Char to Hex in javascript

Question

Could anyone guide me on how to convert char to hex in javascript?

For example:

\"入力されたデータは範囲外です。\"
to
\"\\u5165\\u529B\\u3055\\

Answer 1

function string_as_unicode_escape(str){
    return str.split("").map(function(s){
        return "\\u"+("0000" + s.charCodeAt(0).toString(16)).slice(-4);
    }).join("");
}