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jquery动画效果实例_动画js

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jquery动画效果实例_动画js文章目录JS动画实现概述平滑动画无缝连续滚动特效轮播图轮播图淡入淡出效果JS动画实现概述在CSS3中可以通过transition过渡属性可以实现动画JS可以利用CSS3中的transition属性实现元素动画平滑动画利用CSStransition属性实现平滑动画效果<button>开始动画</button><divid=”box”></div><script>varbtn=document.queryS

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文章目录

JS动画实现

概述

  • 在CSS3中可以通过transition过渡属性可以实现动画
  • JS可以利用CSS3中的transition属性实现元素动画

匀速动画

JS封装匀速动画

在这里插入图片描述

<button id="btn">开始动画</button>
<div id="box"></div>

var btn = document.querySelector("#btn");
var box = document.querySelector("#box");

var timer = null;
var left = 0;

function animation(target, distance, time) { 
   
    var each = parseInt(distance / time * 30);
    clearInterval(timer);
    timer = setInterval(function() { 
   
        if (left >= distance) { 
   
            clearInterval(timer);
        } else { 
   
            left += each;
            target.style.left = left + "px";
        }
    }, 30);
};

btn.onclick = function() { 
   
    animation(box, 800, 2000);
};

利用CSS transition属性实现平滑动画效果

在这里插入图片描述

<button>开始动画</button>
<div id="box"></div>

<script> var btn = document.querySelector("button"); var box = document.querySelector("#box"); btn.onclick = function() { 
      box.style.transition = "all 2s linear 0s"; box.style.left = "800px"; }; </script>

缓速动画

var btn = document.querySelector("#btn");
var box = document.querySelector("#box");

var timer = null;
var left = 0;

function animation(target, distance) { 
   
    clearInterval(timer);
    timer = setInterval(function() { 
   
        if (left >= distance) { 
   
            clearInterval(timer);
        } else { 
   
            var step = (distance - left) / 10;
            step = step > 0 ? Math.ceil(step) : Math.floor(step);
            left += step;
            target.style.left = left + "px";
        }
    }, 30);
};

btn.onclick = function() { 
   
    animation(box, 800);
};

无缝连续滚动特效

在这里插入图片描述

<div id="banner" class="banner">
    <ul id="list">
        <li><img src="images/0.png" alt=""></li>
        <li><img src="images/1.png" alt=""></li>
        <li><img src="images/2.png" alt=""></li>
        <li><img src="images/3.png" alt=""></li>
        <li><img src="images/4.png" alt=""></li>
        <li><img src="images/5.png" alt=""></li>
    </ul>
</div>

* { 
   
    margin: 0;
    padding: 0;
}

.banner { 
   
    width: 1000px;
    height: 130px;
    border: 1px solid red;
    margin: 50px auto;
    overflow: hidden;
}

.banner ul { 
   
    list-style: none;
    width: 5000px;
    position: relative;
}

.banner ul li { 
   
    float: left;
    margin-right: 10px;
}

var banner = document.querySelector("#banner");
var list = document.querySelector("#list");

list.innerHTML += list.innerHTML;

var left = 0;
var timer = null;

startMove();

function startMove() { 
   
    clearInterval(timer);
    timer = setInterval(function() { 
   
        left -= 4;
        if (left <= -1260) { 
   
            left = 0;
        }
        list.style.left = left + "px";
    }, 20);
}

function stopMove() { 
   
    clearInterval(timer);
}

banner.onmouseenter = function() { 
   
    stopMove();
};

banner.onmouseleave = function() { 
   
    startMove();
};

轮播图

在这里插入图片描述

<div id="banner" class="banner">
    <ul id="list">
        <li><img src="images/0.png" alt=""></li>
        <li><img src="images/1.png" alt=""></li>
        <li><img src="images/2.png" alt=""></li>
        <li><img src="images/3.png" alt=""></li>
        <li><img src="images/4.png" alt=""></li>
        <li><img src="images/5.png" alt=""></li>
    </ul>
    <a id="leftBtn" class="left-btn" href="javascript:;">&lt;</a>
    <a id="rightBtn" class="right-btn" href="javascript:;">&gt;</a>
</div>

* { 
   
    margin: 0;
    padding: 0;
}

.banner { 
   
    width: 650px;
    height: 360px;
    border: 1px solid red;
    margin: 50px auto;
    overflow: hidden;
    position: relative;
}

.banner ul { 
   
    list-style: none;
    width: 5000px;
    height: 100%;
    position: relative;
    left: 0;
}

.banner ul li { 
   
    float: left;
}

.banner ul li img { 
   
    width: 650px;
    height: 360px;
}

.banner a { 
   
    text-decoration: none;
    color: white;
    text-align: center;
    line-height: 50px;
}

