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社区首页 >问答首页 >如何将悬停转换为JavaScript中的单击？

问如何将悬停转换为JavaScript中的单击？
EN

Stack Overflow用户
提问于 2022-03-16 13:17:24
回答 2查看 69关注 0票数 0

我必须在我设计的网站上创建这样一个滑块。给定JavaScript代码，我如何以可点击的方式设计它？我想做像拖放一样的东西，可以在所有的网站上使用，特别是移动和平板电脑这样的小尺寸。此JavaScript代码仅组织浮点模式，如果单击除小大小外，则无效。我们怎么能这么做？

预先感谢您的合作。

​

代码语言：javascript
复制
class BeforeAfter {
    constructor(enteryObject) {

        const beforeAfterContainer = document.querySelector(enteryObject.id);
        const before = beforeAfterContainer.querySelector('.bal-before');
        const beforeText = beforeAfterContainer.querySelector('.bal-beforePosition');
        const afterText = beforeAfterContainer.querySelector('.bal-afterPosition');
        const handle = beforeAfterContainer.querySelector('.bal-handle');
        var widthChange = 0;

        beforeAfterContainer.querySelector('.bal-before-inset').setAttribute("style", "width: " + beforeAfterContainer.offsetWidth + "px;")
        window.onresize = function () {
            beforeAfterContainer.querySelector('.bal-before-inset').setAttribute("style", "width: " + beforeAfterContainer.offsetWidth + "px;")
        }
        before.setAttribute('style', "width: 50%;");
        handle.setAttribute('style', "left: 50%;");

        //touch screen event listener
        beforeAfterContainer.addEventListener("touchstart", (e) => {

            beforeAfterContainer.addEventListener("touchmove", (e2) => {
                let containerWidth = beforeAfterContainer.offsetWidth;
                let currentPoint = e2.changedTouches[0].clientX;

                let startOfDiv = beforeAfterContainer.offsetLeft;

                let modifiedCurrentPoint = currentPoint - startOfDiv;

                if (modifiedCurrentPoint > 10 && modifiedCurrentPoint < beforeAfterContainer.offsetWidth - 10) {
                    let newWidth = modifiedCurrentPoint * 100 / containerWidth;

                    before.setAttribute('style', "width:" + newWidth + "%;");
                    afterText.setAttribute('style', "z-index: 1;");
                    handle.setAttribute('style', "left:" + newWidth + "%;");
                }
            });
        });

        //mouse move event listener
        beforeAfterContainer.addEventListener('mousemove', (e) => {
            let containerWidth = beforeAfterContainer.offsetWidth;
            widthChange = e.offsetX;
            let newWidth = widthChange * 100 / containerWidth;

            if (e.offsetX > 10 && e.offsetX < beforeAfterContainer.offsetWidth - 10) {
                before.setAttribute('style', "width:" + newWidth + "%;");
                afterText.setAttribute('style', "z-index:" + "1;");
                handle.setAttribute('style', "left:" + newWidth + "%;");
            }
        })

    }
}
new BeforeAfter({
    id: '#one'
});
代码语言：javascript
复制
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.top-title {
    text-align: center;
    font-family: Arial, Helvetica, sans-serif;
    margin: 1rem 0.5rem;
}

.top-title span {
    font-style: italic;
    font-size: 1.5rem;
}

@media all and (max-width: 479px) {
    .mainSection {
        display: flex;
        flex-direction: column;
        flex-wrap: nowrap;
        justify-content: space-around;
        align-items: stretch;
        align-content: stretch;
        width: 100%;
        height: 700px;
        padding: 10px;
    }
    .bal-container {
        margin: 10px 0;
    }
}

@media all and (max-width: 599px) {
    .mainSection {
        display: flex;
        flex-direction: column;
        flex-wrap: nowrap;
        justify-content: space-around;
        align-items: stretch;
        align-content: stretch;
        width: 100%;
        height: 800px;
        padding: 10px;
    }
    .bal-container {
        margin: 10px 0;
    }
}

