CSS selectors

<html lang="en">

<head>
  <title>CSS Selectors</title>
  <link rel="stylesheet" href="style.css">
</head>

<body>
  <h1 id="select-me">
    <a href="#click-me">Click me.</a>
  </h1>
<body>
</html>

With a CSS selector, you must specify which attribute you want returned, since there may be several.

capture:
  selector: '#select-me > a'
  attr: [ href ]
  as: [ link ]

The above HTML would be parsed by the given expression as the string

#click-me

which would then be stored in the link variable.