HTML-Element-Collection/tooltip-component.html at main · Shubham713-lab/HTML-Element-Collection · GitHub

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<!-- Tooltip Component (Standalone)

Files suggested:
- tooltip.js         -> exported class Tooltip
- tooltip.css        -> styles (CSS variables for customization)
- demo.html          -> demo + usage example

This single-file demo below contains HTML + CSS + JS (class based) ready to drop into the
HTML-Element-Collection repo. The component is accessible (ARIA), keyboard friendly,
customizable via options and CSS variables, and supports hover / focus / touch triggers.
-->

<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<title>Tooltip Component Demo</title>
<style>
  /* Tooltip CSS (use CSS variables to customize) */
  :root{
    --tooltip-bg: #222;
    --tooltip-color: #fff;
    --tooltip-padding: 8px 10px;
    --tooltip-radius: 6px;
    --tooltip-font-size: 13px;
    --tooltip-z: 10000;
    --tooltip-offset: 8px;
    --tooltip-transition: 160ms ease;
    --tooltip-max-width: 280px;
    --tooltip-arrow-size: 8px;
  }

  .hc-tooltip {
    position: absolute;
    display: inline-block;
    padding: var(--tooltip-padding);
    background: var(--tooltip-bg);
    color: var(--tooltip-color);
    border-radius: var(--tooltip-radius);
    font-size: var(--tooltip-font-size);
    max-width: var(--tooltip-max-width);
    box-sizing: border-box;
    z-index: var(--tooltip-z);
    pointer-events: none; /* default: non-interactive */
    opacity: 0;
    transform-origin: center;
    transform: scale(0.96);
    transition: opacity var(--tooltip-transition), transform var(--tooltip-transition);
    will-change: transform, opacity, top, left;
  }

  .hc-tooltip.show {
    opacity: 1;
    transform: scale(1);
    pointer-events: auto; /* becomes interactive when visible if allowed */
  }

  .hc-tooltip[data-placement^="top"] { transform-origin: bottom center; }
  .hc-tooltip[data-placement^="bottom"] { transform-origin: top center; }
  .hc-tooltip[data-placement^="left"] { transform-origin: right center; }
  .hc-tooltip[data-placement^="right"] { transform-origin: left center; }

  /* Arrow */
  .hc-tooltip::after{
    content: '';
    position: absolute;
    width: 0; height: 0;
    border-style: solid;
  }
  /* top */
  .hc-tooltip[data-placement^="top"]::after{
    bottom: calc(-1 * var(--tooltip-arrow-size));
    left: calc(50% - var(--tooltip-arrow-size));
    border-width: var(--tooltip-arrow-size) var(--tooltip-arrow-size) 0 var(--tooltip-arrow-size);
    border-color: var(--tooltip-bg) transparent transparent transparent;
  }
  /* bottom */
  .hc-tooltip[data-placement^="bottom"]::after{
    top: calc(-1 * var(--tooltip-arrow-size));
    left: calc(50% - var(--tooltip-arrow-size));
    border-width: 0 var(--tooltip-arrow-size) var(--tooltip-arrow-size) var(--tooltip-arrow-size);
    border-color: transparent transparent var(--tooltip-bg) transparent;
  }
  /* left */
  .hc-tooltip[data-placement^="left"]::after{
    right: calc(-1 * var(--tooltip-arrow-size));
    top: calc(50% - var(--tooltip-arrow-size));
    border-width: var(--tooltip-arrow-size) 0 var(--tooltip-arrow-size) var(--tooltip-arrow-size);
    border-color: transparent transparent transparent var(--tooltip-bg);
  }
  /* right */
  .hc-tooltip[data-placement^="right"]::after{
    left: calc(-1 * var(--tooltip-arrow-size));
    top: calc(50% - var(--tooltip-arrow-size));
    border-width: var(--tooltip-arrow-size) var(--tooltip-arrow-size) var(--tooltip-arrow-size) 0;
    border-color: transparent var(--tooltip-bg) transparent transparent;
  }

  /* Utility demo styles */
  body{font-family: system-ui, -apple-system, 'Segoe UI', Roboto, Arial; padding:40px}
  .demo-row{display:flex;gap:16px;align-items:center;flex-wrap:wrap}
  .demo-btn{padding:8px 12px;border-radius:6px;border:1px solid #ddd;background:#fff;cursor:pointer}

</style>
</head>
<body>

<h2>Tooltip Component — Demo</h2>
<p>Hover or focus the elements below to see tooltips. Tooltips are accessible (aria) and keyboard-friendly.</p>

