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(function () { |
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'use strict'; |
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|
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var reducedMotion = window.matchMedia && window.matchMedia('(prefers-reduced-motion: reduce)').matches; |
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|
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function initAnimatedText(el) { |
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var rawWords = el.getAttribute('data-words'); |
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var words; |
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try { words = JSON.parse(rawWords); } catch (e) { return; } |
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|
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if (!words || words.length < 1) return; |
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|
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var effect = el.getAttribute('data-effect') || 'typewriter'; |
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var typingSpeed = parseInt(el.getAttribute('data-typing-speed'), 10) || 80; |
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var deletingSpeed = parseInt(el.getAttribute('data-deleting-speed'), 10) || 40; |
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var pause = parseInt(el.getAttribute('data-pause'), 10) || 2000; |
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var loop = el.getAttribute('data-loop') !== '0'; |
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var showCursor = el.getAttribute('data-cursor') !== '0'; |
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var cursorChar = el.getAttribute('data-cursor-char') || '|'; |
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|
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var wordText = el.querySelector('.bkbg-at-word-text'); |
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var cursorEl = el.querySelector('.bkbg-at-cursor'); |
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|
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if (!wordText) return; |
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|
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// If reduced motion — just show first word statically |
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if (reducedMotion) { |
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wordText.textContent = words[0] || ''; |
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if (cursorEl) cursorEl.remove(); |
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return; |
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} |
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|
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var currentIndex = 0; |
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|
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if (effect === 'typewriter') { |
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// ── Typewriter engine ───────────────────────────────────────────── |
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var currentText = ''; |
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var isDeleting = false; |
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var isPaused = false; |
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|
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function tick() { |
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var word = words[currentIndex] || ''; |
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if (isDeleting) { |
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currentText = word.substring(0, currentText.length - 1); |
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} else { |
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currentText = word.substring(0, currentText.length + 1); |
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} |
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|
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wordText.textContent = currentText; |
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|
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var nextDelay; |
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|
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if (!isDeleting && currentText === word) { |
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// Finished typing — pause then delete |
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if (!loop && currentIndex === words.length - 1) return; // stop at last word |
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nextDelay = pause; |
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isDeleting = true; |
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} else if (isDeleting && currentText === '') { |
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// Finished deleting — move to next word |
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isDeleting = false; |
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currentIndex = (currentIndex + 1) % words.length; |
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nextDelay = 200; |
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} else { |
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nextDelay = isDeleting ? deletingSpeed : typingSpeed; |
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// Natural randomness |
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nextDelay += Math.floor(Math.random() * 30) - 15; |
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if (nextDelay < 5) nextDelay = 5; |
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} |
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|
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setTimeout(tick, nextDelay); |
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} |
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|
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// Start after a brief initial delay |
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setTimeout(tick, 600); |
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|
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} else { |
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// ── CSS animation cycling ───────────────────────────────────────── |
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var animDuration = 350; // ms — matches CSS animation durations |
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|
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function showWord(index) { |
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wordText.textContent = words[index]; |
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el.classList.remove('is-leaving'); |
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el.classList.add('is-entering'); |
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|
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// Remove entering class after animation |
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setTimeout(function () { |
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el.classList.remove('is-entering'); |
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}, animDuration); |
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} |
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|
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function nextWord() { |
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// Trigger leave animation |
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el.classList.add('is-leaving'); |
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|
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setTimeout(function () { |
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// Advance index |
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if (!loop && currentIndex === words.length - 1) { |
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el.classList.remove('is-leaving'); |
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return; // stop |
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} |
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currentIndex = (currentIndex + 1) % words.length; |
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showWord(currentIndex); |
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}, animDuration); |
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} |
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|
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// Show first word (no animation on first) |
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showWord(0); |
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|
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// Start cycling |
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if (words.length > 1) { |
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setInterval(nextWord, pause + animDuration * 2); |
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} |
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} |
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} |
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|
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function init() { |
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var elements = Array.prototype.slice.call(document.querySelectorAll('.bkbg-at-animated-word')); |
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elements.forEach(function (el) { |
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if (el.getAttribute('data-words')) { |
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initAnimatedText(el); |
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} |
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}); |
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} |
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|
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if (document.readyState === 'loading') { |
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document.addEventListener('DOMContentLoaded', init); |
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} else { |
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init(); |
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} |
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})(); |
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