当一个按键被释放时，keyup事件被触发。
常规信息
- 规范
- DOM L3
- 接口
- KeyboardEvent
- 是否冒泡
- Yes
- 能否取消默认行为
- Yes
- 目标
- Document, Element
- 默认行为
- None
属性
| Property | Type | Description |
|---|---|---|
target 只读 |
EventTarget |
The event target (the topmost target in the DOM tree). |
type 只读 |
DOMString |
The type of event. |
bubbles 只读 |
Boolean |
Whether the event normally bubbles or not |
cancelable 只读 |
Boolean |
Whether the event is cancellable or not? |
view 只读 |
WindowProxy |
document.defaultView (window of the document) |
detail 只读 |
long (float) |
0. |
target |
EventTarget (DOM element) | Focused element processing the key event, root element if no suitable input element focused. |
char 只读 未实现 (查看 bug 680830) |
DOMString (string) |
The character value of the key.
If the key corresponds to a printable character, this value is a non-empty Unicode string containing that character.
If the key doesn't have a printable representation, this is an empty string.
See key names and char values for the detail.
Note: If the key is used as a macro that inserts multiple characters, this attribute's value is the entire string, not just the first character.
|
key 未实现 (查看 bug 680830) |
DOMString (string) |
The key value of the key represented by the event.
If the value has a printed representation, this attribute's value is the same as the char attribute.
Otherwise, it's one of the key value strings specified in {{ anch("Key values") }}.
If the key can't be identified, this is the string "Unidentified".
See key names and char values for the detail.
Read Only.
|
charCode 只读 |
Unsigned long (int) |
The Unicode reference number of the key; this attribute is used only by the keypress event.
For keys whose char attribute contains multiple characters, this is the Unicode value of the first character in that attribute.
Warning: This attribute is deprecated; you should use
char instead, if available.
|
keyCode 只读 |
Unsigned long (int) |
A system and implementation dependent numerical code identifying the unmodified value of the pressed key.
This is usually the decimal ASCII ({{ RFC(20) }}) or Windows 1252 code corresponding to the key; see {{ anch("Virtual key codes") }} for a list of common values.
If the key can't be identified, this value is 0.
Warning: This attribute is deprecated; you should use
key instead, if available.
|
which 只读 |
Unsigned long (int) |
A system and implementation dependent numeric code identifying the unmodified value of the pressed key; this is usually the same as keyCode.
Warning: This attribute is deprecated; you should use
key instead, if available.
|
location 只读 |
long (float) | The location of the key on the device. |
repeat 只读 未实现 |
boolean |
true if a key has been depressed long enough to trigger key repetition, otherwise false.
|
locale 只读 未实现 |
string | The language code for the key event, if available; otherwise, the empty string. |
ctrlKey 只读 |
boolean | true if the control key was down when the event was fired. false otherwise. |
shiftKey 只读 |
boolean | true if the shift key was down when the event was fired. false otherwise. |
altKey 只读 |
boolean | true if the alt key was down when the event was fired. false otherwise. |
metaKey 只读 |
boolean | true if the meta key was down when the event was fired. false otherwise. |