<div class="demo-row">
  <button class="demo-btn" data-tooltip="I'm a tooltip on top" data-tooltip-placement="top">Top</button>
  <button class="demo-btn" data-tooltip="I'm a tooltip on right" data-tooltip-placement="right">Right</button>
  <button class="demo-btn" data-tooltip="I'm a tooltip on bottom" data-tooltip-placement="bottom">Bottom</button>
  <button class="demo-btn" data-tooltip="I'm a tooltip on left" data-tooltip-placement="left">Left</button>

  <a href="#" class="demo-btn" data-tooltip="Tooltip for a link\nSupports multiline and max width">Link</a>
  <input class="demo-btn" data-tooltip="Tooltip on focus" data-tooltip-delay="300" placeholder="focus me" />
</div>

<script>
/* Tooltip.js -- small, dependency-free tooltip component

Usage (auto-initialize): add attribute data-tooltip="Text" to elements.
Optional attributes on trigger element:
  - data-tooltip-placement="top|bottom|left|right" (preferred placement)
  - data-tooltip-delay="number" (ms delay before show)
  - data-tooltip-interactive (if present, allows pointer interaction with tooltip)
  - data-tooltip-id="custom-id" (id for tooltip, otherwise auto-generated)

API (if using programmatically):
  const t = new Tooltip(document.querySelector('.my-trigger'), options);
  t.show(); t.hide(); t.destroy();

Accessibility:
  - tooltip element has role="tooltip" and is referenced by aria-describedby on the trigger
  - tooltip shows on hover, focus; hides on blur, mouseleave, Escape key
*/

class Tooltip {
  constructor(trigger, options = {}){
    if (!trigger) throw new Error('Tooltip: trigger element required');
    this.trigger = trigger;
    this.options = Object.assign({
      placement: trigger.getAttribute('data-tooltip-placement') || options.placement || 'top',
      content: trigger.getAttribute('data-tooltip') || options.content || '',
      delay: parseInt(trigger.getAttribute('data-tooltip-delay')) || options.delay || 150,
      offset: parseInt(trigger.getAttribute('data-tooltip-offset')) || options.offset || 8,
      interactive: ('data-tooltip-interactive' in trigger) || options.interactive || false,
      id: trigger.getAttribute('data-tooltip-id') || options.id || `hc-tip-${Math.random().toString(36).slice(2,9)}`,
      maxWidth: options.maxWidth || '280px',
    }, {});

    // Create tooltip element
    this._createTooltipEl();

    // Bind handlers
    this._onMouseEnter = this._onMouseEnter.bind(this);
    this._onMouseLeave = this._onMouseLeave.bind(this);
    this._onFocus = this._onFocus.bind(this);
    this._onBlur = this._onBlur.bind(this);
    this._onKeyDown = this._onKeyDown.bind(this);
    this._onTouch = this._onTouch.bind(this);

    // Setup listeners
    this._addListeners();

    // State
    this._showTimer = null;
    this._visible = false;
  }

  _createTooltipEl(){
    const tip = document.createElement('div');
    tip.className = 'hc-tooltip';
    tip.id = this.options.id;
    tip.setAttribute('role', 'tooltip');
    tip.setAttribute('data-placement', this.options.placement);
    tip.style.maxWidth = this.options.maxWidth;
    tip.style.pointerEvents = this.options.interactive ? 'auto' : 'none';

    // allow HTML in data-tooltip by using innerHTML
    tip.innerHTML = this.options.content.replace(/\n/g, '<br>');

    // hide by default
    tip.setAttribute('aria-hidden', 'true');

    document.body.appendChild(tip);
    this.tip = tip;

    // link trigger to tooltip for screen readers
    this._setAria();
  }

  _setAria(){
    const described = this.trigger.getAttribute('aria-describedby');
    if (described) return; // respect existing
    this.trigger.setAttribute('aria-describedby', this.tip.id);
  }

  _addListeners(){
    this.trigger.addEventListener('mouseenter', this._onMouseEnter);
    this.trigger.addEventListener('mouseleave', this._onMouseLeave);
    this.trigger.addEventListener('focus', this._onFocus);
    this.trigger.addEventListener('blur', this._onBlur);
    this.trigger.addEventListener('keydown', this._onKeyDown);
    // touch support: toggle on touchstart
    this.trigger.addEventListener('touchstart', this._onTouch, {passive:true});

    if (this.options.interactive){
      // keep tooltip visible when pointer enters it
      this.tip.addEventListener('mouseenter', this._onMouseEnter);
      this.tip.addEventListener('mouseleave', this._onMouseLeave);
    }
  }

