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Home Web Front-end CSS Tutorial Quick Tip: Single Character Transforms with CSS and JS

Quick Tip: Single Character Transforms with CSS and JS

Feb 21, 2025 am 08:50 AM

This article demonstrates how to create a visually engaging text animation effect by individually animating characters within a sentence using CSS and JavaScript. The technique involves wrapping each character in a <span></span> tag and applying CSS animations triggered by JavaScript.

Quick Tip: Single Character Transforms with CSS and JS

Key Concepts:

  • Character-level animation: CSS animations are applied to individual characters, creating a unique effect.
  • JavaScript triggering: A JavaScript function adds an "active" class to each <span></span>, initiating the CSS animation.
  • CSS animations: The actual animation (e.g., a bounce effect) is defined using CSS @keyframes.
  • Accessibility: The article emphasizes the importance of using aria-label and aria-hidden attributes to ensure screen readers can properly interpret the text.

Implementation Steps:

  1. Include jQuery: The code relies on jQuery for DOM manipulation.

  2. HTML Structure: The HTML includes sentences with the class "sentence" and a button to trigger the animation.

    <h1><span class="sentence title"></span>Fancy Slide In Text</h1>
<h3><span class="sentence subtitle"></span>Embrace the fanciness!</h3>
<div class="button">Click to Animate</div>

  3. JavaScript (setUpCharacters): This function wraps each character of the sentences in <span> tags.

  4. JavaScript (triggerCharacters): This function adds the "active" class to each <span> with a timed delay, creating the animation sequence.

  5. CSS Animations: CSS @keyframes define the animation itself (e.g., bounceUp). The .active class selector targets the spans for animation.

    .sentence span { opacity: 0; position: relative; display: inline-block; }
.sentence span.active { animation: bounceUp 600ms ease 0ms 1 normal both; }
@keyframes bounceUp { /* ... animation definition ... */ }

  6. Button Event Listener: The JavaScript binds the triggerCharacters function to a button click.

Accessibility Considerations:

The article stresses the importance of accessibility. To make the animation accessible to screen readers, the original text is preserved using aria-label on the parent element, while individual <span></span> elements are hidden from screen readers using aria-hidden="true".

Quick Tip: Single Character Transforms with CSS and JS

The article concludes with a CodePen link demonstrating the complete code and frequently asked questions addressing common concerns about character-level animation using CSS and JavaScript. The FAQ section provides further details on animation techniques, speed control, and accessibility best practices.

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