bidi-js

import bidiFactory from 'bidi-js'; // In a Node.js environment or a browser with ESM support async function runBidiExample() { // 1. Initialize the bidi object by invoking the factory function const bidi = bidiFactory(); // Example text with mixed directions (English and Hebrew) const text = "Hello אֲנִי World, this is a test."; // Hebrew for "I" const explicitDirection = "ltr"; // Optional, if you want to force base direction console.log("Original Text:", text); // 2. Calculate bidi embedding levels for each character const embeddingLevels = bidi.getEmbeddingLevels(text, explicitDirection); const { levels, paragraphs } = embeddingLevels; console.log("Embedding Levels (Uint8Array):"); console.log(levels.join(', ')); console.log("Paragraphs:", paragraphs); // 3. Calculate character reorderings (segments to reverse) const flips = bidi.getReorderSegments(text, embeddingLevels); console.log("Reorder Flips (ranges [start, end] to reverse):", flips); // 4. Apply reordering to get the visual order of characters let reorderedTextArray = Array.from(text); flips.forEach(range => { const [start, end] = range; // Reverse the segment in place let segment = reorderedTextArray.slice(start, end + 1); segment.reverse(); reorderedTextArray.splice(start, segment.length, ...segment); }); console.log("Reordered Text (visual order): ", reorderedTextArray.join('')); // 5. Identify characters that need to be mirrored (e.g., parentheses) const mirroredCharactersMap = bidi.getMirroredCharactersMap(text, embeddingLevels); console.log("Mirrored Characters Map (index -> replacement):", Array.from(mirroredCharactersMap.entries())); } runBidiExample();