很容易检测控制键事件
document.addEventListener('keyup', handler, false);
...
function handler(e) {
var key = e.which || e.keyCode;
if (key == 17) { // Control key
...
}
}
问题是任何组合键如control-c和control-v也会触发事件,似乎事件处理程序无法区分单个 control 和 control-c中的 control kbd>.
我想要的是只允许按下并释放单个键,而不是组合键来触发事件。
最佳答案
这个怎么样:
var controlConsidered = false;
function ctrlPressed() {
console.log("Control was pressed.");
}
function keydownhandler(e) {
var key = e.which || e.keyCode;
controlConsidered = (key == 17);
}
function keyuphandler(e) {
var key = e.which || e.keyCode;
if (key == 17 && controlConsidered) {
ctrlPressed();
}
}
document.addEventListener('keydown', keydownhandler, false);
document.addEventListener('keyup', keyuphandler, false);
关于javascript - 如何检测单个控件的按键事件而不是组合键?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/33060901/