Encoding a String to ISO-8859-1

Question

Is there a way that a can encode my string Olá to Olá in JavaScript? And do this to all accented characters.

My header looks like:

Content-Type: text/html;charset=iso-8859-1

Answer 1

If you already have a proper string, you can do it like this:

ECMAScript ≥ 6, with Emoji support

(see: https://medium.com/@giltayar/iterating-over-emoji-characters-the-es6-way-f06e4589516)

function decimalEscape(s) {
    let buffer = [];
    for(let ch of s) {
        if(ch.codePointAt(0) <= 127) {
            buffer.push(ch);
        } else {
            buffer.push('&#' + ch.codePointAt(0) + ';');
        }
    }
    return buffer.join('');
}

ECMAScript ≤ 5, without Emoji support:

function decimalEscape(s) {
    var buffer = [];
    for(var i = 0, f = s.length; i < f; ++i) {
        if(s.charCodeAt(i) <= 127) {
            buffer.push(s.charAt(i));
        } else {
            buffer.push('&#' + s.charCodeAt(i) + ';');
        }
    }
    return buffer.join('');
}

Usage:

decimalEscape("Olá"); // -> returns "Olá"

If you don't have a proper JavaScript string yet (just a bunch of bytes in some kind of buffer or if the string you have is already in the wrong encoding), you will have to fix the string first, of course.