Obsolete
This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.
The UIEvent.isChar
read-only property returns a Boolean
indicating whether the event produced a key character or not.
Syntax
var isChar = UIEvent.isChar;
Value
A Boolean which is true
if the event produces a character; otherwise false
. Some keystroke combinations may raise events but not produce any character (example: ctrl-alt-?). When this is the case, isChar
returns false
. It is used when event handlers need to do something like echo the input on the screen.
Example
In this snippet, which is part of an event handler, the event is checked to see if it generates a character; if it does, the value of UIEvent.which
is appended to a string which buffers the typed characters.
if (event.isChar) { characterBuffer += e.which; }
Specification
This property is not part of any specification.
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
isChar | Chrome No support No | Edge No support No | Firefox
No support
? — 55
| IE No support No | Opera No support No | Safari No support No | WebView Android No support No | Chrome Android No support No | Firefox Android
No support
? — 55
| Opera Android No support No | Safari iOS No support No | Samsung Internet Android No support No |
Legend
- No support
- No support
- Non-standard. Expect poor cross-browser support.
- Non-standard. Expect poor cross-browser support.
- Deprecated. Not for use in new websites.
- Deprecated. Not for use in new websites.
- See implementation notes.
- See implementation notes.