The Proper Method for Styling Custom HTML5 Elements with CSS
The question arises as to the most appropriate approach for applying CSS to user-defined HTML5 tags. The query involves a hypothetical tag,
The CSS Approach
The developer attempts to apply styling to this custom tag via:
<code class="css">scroll-content {
overflow: hidden;
}</code>
While this method may ostensibly function as intended, it raises doubts regarding its optimality.
Custom Elements vs. Default Stylesheet
It is imperative to comprehend that custom elements are not recognized by default within the browser's style system. The initial styling of all HTML elements originates from a predefined default stylesheet.
CSS Initial Values
Due to the absence of a pre-established definition in the default stylesheet, the custom
The Solution
To ensure proper styling, the developer should explicitly set the display property of
<code class="css">scroll-content {
display: block;
overflow: hidden;
}</code>
Conclusion
By extending this strategy to all custom elements, regardless of their origin, the developer can confidently apply CSS styling with the understanding that the initial values of undefined properties will not hinder the desired functionality.
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