Is there an alternative to deprecated e.which in JavaScript?

题意："在 JavaScript 中，有没有可以替代已弃用的 `e.which` 的方法？"

问题背景：

Im new to JavaScript event handling, I would like to trigger an event upon mousemove and left-click on a div element. My current implementation is to check that e.which == 1 when I trigger the mousemove event function. However, I have read that the e.which property is now deprecated (UIEvent: which property - Web APIs | MDN). My code:

"我是 JavaScript 事件处理的新手，我想在鼠标移动和左键点击一个 div 元素时触发一个事件。当前的实现是通过在触发 `mousemove` 事件时检查 `e.which == 1`。然而，我读到 `e.which` 属性已经被弃用（UIEvent: which property - Web APIs | MDN）。我的代码如下："

div.addEventListener("mousemove", myEventFunction)

function myEventFunction(e){
    if (e.which == 1){
       //do something
    }

}

Is there any alternative to perform this operation?

"是否有替代方法来执行此操作？"

问题解决：

You can use event.button if it is gonna be a mouse event.

“如果是鼠标事件，你可以使用 `event.button`。”

The MouseEvent.button read-only property indicates which button was pressed on the mouse to trigger the event.

function myEventFunction(e) {
    e = e || window.event;
    if ("buttons" in e) {
        return button;
    }
    var button = e.which || e.button;
    return button;
}

The above function returns the button value.

“上述函数返回的是 `button` 值。”