Is using CSS as an HTML attribute considered poor practice?

I've been noticing an increasing trend of combining HTML, CSS, and JavaScript together in web development. However, I was taught to keep them separate with HTML linking to the sources/scripts.

While using the style attribute in HTML is sometimes acceptable, especially for email templates as discussed in this article, is it considered good practice when building websites or applications?

<div style="margin: 0 auto; width: 114px; height: 32px; text-align: center; font-family: arial; padding: 25px; border-radius: 50px; line-height: 32px; background: rgb(46, 154, 255);">Hello world</div>

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Answer №1

Avoiding inline CSS is recommended due to several reasons:

  • Reusing CSS code becomes difficult as inline styles only apply to the specific element, resulting in redundant code for styling multiple elements in a similar manner.
  • Maintaining your code will be challenging if changes need to be made, as each inline style declaration must be individually edited.
  • Overriding inline CSS properties is not straightforward, requiring the use of the !important keyword in a stylesheet to achieve higher priority.

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