Question

In Javascript '\uXXXX' returns in a unicode character. But how can I get a unicode character when the XXXX part is a variable?

For example:

var input = '2122';
console.log('\\u' + input);             // returns a string: "\u2122"
console.log(new String('\\u' + input)); // returns a string: "\u2122"

The only way I can think of to make it work, is to use eval; yet I hope there’s a better solution:

var input = '2122';
var char = '\\u' + input;
console.log(eval("'" + char + "'"));    // returns a character: "™"

Answer 1

Use String.fromCharCode() like this: String.fromCharCode(parseInt(input,16)). When you put a Unicode value in a string using \u, it is interpreted as a hexdecimal value, so you need to specify the base (16) when using parseInt.