Regex Quick Syntax Reference: Understanding and Using Regular Expressions

© Zsolt Nagy 2018

Zsolt NagyRegex Quick Syntax Referencehttps://doi.org/10.1007/978-1-4842-3876-9_11

11. Parsing HTML Code and URL Query Strings with Regular Expressions

Zsolt Nagy¹ 

(1)

Berlin, Germany

 

In this chapter, we will use JavaScript to parse an HTML document and process the query string of a URL.

Parsing HTML Tags

Exercise 1: Suppose an HTML document is given. Extract all the <td> tags using a regular expression, and print their content to the console. You can assume any content including newline characters inside the <td> tags. The <td> tags may have attributes.

Example Input:

const table = `

    <table>

        <tr>

            <td class="first">text 1</td>

            <TD>text 2</TD>

        </tr>

        <tr>

            <td>text trés</td>