js convert string to utf8

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// Note: Almost all JavaScript engines by default store string literals using UTF-16 encoding format.
//       By using the below function we do conversion from default encoding to UTF-8 encoding.

var toUtf8 = function(text) {
  	var surrogate = encodeURIComponent(text);
  	var result = '';
    for (var i = 0; i < surrogate.length;) {
        var character = surrogate[i];
		i += 1;
        if (character == '%') {
        	var hex = surrogate.substring(i, i += 2);
			if (hex) {
				result += String.fromCharCode(parseInt(hex, 16));
			}
        } else {
        	result += character;
        }
    }
    return result;
};


// Usage example:

const utf16Text = 'I ❤️ JS';         // I ❤️ JS
const utf8Text = toUtf8(utf16Text);  // I ❤️ JS

console.log(utf8Text);  // I ❤️ JS


// See also:
//   https://dirask.com/questions/What-encoding-uses-JavaScript-to-stores-string-jM73zD