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    Chapter 9. Composite Components > Required Attributes and Default Attribute Val...

    Required Attributes and Default Attribute Values

    The icon component implemented in Listing 9–1 is pretty handy. You can make icons look and behave exactly as you wish. But, we can make icons more useful by:

    • Requiring an image attribute

    • Letting the page author specify a CSS class for the image

    • Letting the page author trigger validation when an icon’s action is invoked


      

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