Convert accented Unicode characters to non-accented in JavaScript

A guide on how to convert accented Unicode characters in the Vietnamese alphabet to non-accented letters using JavaScript's normalize method. This JavaScript code efficiently handles Vietnamese text processing.

Here’s the JavaScript code to convert all accented Vietnamese letters to non-accented letters:

function removeVietnameseAccents(str) {
    return str.normalize('NFD')  // Decompose letters and accents
              .replace(/[\u0300-\u036f]/g, '')  // Remove accents
              .replace(/đ/g, 'd')  // Convert đ to d
              .replace(/Đ/g, 'D');  // Convert Đ to D
}

// Example usage
const originalStr = "Chào bạn! Hôm nay trời rất đẹp. Đừng quên mang ô nhé.";
const resultStr = removeVietnameseAccents(originalStr);
console.log(resultStr);  // Output: "Chao ban! Hom nay troi rat dep. Dung quen mang o nhe."

Detailed Explanation:

1. normalize('NFD'):

   • The normalize method breaks down characters and their accents (NFD form), for example, á becomes a and the accent '.

2. replace(/[\u0300-\u036f]/g, ''):

   • This regular expression matches and removes all diacritics in the Unicode range \u0300 to \u036f, covering accents like acute, grave, circumflex, etc.

3. replace(/đ/g, 'd'):

   • Converts the đ character to d.

4. replace(/Đ/g, 'D'):

   • Converts the Đ character to D.

5. const resultStr = removeVietnameseAccents(originalStr);:

   • Calls the function to convert the accented Vietnamese string to non-accented.

6. console.log(resultStr);:

   • Outputs the converted string to the console.

JavaScript Version:

The code is compatible with modern JavaScript versions (ES6 and later). The normalize method is supported in modern browsers like Chrome, Firefox, Edge, and Safari.