@media all and (min-width: 480px) and (max-width: 768px) {
    .mainSection {
        display: flex;
        flex-direction: column;
        flex-wrap: nowrap;
        justify-content: space-around;
        align-items: stretch;
        align-content: stretch;
        width: 100%;
        height: 1000px;
        padding: 10px;
    }
    .bal-container {
        margin: 10px 0;
    }
}

@media all and (min-width: 768px) and (max-width: 959px) {
    .mainSection {
        display: flex;
        flex-direction: column;
        flex-wrap: nowrap;
        justify-content: space-around;
        align-items: stretch;
        align-content: stretch;
        width: 100%;
        height: 1100px;
        padding: 10px;
    }
    .bal-container {
        margin: 10px 0;
    }
}

@media all and (min-width: 960px) and (max-width: 1199px) {
    .mainSection {
        display: flex;
        flex-direction: row;
        flex-wrap: nowrap;
        justify-content: space-around;
        align-items: stretch;
        align-content: stretch;
        width: 100%;
        height: 500px;
        padding: 10px;
    }
    .bal-container {
        margin: 0 10px;
    }
}

@media all and (min-width: 1199px) {
    .mainSection {
        display: flex;
        flex-direction: row;
        flex-wrap: nowrap;
        justify-content: space-around;
        align-items: stretch;
        align-content: stretch;
        width: 100%;
        height: 500px;
        padding: 10px;
    }
    .bal-container {
        margin: 0 10px;
    }
}


/* Before After Container */

.bal-container {
    position: relative;
    width: 100%;
    height: 100%;
    cursor: grab;
    overflow: hidden;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.bal-after {
    display: block;
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.bal-before {
    display: block;
    position: absolute;
    top: 0;
    /* right: 0; */
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 15;
    overflow: hidden;
}

.bal-before-inset {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
}

.bal-after img,
.bal-before img {
    object-fit: cover;
    position: absolute;
    width: 100%;
    height: 100%;
    object-position: 50% 50%;
    top: 0;
    bottom: 0;
    left: 0;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -o-user-select: none;
    user-select: none;
}

.bal-beforePosition {
    background: #121212;
    color: #fff;
    left: 0;
    pointer-events: none;
    border-radius: 0.2rem;
    padding: 2px 10px;
}

.bal-afterPosition {
    background: #121212;
    color: #fff;
    right: 0;
    pointer-events: none;
    border-radius: 0.2rem;
    padding: 2px 10px;
}

.beforeLabel {
    position: absolute;
    bottom: 0;
    margin: 1rem;
    font-size: 1em;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -o-user-select: none;
    user-select: none;
}

.afterLabel {
    position: absolute;
    bottom: 0;
    margin: 1rem;
    font-size: 1em;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -o-user-select: none;
    user-select: none;
}


/* handle and arrow */

.bal-handle {
    height: 41px;
    width: 41px;
    position: absolute;
    left: 50%;
    top: 50%;
    margin-left: -20px;
    margin-top: -21px;
    border: 2px solid #fff;
    border-radius: 1000px;
    z-index: 20;
    pointer-events: none;
    box-shadow: 0 0 10px rgb(12, 12, 12);
}

.handle-left-arrow,
.handle-right-arrow {
    width: 0;
    height: 0;
    border: 6px inset transparent;
    position: absolute;
    top: 50%;
    margin-top: -6px;
}

.handle-left-arrow {
    border-right: 6px solid #fff;
    left: 50%;
    margin-left: -17px;
}

.handle-right-arrow {
    border-left: 6px solid #fff;
    right: 50%;
    margin-right: -17px;
}

.bal-handle::before {
    bottom: 50%;
    margin-bottom: 20px;
    box-shadow: 0 0 10px rgb(12, 12, 12);
}

.bal-handle::after {
    top: 50%;
    margin-top: 20.5px;
    box-shadow: 0 0 5px rgb(12, 12, 12);
}

