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speakHighlight.js
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speakHighlight.js
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function speakAndHighlight() {
const text = document.getElementById('letterInput').value;
const textDisplay = document.getElementById('textDisplay');
textDisplay.innerHTML = ''; // Clear previous content
const speech = new SpeechSynthesisUtterance(text);
let charIndex = 0; // To keep track of the character index
// Event listener for the 'boundary' event to highlight letters
speech.onboundary = function(event) {
if (event.name === 'word') {
const word = text.slice(event.charIndex, event.charIndex + event.charLength);
const before = text.slice(0, event.charIndex);
const after = text.slice(event.charIndex + event.charLength);
// Update the display with highlighted word
textDisplay.innerHTML = escapeHtml(before) + '<span class="highlight">' + escapeHtml(word) + '</span>' + escapeHtml(after);
}
};
window.speechSynthesis.speak(speech);
}
function escapeHtml(text) {
return text.replace(/&/g, '&').replace(/</g, '<').replace(/>/g, '>').replace(/"/g, '"').replace(/'/g, ''');
}