空格键触发复选框上的点击事件? [英] Spacebar triggering click event on checkbox?
问题描述
如果您在复选框上有空格键,它会检查框。一切都很好,直到我决定禁用父div上的click事件,我意识到,禁用了复选框上的空格键!
div1.addEventListener(click,function(e){if(e.preventDefault)e.preventDefault(); e.cancelBubble = true; return false;}, true);
< div id =div1> ; < input id =chk1type =checkbox>< / div>
http://jsfiddle.net/0t01252x/1/
我该如何预防这种情况?这对我来说似乎是一个非常奇怪的行为。点击事件是点击事件,而不是键盘事件...
注意:使用chrome和FF测试
编辑:最差:在控制台输出事件给出一个... MouseEvent!
Quirksmode - 点击,mousedown,mouseup,dblclick
当用户点击某个元素时触发click事件,或者通过其他方式激活元素(即键盘) ...click事件是真的是一个误导:它应该被称为激活事件。
要解决这个问题,你可以附加一个点击
和 keyup
事件到复选框。
checkbox.addEventListener(click,handleCheckboxEvent,true);
checkbox.addEventListener(keyup,handleCheckboxEvent,true);
收听两个事件,并始终禁用默认行为。从那里,如果按下键 32
(),您可以确定空格键是否触发了
keyup
如果是这样,手动选中复选框,如果它是不是 >检查,如果 选中,则取消选中。
函数handleCheckboxEvent(e){
e.preventDefault();
if(e.keyCode === 32){//如果空格键触发事件
this.checked =!this.checked;
}
}
更新示例 - 在Chrome / FF / IE的最新版本中进行了测试。
< input id =checkboxtype =checkbox/> ;
If you spacebar on a checkbox, it checks the box. Everything was fine until I decide to disable the click event on the parent div, which I realized, disabled the spacebar on the checkbox as well!
div1.addEventListener("click",function (e) {
if (e.preventDefault) e.preventDefault();
e.cancelBubble = true;
return false;
}, true);
<div id="div1">
<input id="chk1" type="checkbox">
</div>
http://jsfiddle.net/0t01252x/1/
How can I prevent that? It seems like a very odd behaviour to me. Click events are click events, not keyboard events...
Note: tested with chrome and FF
Edit: worst: outputing the event in the console gives a ... MouseEvent!
Quirksmode - click, mousedown, mouseup, dblclick
The click event fires when the user clicks on an element OR activates an element by other means (i.e. the keyboard) ... "click" event is really a misnomer: it should be called the "activate" event.
To work around this, you can attach a click
and keyup
event to the checkbox.
checkbox.addEventListener("click", handleCheckboxEvent, true);
checkbox.addEventListener("keyup", handleCheckboxEvent, true);
Listen to both events, and always disable the default behavior. From there, you can determine if the spacebar fired a keyup
event if the key 32
is pressed (e.keyCode === 32
).
If so, manually check the checkbox if it is not checked, and uncheck it if it is checked.
function handleCheckboxEvent(e) {
e.preventDefault();
if (e.keyCode === 32) { // If spacebar fired the event
this.checked = !this.checked;
}
}
Updated Example - tested in the latest versions of Chrome/FF/IE.
(function () {
var checkbox = document.getElementById('checkbox');
function handleCheckboxEvent(e) {
e.preventDefault();
if (e.keyCode === 32) { // If spacebar fired the event
this.checked = !this.checked;
}
}
checkbox.addEventListener("click", handleCheckboxEvent, true);
checkbox.addEventListener("keyup", handleCheckboxEvent, true);
})();
<input id="checkbox" type="checkbox" />
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