2018.2

Matched element Matched element after script execution
<div id="box">
<h1>Personal information</h1>
</div>
<div id="box"style="color:red;">
<h1>Personal information</h1>
<p>Peter Parker</p>
</div>
Note: the way the functions append() and css() are used in this script is called 'chaining'.
Chaining is optional; the same could be achieved by storing the result of the query in a
variable:
var box = query("#box");
box.append("<p>Peter Parker</p>");
box.css("color","red");
attr()
Returns the value of the specified attribute of the first element in a result set, or sets the value of
the specified attribute of each element in a result set.
attr(attributeName) : String
Returns the value of the specified attribute of the first element in a result set.
attributeName
String; the name of the attribute.
Examples
This script - with the selector img - stores the source of the first image in a variable.
var src = results.attr("src");
The following script looks up an image with the ID #image1 and stores its background color in a
variable.
var imgURL = query("#image1").attr("src");
attr(attributeName, value)
Sets the value of the specified attribute of each element in a result set.
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