.bal-handle::before,
.bal-handle::after {
    content: " ";
    display: block;
    width: 2px;
    background: #fff;
    height: 9999px;
    position: absolute;
    left: 50%;
    margin-left: -1.5px;
}
代码语言：javascript
复制
<div class="mainSection">
  <div id="one" class="bal-container">
     <div class="bal-before">
        <div class="bal-before-inset">
           <img src="https://farm2.staticflickr.com/1638/26145024230_06acd55d1b_b.jpg">
           <div class="bal-afterPosition afterLabel">
              before
           </div>
       </div>
     </div>

   <div class="bal-after">
       <img src="https://farm2.staticflickr.com/1663/25814974803_d4c55ff708_b.jpg">
       <div class="bal-afterPosition afterLabel">
          After
       </div>
   </div>
                                            
   <div class="bal-handle">
      <span class=" handle-left-arrow"></span>
      <span class="handle-right-arrow"></span>
   </div>     
 </div>
</div>

​

html
css
javascript
EN

回答 2

Stack Overflow用户

发布于 2022-03-16 13:33:37

我向整个元素添加了一个按钮单击操作来打开和关闭拖动。

单击图片以启用滑块。

​

代码语言：javascript
复制
class BeforeAfter {
  constructor(enteryObject) {

    const beforeAfterContainer = document.querySelector(enteryObject.id);
    const before = beforeAfterContainer.querySelector('.bal-before');
    const beforeText = beforeAfterContainer.querySelector('.bal-beforePosition');
    const afterText = beforeAfterContainer.querySelector('.bal-afterPosition');
    const handle = beforeAfterContainer.querySelector('.bal-handle');
    var widthChange = 0;

    beforeAfterContainer.querySelector('.bal-before-inset').setAttribute("style", "width: " + beforeAfterContainer.offsetWidth + "px;")
    window.onresize = function() {
      beforeAfterContainer.querySelector('.bal-before-inset').setAttribute("style", "width: " + beforeAfterContainer.offsetWidth + "px;")
    }
    before.setAttribute('style', "width: 50%;");
    handle.setAttribute('style', "left: 50%;");

    //touch screen event listener
    beforeAfterContainer.addEventListener("touchstart", (e) => {

      beforeAfterContainer.addEventListener("touchmove", (e2) => {
        let containerWidth = beforeAfterContainer.offsetWidth;
        let currentPoint = e2.changedTouches[0].clientX;

        let startOfDiv = beforeAfterContainer.offsetLeft;

        let modifiedCurrentPoint = currentPoint - startOfDiv;

        if (modifiedCurrentPoint > 10 && modifiedCurrentPoint < beforeAfterContainer.offsetWidth - 10) {
          let newWidth = modifiedCurrentPoint * 100 / containerWidth;

          before.setAttribute('style', "width:" + newWidth + "%;");
          afterText.setAttribute('style', "z-index: 1;");
          handle.setAttribute('style', "left:" + newWidth + "%;");
        }
      });
    });

    //toggle active state
    beforeAfterContainer.addEventListener('click', (e) => {
      beforeAfterContainer.classList.toggle("active");
    });

    //mouse move event listener
    beforeAfterContainer.addEventListener('mousemove', (e) => {
      if (beforeAfterContainer.classList.contains("active")) {
        let containerWidth = beforeAfterContainer.offsetWidth;
        widthChange = e.offsetX;
        let newWidth = widthChange * 100 / containerWidth;

        if (e.offsetX > 10 && e.offsetX < beforeAfterContainer.offsetWidth - 10) {
          before.setAttribute('style', "width:" + newWidth + "%;");
          afterText.setAttribute('style', "z-index:" + "1;");
          handle.setAttribute('style', "left:" + newWidth + "%;");
        }
      }
    });

  }
}
new BeforeAfter({
  id: '#one'
});
代码语言：javascript
复制
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.top-title {
  text-align: center;
  font-family: Arial, Helvetica, sans-serif;
  margin: 1rem 0.5rem;
}

