vue状态过度使用侦听器“watch”进行监听，通过侦听器能监听到任何数值property的数值更新。Vue侦听器是提供给开发者可以用来监测某些数据的变化，从而针对这些数据的变化进行某些操作。需要注意侦听器本质上是一个函数，如果要监听哪一个数据的变化，就把那个数据作为函数名。
本教程操作环境：windows7系统、vue3版，DELL G3电脑。
状态过渡
状态就是数据，它包含了数值、颜色值、属性值等等，所以状态过渡指的就是数据本身的过渡动效。
Vue 推荐通过 “数据驱动，响应式更新” 的方式来实现状态过渡。其主要思路就是将一个状态转换为一个响应式变量，然后利用一些动态库去更新这个响应式变量，从而驱动 Vue 的响应式更新，实现过渡的动态效果。
Vue 的过渡系统提供了非常多简单的方法设置进入、离开和列表的动效。那么对于数据元素本身的动效呢，比如：
- 数字和运算
- 颜色的显示
- SVG 节点的位置
- 元素的大小和其他的 property
这些数据要么本身就以数值形式存储，要么可以转换为数值。有了这些数值后，我们就可以结合 Vue 的响应式和组件系统，使用第三方库来实现切换元素的过渡状态。
1.状态动画与侦听器
通过侦听器我们能监听到任何数值 property 的数值更新。
Vue侦听器是提供给开发者可以用来监测某些数据的变化，从而针对这些数据的变化进行某些操作。
但是要注意：侦听器本质上是一个函数，如果要监听哪一个数据的变化，就把那个数据作为函数名
可能听起来很抽象，所以让我们先来看看使用 GreenSock 一个例子：
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/3.2.4/gsap.min.js"></script>
<div id="animated-number-demo">
<input v-model.number="number" type="number" step="20">
<p>{{ animatedNumber }}</p>
</div>
<script>
new Vue({
el: '#animated-number-demo',
data: {
number: 0,
tweenedNumber: 0
},
computed: {
animatedNumber: function() {
return this.tweenedNumber.toFixed(0);
}
},
watch: {
number: function(newValue) {
gsap.to(this.$data, { duration: 0.5, tweenedNumber: newValue });
}
}
})
</script>
当你把数值更新时，就会触发动画。这个是一个不错的演示，但是对于不能直接像数字一样存储的值，比如 CSS 中的 color 的值，通过下面的例子我们来通过 Tween.js 和 Color.js 实现一个例子：
<script src="https://cdn.jsdelivr.net/npm/tween.js@16.3.4"></script>
<script src="https://cdn.jsdelivr.net/npm/color-js@1.0.3"></script>
<div id="example-7">
<input
v-model="colorQuery"
v-on:keyup.enter="updateColor"
placeholder="Enter a color"
>
<button v-on:click="updateColor">Update</button>
<p>Preview:</p>
<span
v-bind:style="{ backgroundColor: tweenedCSSColor }"
class="example-7-color-preview"
></span>
<p>{{ tweenedCSSColor }}</p>
</div>
<script>
var Color = net.brehaut.Color
new Vue({
el: '#example-7',
data: {
colorQuery: '',
color: {
red: 0,
green: 0,
blue: 0,
alpha: 1
},
tweenedColor: {}
},
created: function () {
this.tweenedColor = Object.assign({}, this.color)
},
watch: {
color: function () {
function animate () {
if (TWEEN.update()) {
requestAnimationFrame(animate)
}
}
new TWEEN.Tween(this.tweenedColor)
.to(this.color, 750)
.start()
animate()
}
},
computed: {
tweenedCSSColor: function () {
return new Color({
red: this.tweenedColor.red,
green: this.tweenedColor.green,
blue: this.tweenedColor.blue,
alpha: this.tweenedColor.alpha
}).toCSS()
}
},
methods: {
updateColor: function () {
this.color = new Color(this.colorQuery).toRGB()
this.colorQuery = ''
}
}
})
.example-7-color-preview {
display: inline-block;
width: 50px;
height: 50px;
}
</script>2.动态状态过渡
就像 Vue 的过渡组件一样，数据背后状态过渡会实时更新，这对于原型设计十分有用。当你修改一些变量，即使是一个简单的 SVG 多边形也可实现很多难以想象的效果。
<!DOCTYPE html>
<html>
<head>
<title>Dynamic State Transitions</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/1.18.5/TweenLite.min.js"></script>
<script src="https://unpkg.com/vue"></script>
<style>
svg {
display: block;
}
polygon {
fill: #41b883;
}
circle {
fill: transparent;
stroke: #35495e;
}
input[type="range"] {
display: block;
width: 100%;
margin-bottom: 15px;
}
</style>
</head>
<body>
<div id="app">
<svg width="200" height="200">
<polygon :points="points"></polygon>
<circle cx="100" cy="100" r="90"></circle>
</svg>
<label>Sides: {{ sides }}</label>
<input type="range" min="3" max="500" v-model.number="sides" />
<label>Minimum Radius: {{ minRadius }}%</label>
<input type="range" min="0" max="90" v-model.number="minRadius" />
<label>Update Interval: {{ updateInterval }} milliseconds</label>
<input type="range" min="10" max="2000" v-model.number="updateInterval" />
