June 2017
Intermediate to advanced
873 pages
18h 9m
English
Content preview from Dart: Scalable Application DevelopmentBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Extending DOM elements
Instead of making a new Polymer component from scratch, as we did in the previous recipes, you can also start from a native HTML element and build upon that. This is made possible because our component is backed up by a class that can inherit the properties and behavior of an existing HTML element class. For our example, we will extend a Div element. You can find the code in the project dom_extend.
How to do it...
- The script starts with
web\index.html, where a component with the namedom-extendis imported through the following line:<link rel="import"href="dom_extend.html">
From this, we know that the component is defined in
dom_extend.html, and the code behind it is in a file nameddom_extend.dart. For a discussion of the ...
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