.top-title span {
  font-style: italic;
  font-size: 1.5rem;
}

@media all and (max-width: 479px) {
  .mainSection {
    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    justify-content: space-around;
    align-items: stretch;
    align-content: stretch;
    width: 100%;
    height: 700px;
    padding: 10px;
  }
  .bal-container {
    margin: 10px 0;
  }
}

@media all and (max-width: 599px) {
  .mainSection {
    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    justify-content: space-around;
    align-items: stretch;
    align-content: stretch;
    width: 100%;
    height: 800px;
    padding: 10px;
  }
  .bal-container {
    margin: 10px 0;
  }
}

@media all and (min-width: 480px) and (max-width: 768px) {
  .mainSection {
    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    justify-content: space-around;
    align-items: stretch;
    align-content: stretch;
    width: 100%;
    height: 1000px;
    padding: 10px;
  }
  .bal-container {
    margin: 10px 0;
  }
}

@media all and (min-width: 768px) and (max-width: 959px) {
  .mainSection {
    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    justify-content: space-around;
    align-items: stretch;
    align-content: stretch;
    width: 100%;
    height: 1100px;
    padding: 10px;
  }
  .bal-container {
    margin: 10px 0;
  }
}

@media all and (min-width: 960px) and (max-width: 1199px) {
  .mainSection {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: space-around;
    align-items: stretch;
    align-content: stretch;
    width: 100%;
    height: 500px;
    padding: 10px;
  }
  .bal-container {
    margin: 0 10px;
  }
}

@media all and (min-width: 1199px) {
  .mainSection {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: space-around;
    align-items: stretch;
    align-content: stretch;
    width: 100%;
    height: 500px;
    padding: 10px;
  }
  .bal-container {
    margin: 0 10px;
  }
}


/* Before After Container */

.bal-container {
  position: relative;
  width: 100%;
  height: 100%;
  cursor: grab;
  overflow: hidden;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.bal-after {
  display: block;
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.bal-before {
  display: block;
  position: absolute;
  top: 0;
  /* right: 0; */
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 15;
  overflow: hidden;
}

.bal-before-inset {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
}

.bal-after img,
.bal-before img {
  object-fit: cover;
  position: absolute;
  width: 100%;
  height: 100%;
  object-position: 50% 50%;
  top: 0;
  bottom: 0;
  left: 0;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -o-user-select: none;
  user-select: none;
}

.bal-beforePosition {
  background: #121212;
  color: #fff;
  left: 0;
  pointer-events: none;
  border-radius: 0.2rem;
  padding: 2px 10px;
}

.bal-afterPosition {
  background: #121212;
  color: #fff;
  right: 0;
  pointer-events: none;
  border-radius: 0.2rem;
  padding: 2px 10px;
}

.beforeLabel {
  position: absolute;
  bottom: 0;
  margin: 1rem;
  font-size: 1em;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -o-user-select: none;
  user-select: none;
}

.afterLabel {
  position: absolute;
  bottom: 0;
  margin: 1rem;
  font-size: 1em;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -o-user-select: none;
  user-select: none;
}


/* handle and arrow */

.bal-handle {
  height: 41px;
  width: 41px;
  position: absolute;
  left: 50%;
  top: 50%;
  margin-left: -20px;
  margin-top: -21px;
  border: 2px solid #fff;
  border-radius: 1000px;
  z-index: 20;
  pointer-events: none;
  box-shadow: 0 0 10px rgb(12, 12, 12);
}

.handle-left-arrow,
.handle-right-arrow {
  width: 0;
  height: 0;
  border: 6px inset transparent;
  position: absolute;
  top: 50%;
  margin-top: -6px;
}

.handle-left-arrow {
  border-right: 6px solid #fff;
  left: 50%;
  margin-left: -17px;
}

.handle-right-arrow {
  border-left: 6px solid #fff;
  right: 50%;
  margin-right: -17px;
}

.bal-handle::before {
  bottom: 50%;
  margin-bottom: 20px;
  box-shadow: 0 0 10px rgb(12, 12, 12);
}

.bal-handle::after {
  top: 50%;
  margin-top: 20.5px;
  box-shadow: 0 0 5px rgb(12, 12, 12);
}