  _removeListeners(){
    this.trigger.removeEventListener('mouseenter', this._onMouseEnter);
    this.trigger.removeEventListener('mouseleave', this._onMouseLeave);
    this.trigger.removeEventListener('focus', this._onFocus);
    this.trigger.removeEventListener('blur', this._onBlur);
    this.trigger.removeEventListener('keydown', this._onKeyDown);
    this.trigger.removeEventListener('touchstart', this._onTouch);
    if (this.options.interactive){
      this.tip.removeEventListener('mouseenter', this._onMouseEnter);
      this.tip.removeEventListener('mouseleave', this._onMouseLeave);
    }
  }

  _onMouseEnter(){
    clearTimeout(this._showTimer);
    this._showTimer = setTimeout(() => this.show(), this.options.delay);
  }
  _onMouseLeave(){
    clearTimeout(this._showTimer);
    this.hide();
  }
  _onFocus(){
    clearTimeout(this._showTimer);
    this._showTimer = setTimeout(() => this.show(), 0);
  }
  _onBlur(){
    clearTimeout(this._showTimer);
    this.hide();
  }
  _onKeyDown(e){
    if (e.key === 'Escape' && this._visible) {
      this.hide();
      this.trigger.focus();
    }
  }
  _onTouch(e){
    // show briefly on touch (toggle)
    if (this._visible) { this.hide(); }
    else { this.show(); }
  }

  show(){
    if (!this.tip) return;
    this._visible = true;
    this.tip.classList.add('show');
    this.tip.setAttribute('aria-hidden', 'false');
    this._position();

    // update data-placement attribute after position calculation
    // (keeps arrow positioned correctly when flipped)
  }

  hide(){
    if (!this.tip) return;
    this._visible = false;
    this.tip.classList.remove('show');
    this.tip.setAttribute('aria-hidden', 'true');
  }

  _position(){
    const rect = this.trigger.getBoundingClientRect();
    const tip = this.tip;
    const placementPref = this.options.placement;
    const offset = this.options.offset || 8;

    const winW = document.documentElement.clientWidth;
    const winH = document.documentElement.clientHeight;

    // Measure tip size (ensure it's visible offscreen for measurement)
    tip.style.left = '0px';
    tip.style.top = '0px';
    tip.style.visibility = 'hidden';
    tip.classList.add('show'); // temporarily show to measure if hidden
    const tipRect = tip.getBoundingClientRect();
    tip.classList.remove('show');
    tip.style.visibility = '';

    const placements = [placementPref, 'top','bottom','right','left'];

    let chosen = placementPref;
    let top = 0, left = 0;

    for (let p of placements){
      let t = 0, l = 0;
      if (p === 'top'){
        t = rect.top - tipRect.height - offset;
        l = rect.left + (rect.width - tipRect.width)/2;
      } else if (p === 'bottom'){
        t = rect.bottom + offset;
        l = rect.left + (rect.width - tipRect.width)/2;
      } else if (p === 'left'){
        t = rect.top + (rect.height - tipRect.height)/2;
        l = rect.left - tipRect.width - offset;
      } else if (p === 'right'){
        t = rect.top + (rect.height - tipRect.height)/2;
        l = rect.right + offset;
      }
      // check if fully visible in viewport
      const fitsHoriz = (l >= 0) && (l + tipRect.width <= winW);
      const fitsVert = (t >= 0) && (t + tipRect.height <= winH);
      if (fitsHoriz && fitsVert){ chosen = p; top = t; left = l; break; }
      // otherwise keep last calculated as fallback
      chosen = p; top = t; left = l;
    }

    // Constrain to viewport with small padding
    const pad = 6;
    left = Math.min(Math.max(left, pad), winW - tipRect.width - pad);
    top = Math.min(Math.max(top, pad), winH - tipRect.height - pad);

    // apply
    tip.style.left = (left + window.scrollX) + 'px';
    tip.style.top = (top + window.scrollY) + 'px';
    tip.setAttribute('data-placement', chosen);

    // ensure visible class stays
    if (this._visible) tip.classList.add('show');
  }

  updateContent(htmlOrText){
    this.tip.innerHTML = htmlOrText;
  }

  destroy(){
    this._removeListeners();
    if (this.tip && this.tip.parentNode) this.tip.parentNode.removeChild(this.tip);
    this.tip = null;
  }
}

// Auto-initialize all elements with data-tooltip attribute
(function initAuto(){
  const els = document.querySelectorAll('[data-tooltip]');
  const instances = [];
  for (const el of els){
    try{
      instances.push(new Tooltip(el));
    }catch(e){ console.warn('Tooltip init error', e); }
  }
  // expose for debugging
  window.__hc_tooltips = instances;
})();

</script>

</body>
</html>