javascript - How to convert a char to its keycode?

Question

How can I convert a character to its respective keycode?

For example:

• a to 65
• b to 66
• c to 67
• d to 68

Answer 1

You can use the charCodeAt function to achieve this.

Working example:

function showKeyCode () {
    var character = document.getElementById("character").value.substring(0, 1);
    var code = document.getElementById("character").value.charCodeAt(0);
    var msg = "The Key Code for the "" + character + "" character is " + code + ".";
    alert(msg);
}

<input type="text" id="character" size="15">
<input type="button" value="Show Key Code" onclick="showKeyCode();">