How to italicize text in HTML5?

To italicize text in HTML5, you can use either the <em></em> or <i></i> tag, depending on the context and intended meaning.

Use <em></em> for Emphasis (Recommended)

The <em></em> tag is used to empty text, which typically renders in italics in browsers. It's semantically correct when you want to stress a word or phrase.

Example:

 <p>This is <em>very important</em> information.</p>

This tells both browsers and assistive technologies (like screen readers) that the word "very important" carries emphasis.

Use <i> for Stylistic or Semantic Italics

The <i> tag is appropriate for text that is conventionally styled in italics but not emphasized, such as:

• Foreign words
• Technical terms
• Thoughts or internal monologue
• Ship names

Example:

 <p>The <i lang="la">et cetera</i> should be written in italics.</p>

Here, <i></i> is used for a Latin phrase, which is a stylistic convention.

Key Differences

• <em></em> = emphasis (semantic meaning)
• <i></i> = stylistic or alternative voice (no inherent emphasis)

Best Practice

Prefer <em></em> when you're adding vocal stress or importance. Use <i></i> only when the content is meant to be in italics for reasons other than emphasis, and consider adding a lang attribute or other context when appropriate.

Basically, it's not just about looks — it's about meaning. Pick the tag that matches your intent.

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