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  2. Web API
  3. Element
  4. Element: show event

弃用
This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the 兼容性表格 at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

show event is fired when a contextmenu event was fired on/bubbled to an element that has a contextmenu 属性 .

冒泡 No
可取消 No
接口 事件
事件处理程序特性 onshow

范例 

<div contextmenu="test"></div>
<menu type="context" id="test">
  <menuitem label="alert" onclick="alert('the alert label has been clicked')" />
</menu>
<script>
  document.getElementById("test").addEventListener("show", function(e){
    alert("the context menu will be displayed");
  }, false);
</script>

规范

规范 状态
HTML5
The definition of 'show event' in that specification. 		推荐

浏览器兼容性

更新 GitHub 上的兼容性数据
桌面 移动
Chrome Edge Firefox Internet Explorer Opera Safari Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
show event 弃用 Chrome 不支持 No Edge 不支持 No Firefox Yes IE ? Opera ? Safari ? WebView Android 不支持 No Chrome Android 不支持 No Firefox Android Yes Opera Android ? Safari iOS ? Samsung Internet Android 不支持 No

图例

完整支持

不支持

不支持

兼容性未知 ?

兼容性未知

弃用。不要用于新网站。

弃用。不要用于新网站。

另请参阅

元数据

  • 最后修改：
  1. 元素
  2. 特性
    1. accessKey
    2. 属性
    3. childElementCount
    4. children
    5. classList
    6. className
    7. clientHeight
    8. clientLeft
    9. clientTop
    10. clientWidth
    11. currentStyle
    12. firstElementChild
    13. id
    14. innerHTML
    15. lastElementChild
    16. localName
    17. 名称
    18. namespaceURI
    19. nextElementSibling
    20. onfullscreenchange
    21. onfullscreenerror
    22. openOrClosedShadowRoot
    23. outerHTML
    24. part
    25. prefix
    26. previousElementSibling
    27. runtimeStyle
    28. scrollHeight
    29. scrollLeft
    30. scrollLeftMax
    31. scrollTop
    32. scrollTopMax
    33. scrollWidth
    34. shadowRoot
    35. slot
    36. tabStop
    37. tagName
  3. 方法
    1. after()
    2. animate()
    3. append()
    4. attachShadow()
    5. before()
    6. closest()
    7. computedStyleMap()
    8. createShadowRoot()
    9. getAnimations()
    10. getAttribute()
    11. getAttributeNames()
    12. getAttributeNode()
    13. getAttributeNodeNS()
    14. getAttributeNS()
    15. getBoundingClientRect()
    16. getClientRects()
    17. getElementsByClassName()
    18. getElementsByTagName()
    19. getElementsByTagNameNS()
    20. hasAttribute()
    21. hasAttributeNS()
    22. hasAttributes()
    23. hasPointerCapture()
    24. insertAdjacentElement()
    25. insertAdjacentHTML()
    26. insertAdjacentText()
    27. matches()
    28. msZoomTo()
    29. prepend()
    30. querySelector()
    31. querySelector()
    32. querySelectorAll()
    33. querySelectorAll()
    34. releasePointerCapture()
    35. remove()
    36. removeAttribute()
    37. removeAttributeNode()
    38. removeAttributeNS()
    39. replaceChildren()
    40. replaceWith()
    41. requestFullscreen()
    42. requestPointerLock()
    43. scroll()
    44. scrollBy()
    45. scrollIntoView()
    46. scrollIntoViewIfNeeded()
    47. scrollTo()
    48. setAttribute()
    49. setAttributeNode()
    50. setAttributeNodeNS()
    51. setAttributeNS()
    52. setCapture()
    53. setPointerCapture()
    54. toggleAttribute()
  4. 事件
    1. afterscriptexecute
    2. auxclick
    3. blur
    4. click
    5. compositionend
    6. compositionstart
    7. compositionupdate
    8. contextmenu
    9. copy
    10. cut
    11. dblclick
    12. DOMActivate
    13. DOMMouseScroll
    14. error
    15. focus
    16. focusin
    17. focusout
    18. fullscreenchange
    19. fullscreenerror
    20. gesturechange
    21. gestureend
    22. gesturestart
    23. keydown
    24. keypress
    25. keyup
    26. mousedown
    27. mouseenter
    28. mouseleave
    29. mousemove
    30. mouseout
    31. mouseover
    32. mouseup
    33. mousewheel
    34. MozMousePixelScroll
    35. msContentZoom
    36. MSGestureChange
    37. MSGestureEnd
    38. MSGestureHold
    39. MSGestureStart
    40. MSGestureTap
    41. MSInertiaStart
    42. MSManipulationStateChanged
    43. overflow
    44. paste
    45. scroll
    46. select
    47. show
    48. touchcancel
    49. touchend
    50. touchmove
    51. touchstart
    52. underflow
    53. webkitmouseforcechanged
    54. webkitmouseforcedown
    55. webkitmouseforceup
    56. webkitmouseforcewillbegin
    57. wheel
  5. 继承：
    1. 节点
    2. EventTarget