key event properties
Bottom of this article contains more examples.
Definitions and use
key event returns the key identifier when the key is pressed.
The key identifier is a string representation of a keyboard button, the return value of this property can be:
- Single letter (e.g. "a", "W", "4", "+" or "$")
- More letters (such as "F1", "Enter", "HOME" or "CAPS LOCK")
Tip: If you want to see if the press "ALT", "CTRL", "META" or "SHIFT" key, you can use altKey , ctrlKey , metakey or shiftKey property.
Browser Support
Figures in the table represent the first browser to support the property version number.
| Attributes | |||||
|---|---|---|---|---|---|
| key | not support | 9.0 | 23.0 | not support | not support |
grammar
event .key
technical details
| return value: | String that represents the key button. Possible values:
|
|---|---|
| DOM version: | DOM Level 3 Events |
More examples
Examples
When the user presses the "A" key to pop up a message:
var x = event.key;
// Press "a" or "A" key (use caps lock or shift), the pop-up message
if (x == "a" || x == "A") {
alert ( "You pressed the 'A' key!");
}
// Press "a" or "A" key (use caps lock or shift), the pop-up message
if (x == "a" || x == "A") {
alert ( "You pressed the 'A' key!");
}
try it"
Related Pages
HTML DOM Reference Manual: Key Event Properties
HTML DOM Reference: charCode Event Properties
HTML DOM Reference Manual: Which Event Properties