[Dart] Access HTML Data Attribute

Explain by example, if you have following element in HTML:

<div id="myDiv" data-my-demo-value="value"></div>

Access the value by dataset property:

var value = querySelector("#myDiv").dataset["myDemoValue"];

References:

[1]	HTML Global data-* Attributes - W3Schools

[2]	Getting HTML5 data-* attribute with Dart - Stack Overflow

[3]	dataset - dart:html.Element API Docs

[4]	Google search : HTML Data Attribute

[5]	[Golang] GopherJS DOM Example - Access HTML Data Attribute