Question

有没有办法在Javascript中只发送shift键（不与其他键组合）？

我知道我可以使用evt.shiftKey 检测 Shift键，但我如何发送只有换班钥匙？

我试过了：

$.event.trigger({type:'keypress', which : character.charCodeAt(16) });

我的console.log给了我：Uncaught ReferenceError: character is not defined

Answer 1

使用KeyboardEvent作为构造函数，您可以在 vanilla JavaScript 中执行以下操作

var e = new KeyboardEvent('keypress', {shiftKey: true});
node.dispatchEvent(e);

其中node是目标元素

更完整

function press_shift(target, /*optional*/ bubbles, /*optional*/ events) {
    var o = {shiftKey: true};
    if (bubbles) o.bubbles = true;
    if (!events && events !== 0) events = -1;
    if ((events & 1) === 1) target.dispatchEvent(new KeyboardEvent('keydown', o));
    if ((events & 2) === 2) target.dispatchEvent(new KeyboardEvent('keypress', o));
    if ((events & 4) === 4) target.dispatchEvent(new KeyboardEvent('keyup', o));
}
press_shift.keydown = 1;
press_shift.keypress = 2;
press_shift.keyup = 4;

// and then for example, to just do a keypress which bubbles up the DOM
press_shift(document.body, true, press_shift.keypress);

Answer 2

您可以使用“keydown”事件。它会给你你想要的结果。

document.addEventListener('keydown', function(evt){
   console.log(evt);
});

如何在Javascript中发送[only] shift键？

2 个答案: