防止在离开拖动时单击以在 js 中滚动
我有一个也可拖动的水平滚动 div。这个 div 里面的元素是链接。每次我离开拖动它都会触发点击并将我发送到链接。有没有办法可以在离开拖动后阻止点击，但在不拖动时保持可用？
这是一个片段：
const slider = document.querySelector('.wrapper');
let isDown = false;
let startX;
let scrollLeft;
slider.addEventListener('mousedown', (e) => {
isDown = true;
slider.classList.add('active');
startX = e.pageX - slider.offsetLeft;
scrollLeft = slider.scrollLeft;
});
slider.addEventListener('mouseleave', () => {
isDown = false;
slider.classList.remove('active');
});
slider.addEventListener('mouseup', () => {
isDown = false;
slider.classList.remove('active');
});
slider.addEventListener('mousemove', (e) => {
if(!isDown) return;
e.preventDefault();
const x = e.pageX - slider.offsetLeft;
const walk = (x - startX)*2;
slider.scrollLeft = scrollLeft - walk;
});
document.getElementsByClassName('.book').ondragstart = function() { return false; };
.wrapper {
position: relative;
display: -webkit-box;
display: -webkit-flex;
display: -ms-flexbox;
display: flex;
overflow: auto;
min-width: 100%;
}
.book {
width: auto;
height: 100vh;
min-width: 50vw;
}
.one {
background-color: #d07fe0;
}
.two {
background-color: #808888;
}
.three {
background-color: #83e7dc;
}
.four {
background-color: #edf7a8;
}
.five {
background-color: #e9d98f;
}
.six {
background-color: #fdd;
}
<body>
<div class="wrapper">
<a href="https://stackoverflow.com/" class="book one"></a>
<a href="https://stackoverflow.com/" class="book two"></a>
<a href="https://stackoverflow.com/" class="book three"></a>
<a href="https://stackoverflow.com/" class="book four"></a>
<a href="https://stackoverflow.com/" class="book five"></a>
<a href="https://stackoverflow.com/" class="book six"></a>
</div>
</body>
慕运维80795931回答
-
吃鸡游戏
我可以建议的一种方法。定义一个函数 preventClickconst preventClick = (e) => { e.preventDefault(); e.stopImmediatePropagation(); }定义一个变量isDragged以有条件地添加和删除事件侦听器。let isDragged = false;在mouseup事件中，您输入 2 种情况，isDragged = false（单击时）或isDragged = true（拖动时）第一种情况： 移除阻止点击传播的事件监听器第二种情况： 添加防止点击传播的事件监听器。试试下面的代码，让我知道这是否有帮助。请注意，这不是优化代码。我正在为所有锚标记添加和删除事件处理程序，只是为了演示您可以遵循的方法。const slider = document.querySelector(".wrapper"); const preventClick = (e) => { e.preventDefault(); e.stopImmediatePropagation(); } let isDown = false; var isDragged = false; let startX; let scrollLeft; slider.addEventListener("mousedown", e => { isDown = true; slider.classList.add("active"); startX = e.pageX - slider.offsetLeft; scrollLeft = slider.scrollLeft; }); slider.addEventListener("mouseleave", () => { isDown = false; slider.classList.remove("active"); }); slider.addEventListener("mouseup", e => { isDown = false; const elements = document.getElementsByClassName("book"); if(isDragged){ for(let i = 0; i<elements.length; i++){ elements[i].addEventListener("click", preventClick); } }else{ for(let i = 0; i<elements.length; i++){ elements[i].removeEventListener("click", preventClick); } } slider.classList.remove("active"); isDragged = false; }); slider.addEventListener("mousemove", e => { if (!isDown) return; isDragged = true; e.preventDefault(); const x = e.pageX - slider.offsetLeft; const walk = (x - startX) * 2; slider.scrollLeft = scrollLeft - walk; }); document.getElementsByClassName("book").ondragstart = function() { console.log("Drag start"); }; .wrapper { position: relative; display: -webkit-box; display: -webkit-flex; display: -ms-flexbox; display: flex; overflow: auto; min-width: 100%; } .book { width: auto; height: 100vh; min-width: 50vw; } .one { background-color: #d07fe0; } .two { background-color: #808888; } .three { background-color: #83e7dc; } .four { background-color: #edf7a8; } .five { background-color: #e9d98f; } .six { background-color: #fdd; }<body> <div class="wrapper"> <a href="https://stackoverflow.com/" class="book one"></a> <a href="https://stackoverflow.com/" class="book two"></a> <a href="https://stackoverflow.com/" class="book three"></a> <a href="https://stackoverflow.com/" class="book four"></a> <a href="https://stackoverflow.com/" class="book five"></a> <a href="https://stackoverflow.com/" class="book six"></a> </div> </body>
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相关分类
JavaScript