jQuery 如何检测是否按下了 Ctrl+R？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/2767126/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How to detect that Ctrl+R was pressed?
提问by sadmicrowave
I'm coding a function in jquery that executes if Ctrl+Ris pressed but I can't seem to find out what the left and right ctrl keycodes are... Can someone please help?
我正在 jquery 中编写一个函数，如果按下Ctrl+R则执行该函数，但我似乎无法找出左右 ctrl 键码是什么......有人可以帮忙吗？
UPDATE
更新
///this works
$(document).keydown(function(e){
if(e.keyCode==17){alert("control was pressed")};
});
Next Question-- How do I link control key press and another key press to execute a function?
下一个问题 - 如何链接控制按键和另一个按键以执行功能？
if(e.keyCode==17){llCtrlPress=1};
if(e.keyCode==97 && llCtrlPress=1){DO SOMETHING}
????????????
That seems like it would work fine but then how do I set llCtrlpress back to '0' on keyup?
这似乎可以正常工作，但是如何在键盘上将 llCtrlpress 设置回“0”？
回答by Alan Hymanson
You have to use the keydownfunction to trap Ctrlcharacters. Here is my implementation of Ctrl+A:
您必须使用keydown函数来捕获Ctrl字符。这是我对Ctrl+ 的实现A：
$(document).keydown(function(e) {
if (e.keyCode == 65 && e.ctrlKey) {
alert('ctrl A');
}
});
Ctrl-R is tougher because in most browsers, that is Reload Page, which means the javascript doesn't run, the page is refreshed.
Ctrl-R 更难，因为在大多数浏览器中，即Reload Page，这意味着 javascript 不运行，页面被刷新。
Just a note as well, the keyCodevalue are different in the keydown/keyupup functions than in the keypress functions.
还要注意的是，keydown/keyupup 函数中的keyCode值与 keypress 函数中的值不同。
EDIT:Removed ctrl variable, forgot about ctrlKey
编辑：删除了 ctrl 变量，忘记了 ctrlKey
回答by Saurav S.
This is the code I'm using to disable refresh on IE and firefox (This works well for F5, Ctrl+F5and Ctrl+R)
这是我用来在 IE 和 firefox 上禁用刷新的代码（这适用于F5, Ctrl+F5和Ctrl+ R）
<script language="javascript" type="text/javascript">
//this code handles the F5/Ctrl+F5/Ctrl+R
document.onkeydown = checkKeycode
function checkKeycode(e) {
var keycode;
if (window.event)
keycode = window.event.keyCode;
else if (e)
keycode = e.which;
// Mozilla firefox
if ($.browser.mozilla) {
if (keycode == 116 ||(e.ctrlKey && keycode == 82)) {
if (e.preventDefault)
{
e.preventDefault();
e.stopPropagation();
}
}
}
// IE
else if ($.browser.msie) {
if (keycode == 116 || (window.event.ctrlKey && keycode == 82)) {
window.event.returnValue = false;
window.event.keyCode = 0;
window.status = "Refresh is disabled";
}
}
}
</script>
If you don't want to use useragent to detect what type of browser it is ($.browser uses navigator.userAgent to determine the platform), you can use
如果不想使用useragent来检测浏览器是什么类型的（$.browser使用navigator.userAgent来判断平台），可以使用
if('MozBoxSizing' in document.documentElement.style)- returns true for firefox
if('MozBoxSizing' in document.documentElement.style)- 为 Firefox 返回 true
回答by lincolnk
why aren't you using e.ctrlKey?
你为什么不使用e.ctrlKey？
if (e.keyCode == 65 && e.ctrlKey) {
alert('ctrl A');
}
edit: here's an appropriate function to detect your ctrl-r keypress and stop the browser from reloading.
编辑：这是一个适当的功能来检测您的 ctrl-r 按键并阻止浏览器重新加载。
function keydown(e) {
if (e.ctrlKey && e.keyCode == 82) {
// 82 = r
// TODO: your thing.
if (e.preventDefault) {
e.preventDefault();
}
else {
return false;
}
}
}
i'm a jquery newbie, i think you'd do
我是 jquery 新手，我想你会这样做
$(document).keydown(keydown);
right?
对？
回答by Jithu
回答by Gibolt
Use event.keyand modern JS!
使用event.key和现代JS！
$(document).keypress(function(event) {
if (event.key === "r" && event.ctrlKey) {
// Do something
}
});
or without jQuery:
或不使用 jQuery：
document.addEventListener("keypress", function onEvent(event) {
if (event.key === "r" && event.ctrlKey) {
// Do something better
}
});
回答by Josh Stodola
回答by MSM
@HostListener('window:keydown', ['$event'])
keyEvent(event: KeyboardEvent) {
if (event.ctrlKey && event.keyCode == 82)
{
}
}
回答by Aravinthan
We can also use Ascii code for finding the characters as well as the characters
我们还可以使用 Ascii 代码来查找字符以及字符
$('html').keydown(function (e) {
keydownfunc(e);
});
function keydownfunc(e) {
if (e.ctrlKey && (e.key === "r" || e.key === "R")) {
alert("ctrl+R");
}
}
回答by Rahul Kumar
The Key Code for Ctrlkey is 11.
密钥的密钥代码Ctrl是11。
$(document).keypress(function(e) {
alert("Ctrl is pressed: " + e.ctrlKey);
});