.bal-handle::before,
.bal-handle::after {
  content: " ";
  display: block;
  width: 2px;
  background: #fff;
  height: 9999px;
  position: absolute;
  left: 50%;
  margin-left: -1.5px;
}
代码语言：javascript
复制
<div class="mainSection">
  <div id="one" class="bal-container">
    <div class="bal-before">
      <div class="bal-before-inset">
        <img src="https://farm2.staticflickr.com/1638/26145024230_06acd55d1b_b.jpg">
        <div class="bal-afterPosition afterLabel">
          before
        </div>
      </div>
    </div>

    <div class="bal-after">
      <img src="https://farm2.staticflickr.com/1663/25814974803_d4c55ff708_b.jpg">
      <div class="bal-afterPosition afterLabel">
        After
      </div>
    </div>

    <div class="bal-handle">
      <span class=" handle-left-arrow"></span>
      <span class="handle-right-arrow"></span>
    </div>
  </div>
</div>

​

票数 1
EN

Stack Overflow用户

发布于 2022-03-17 15:07:08

此代码通过拖放鼠标向下事件和mouseup事件来工作。

​

代码语言：javascript
复制
window.onload = function(){
    class BeforeAfter {
        constructor(enteryObject) {
      
          const beforeAfterContainer = document.querySelector(enteryObject.id);
          const before = beforeAfterContainer.querySelector('.bal-before');
          const beforeText = beforeAfterContainer.querySelector('.bal-beforePosition');
          const afterText = beforeAfterContainer.querySelector('.bal-afterPosition');
          const handle = beforeAfterContainer.querySelector('.bal-handle');
          var widthChange = 0;
      
          beforeAfterContainer.querySelector('.bal-before-inset').setAttribute("style", "width: " + beforeAfterContainer.offsetWidth + "px;")
          window.onresize = function() {
            beforeAfterContainer.querySelector('.bal-before-inset').setAttribute("style", "width: " + beforeAfterContainer.offsetWidth + "px;")
          }
          before.setAttribute('style', "width: 50%;");
          handle.setAttribute('style', "left: 50%;");
      
//touch screen event listener
beforeAfterContainer.addEventListener("touchstart", (e) => {
  beforeAfterContainer.addEventListener("touchmove", (e2) => {let containerWidth = beforeAfterContainer.offsetWidth;
    let currentPoint = e2.changedTouches[0].clientX;
    let startOfDiv = beforeAfterContainer.offsetLeft;
    let modifiedCurrentPoint = currentPoint - startOfDiv;
    if (modifiedCurrentPoint > 10 && modifiedCurrentPoint < beforeAfterContainer.offsetWidth - 10) {
       let newWidth = modifiedCurrentPoint * 100 / containerWidth;
       before.setAttribute('style', "width:" + newWidth + "%;");
       afterText.setAttribute('style', "z-index: 1;");
       handle.setAttribute('style', "left:" + newWidth + "%;");
              }
            });
          });
      
//toggle active state
beforeAfterContainer.addEventListener('mousedown', (e) => {
  beforeAfterContainer.classList.add("active");
});

//toggle de-active state
beforeAfterContainer.addEventListener('mouseup', (e) => {
 beforeAfterContainer.classList.remove("active");
});

//mouse move event listener
beforeAfterContainer.addEventListener('mousemove', (e) => {
  if (beforeAfterContainer.classList.contains("active")) {
      let containerWidth =beforeAfterContainer.offsetWidth;
      widthChange = e.offsetX;
      let newWidth = widthChange * 100 / containerWidth;
      if (e.offsetX > 10 && e.offsetX < beforeAfterContainer.offsetWidth - 10) {
        before.setAttribute('style', "width:" + newWidth + "%;");
       afterText.setAttribute('style', "z-index:" + "1;");
       handle.setAttribute('style', "left:" + newWidth + "%;");
              }
            }
          });
      
        }
      }
new BeforeAfter({
  id: '#one'
});
}

​

票数 0
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/71497791

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