如何检测 javascript 中的 shift + key down？
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How can I detect shift + key down in javascript?
提问by Bart
Possible Duplicate:
How to catch enter keypress on textarea but not shift+enter?
How can I detect shift + key down in JavaScript?
如何在 JavaScript 中检测 shift + key down？
采纳答案by Adam Eberlin
var onkeydown = (function (ev) {
var key;
var isShift;
if (window.event) {
key = window.event.keyCode;
isShift = !!window.event.shiftKey; // typecast to boolean
} else {
key = ev.which;
isShift = !!ev.shiftKey;
}
if ( isShift ) {
switch (key) {
case 16: // ignore shift key
break;
default:
alert(key);
// do stuff here?
break;
}
}
});
回答by Niet the Dark Absol
event.shiftKeyis a boolean. trueif the Shift key is being pressed, falseif not. altKeyand ctrlKeywork the same way.
event.shiftKey是一个布尔值。true如果正在按下 Shift 键，false如果没有。altKey并ctrlKey以同样的方式工作。
So basically you just need to detect the keydown as normal with onkeydown, and check those properties as needed.
所以基本上你只需要像往常一样检测 keydown onkeydown，并根据需要检查这些属性。
