It looks like your input cut off. I’ll assume you want to know about using a span with a custom data attribute like data-sd-animate= in HTML. Here’s a concise overview and examples.
What it is
- data- attributes: Custom attributes for storing extra information on HTML elements (valid HTML5).
- data-sd-animate: A custom attribute name; browsers ignore it by default but JavaScript/CSS can read/use it to control animations or behavior.
How to use it
- Markup example:
html
<span data-sd-animate=“fade-in”>Hello</span>- Read in JavaScript:
javascript
const el = document.querySelector(’[data-sd-animate]’);const mode = el.dataset.sdAnimate; // “fade-in”- Apply CSS via attribute selector:
css
span[data-sd-animate=“fade-in”] {opacity: 0; transform: translateY(8px); transition: opacity .4s ease, transform .4s ease;}span[data-sd-animate=“fade-in”].in-view { opacity: 1; transform: translateY(0);}- Toggle when visible (Intersection Observer):
javascript
const obs = new IntersectionObserver((entries) => { entries.forEach(e => { if (e.isIntersecting) e.target.classList.add(‘in-view’); });});document.querySelectorAll(’[data-sd-animate]’).forEach(el => obs.observe(el));Tips and considerations
- Use
dataset(camelCase) to accessdata-attributes in JS - Keep attribute values semantic (e.g., “fade-in”, “slide-left 300ms”).
- Validate or sanitize values if content comes from untrusted sources.
- Prefer CSS animations/transitions for performance; use JS only for triggering or complex sequencing.
- Avoid excessive animations for accessibility; respect
prefers-reduced-motion.
If you meant a different attribute or want examples for multiple animation types, say so and I’ll provide them.*
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