Detecting individual Unicode character support with JavaScript

Question

Is it possible to detect if the client supports a particular Unicode character or if it will be rendered as a missing glyph box?

Important: Support in as many browser

Answer 1

You can always evaluate each character using the charCodeAt() method. This will return the unicode character value. Depending on what you are doing, you can restrict the range of which you want to accept as "Valid" characters... If you copy the character that's in the "box", you can use a character translator on the web to see what the corresponding unicode value is.

Here's one that I googled and found: enter link description here