JavaScript：检查是否按下了 CTRL 按钮
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JavaScript: Check if CTRL button was pressed
提问by user324589457
I need to check if the CTRLbutton was pressed while I am clicking on a control on my html page using JavaScript.
CTRL当我使用 JavaScript 单击 html 页面上的控件时，我需要检查按钮是否被按下。
How can I do this?
我怎样才能做到这一点？
回答by Charles Ma
Try looking in the event object.
尝试查看事件对象。
e.g.
例如
document.body.onclick = function (e) {
if (e.ctrlKey) {
alert("ctr key was pressed during the click");
}
}<p>Click me, and sometimes hold CTRL down!</p>回答by Arun Prasad E S
I use this and works fine
我使用这个并且工作正常
<a href="" onclick="return Details(event)" ></a>
function Details(event) {
if (event.ctrlKey) {
alert('Ctrl down');
}
}
回答by Sacky San
I did it using cntrlIsPressed global flag; also takes care of select all option using Control + A
我使用 cntrlIsPressed 全局标志做到了；还使用 Control + A 处理全选选项
// Check whether control button is pressed
$(document).keydown(function(event) {
if (event.which == "17")
cntrlIsPressed = true;
else if (event.which == 65 && cntrlIsPressed) {
// Cntrl+ A
selectAllRows();
}
});
$(document).keyup(function() {
cntrlIsPressed = false;
});
var cntrlIsPressed = false;
