javascript - 当我点击鼠标左键时让这个功能起作用吗？

Question

我正在创建一个扩展，并将使用 tampermonkey 来运行它，我希望当我单击鼠标左键并按住它时它仍然可以运行。

// @run-at       document-end

(function() {
var amount = 6;
var duration = 50; //ms

var overwriting = function(evt) {
    if (evt.keyCode === 0) { // Left mouse click?
        for (var i = 0; i < amount; ++i) {
            setTimeout(function() {
                window.onkeydown({keyCode: 87}); // KEY_W
                window.onkeyup({keyCode: 87});
            }, i * duration);
        }
    }
};

window.addEventListener('keydown', overwriting);
})();

Answer 1

尝试使用“mousedown”代替:

(function() {
var amount = 6;
var duration = 50; //ms

var overwriting = function(evt) {
    for (var i = 0; i < amount; ++i) {
        setTimeout(function() {
            window.onkeydown({keyCode: 87}); // KEY_W
            window.onkeyup({keyCode: 87});
        }, i * duration);
    }
};

window.addEventListener('mousedown', overwriting);
})();