.banner .left-btn { 
   
    position: absolute;
    width: 50px;
    height: 50px;
    left: 20px;
    top: 50%;
    margin-top: -25px;
    background-color: rgba(0, 0, 0, .5);
    border-radius: 50%;
}

.banner .right-btn { 
   
    position: absolute;
    width: 50px;
    height: 50px;
    right: 20px;
    top: 50%;
    margin-top: -25px;
    background-color: rgba(0, 0, 0, .5);
    border-radius: 50%;
}

var banner = document.querySelector("#banner");
var dot = document.querySelector("#banner #dot");
var list = document.querySelector("#list");
var leftBtn = document.querySelector("#leftBtn");
var rightBtn = document.querySelector("#rightBtn");

var firstLi = list.lastElementChild.cloneNode(true);
var lastLi = list.firstElementChild.cloneNode(true);
list.insertBefore(firstLi, list.firstElementChild);
list.appendChild(lastLi);

//总长度
var length = list.childElementCount;

//当前显示第几页
var index = 1;

//节流锁
var lock = false;

function setPage(index) { 
   
    list.style.transition = "left .5s ease 0s";
    list.style.left = -index * 650 + "px";
}

setPage(index);


rightBtn.onclick = function() { 
   
    if (lock) { 
   
        return;
    }
    lock = true;

    index++;

    setPage(index);

    if (index === length - 1) { 
   
        setTimeout(function() { 
   
            index = 1;
            list.style.transition = "none";
            list.style.left = -index * 650 + "px";
        }, 500);
    }

    setTimeout(function() { 
   
        lock = false;
    }, 500);
};

leftBtn.onclick = function() { 
   
    if (lock) { 
   
        return;
    }
    lock = true;

    index--;
    setPage(index);

    if (index === 0) { 
   
        setTimeout(function() { 
   
            index = length - 2;
            list.style.transition = "none";
            list.style.left = -index * 650 + "px";
        }, 500);
    }

    setTimeout(function() { 
   
        lock = false;
    }, 500);
};

轮播图淡入淡出效果

在这里插入图片描述

<div id="banner" class="banner">
    <ul id="list">
        <li><img src="images/0.png" alt=""></li>
        <li><img src="images/1.png" alt=""></li>
        <li><img src="images/2.png" alt=""></li>
        <li><img src="images/3.png" alt=""></li>
        <li><img src="images/4.png" alt=""></li>
        <li><img src="images/5.png" alt=""></li>
    </ul>
    <a id="leftBtn" class="left-btn" href="javascript:;">&lt;</a>
    <a id="rightBtn" class="right-btn" href="javascript:;">&gt;</a>
</div>

* { 
   
    margin: 0;
    padding: 0;
}

.banner { 
   
    width: 650px;
    height: 360px;
    border: 1px solid red;
    margin: 50px auto;
    overflow: hidden;
    position: relative;
}

.banner ul { 
   
    list-style: none;
    width: 5000px;
    height: 100%;
    position: relative;
    left: 0;
}

.banner ul li { 
   
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    transition: opacity 1s ease 0s;
}

.banner ul li:first-child { 
   
    opacity: 1;
}

.banner ul li img { 
   
    width: 650px;
    height: 360px;
}

.banner a { 
   
    text-decoration: none;
    color: white;
    text-align: center;
    line-height: 50px;
}

.banner .left-btn { 
   
    position: absolute;
    width: 50px;
    height: 50px;
    left: 20px;
    top: 50%;
    margin-top: -25px;
    background-color: rgba(0, 0, 0, .5);
    border-radius: 50%;
}

.banner .right-btn { 
   
    position: absolute;
    width: 50px;
    height: 50px;
    right: 20px;
    top: 50%;
    margin-top: -25px;
    background-color: rgba(0, 0, 0, .5);
    border-radius: 50%;
}

var banner = document.querySelector("#banner");
var lis = document.querySelectorAll("#list li");
var leftBtn = document.querySelector("#leftBtn");
var rightBtn = document.querySelector("#rightBtn");

var index = 0;
var length = lis.length;
var lock = false;

rightBtn.onclick = function() { 
   
    if (lock) { 
   
        return;
    }
    lock = true;

    lis[index].style.opacity = 0;
    index++;
    if (index >= length) { 
   
        index = 0;
    }
    lis[index].style.opacity = 1;

    setTimeout(function() { 
   
        lock = false;
    }, 1000);
};
leftBtn.onclick = function() { 
   
    if (lock) { 
   
        return;
    }
    lock = true;

    lis[index].style.opacity = 0;
    index--;
    if (index < 0) { 
   
        index = length - 1;
    }
    lis[index].style.opacity = 1;

    setTimeout(function() { 
   
        lock = false;
    }, 1000);
};
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