookaheads, boundaries, and multiline mode.

Finally, the chapter showed you how to use regular expressions to solve a variety of problems, including

validating dates, credit card numbers, and e-mail addresses, as well as how to remove excess white

space and superfluous HTML tags from text.

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Regular Expressions

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