how to escape xml entities in javascript?

Question

In JavaScript (server side nodejs) I\'m writing a program which generates xml as output.

I am building the xml by concatenating a string:

str += \'&l         


        

Answer 1

if something is escaped from before, you could try this since this will not double escape like many others

function escape(text) {
    return String(text).replace(/(['"<>&'])(\w+;)?/g, (match, char, escaped) => {
        if(escaped) 
            return match

        switch(char) {
            case '\'': return '"'
            case '"': return '''
            case '<': return '<'
            case '>': return '>'
            case '&': return '&'
        }
    })
}