</div>
<script>
new Vue({
el: "#app",
data: function() {
var defaultSides = 10;
var stats = Array.apply(null, { length: defaultSides }).map(
function() {
return 100;
}
);
return {
stats: stats,
points: generatePoints(stats),
sides: defaultSides,
minRadius: 50,
interval: null,
updateInterval: 500
};
},
watch: {
sides: function(newSides, oldSides) {
var sidesDifference = newSides - oldSides;
if (sidesDifference > 0) {
for (var i = 1; i <= sidesDifference; i++) {
this.stats.push(this.newRandomValue());
}
} else {
var absoluteSidesDifference = Math.abs(sidesDifference);
for (var i = 1; i <= absoluteSidesDifference; i++) {
this.stats.shift();
}
}
},
stats: function(newStats) {
TweenLite.to(this.$data, this.updateInterval / 1000, {
points: generatePoints(newStats)
});
},
updateInterval: function() {
this.resetInterval();
}
},
mounted: function() {
this.resetInterval();
},
methods: {
randomizeStats: function() {
var vm = this;
this.stats = this.stats.map(function() {
return vm.newRandomValue();
});
},
newRandomValue: function() {
return Math.ceil(
this.minRadius + Math.random() * (100 - this.minRadius)
);
},
resetInterval: function() {
var vm = this;
clearInterval(this.interval);
this.randomizeStats();
this.interval = setInterval(function() {
vm.randomizeStats();
}, this.updateInterval);
}
}
});
function valueToPoint(value, index, total) {
var x = 0;
var y = -value * 0.9;
var angle = ((Math.PI * 2) / total) * index;
var cos = Math.cos(angle);
var sin = Math.sin(angle);
var tx = x * cos - y * sin + 100;
var ty = x * sin + y * cos + 100;
return { x: tx, y: ty };
}
function generatePoints(stats) {
var total = stats.length;
return stats
.map(function(stat, index) {
var point = valueToPoint(stat, index, total);
return point.x + "," + point.y;
})
.join(" ");
}
</script>
</body>
</html>3.把过渡放到组件里
管理太多的状态过渡会很快的增加 Vue 实例或者组件的复杂性，幸好很多的动画可以提取到专用的子组件。我们来将之前的示例改写一下：
<script src="https://cdn.jsdelivr.net/npm/tween.js@16.3.4"></script>
<div id="example-8">
<input v-model.number="firstNumber" type="number" step="20"> +
<input v-model.number="secondNumber" type="number" step="20"> =
{{ result }}
<p>
<animated-integer v-bind:value="firstNumber"></animated-integer> +
<animated-integer v-bind:value="secondNumber"></animated-integer> =
<animated-integer v-bind:value="result"></animated-integer>
</p>
</div>
<script>
// 这种复杂的补间动画逻辑可以被复用
// 任何整数都可以执行动画
// 组件化使我们的界面十分清晰
// 可以支持更多更复杂的动态过渡
// 策略。
Vue.component('animated-integer', {
template: '<span>{{ tweeningValue }}</span>',
props: {
value: {
type: Number,
required: true
}
},
data: function () {
return {
tweeningValue: 0
}
},
watch: {
value: function (newValue, oldValue) {
this.tween(oldValue, newValue)
}
},
mounted: function () {
this.tween(0, this.value)
},
methods: {
tween: function (startValue, endValue) {
var vm = this
function animate () {
if (TWEEN.update()) {
requestAnimationFrame(animate)
}
}
new TWEEN.Tween({ tweeningValue: startValue })
.to({ tweeningValue: endValue }, 500)
.onUpdate(function () {
vm.tweeningValue = this.tweeningValue.toFixed(0)
})
.start()
animate()
}
}
})
// 所有的复杂度都已经从 Vue 的主实例中移除！
new Vue({
el: '#example-8',
data: {
firstNumber: 20,
secondNumber: 40
},
computed: {
result: function () {
return this.firstNumber + this.secondNumber
}
}
})
</script>我们能在组件中结合使用这一节讲到各种过渡策略和 Vue 内建的过渡系统。总之，对于完成各种过渡动效几乎没有阻碍。
4.赋予设计生命
只要一个动画，就可以带来生命。不幸的是，当设计师创建图标、logo 和吉祥物的时候，他们交付的通常都是图片或静态的 SVG。所以，虽然 GitHub 的章鱼猫、Twitter 的小鸟以及其它许多 logo 类似于生灵，它们看上去实际上并不是活着的。
Vue 可以帮到你。因为 SVG 的本质是数据，我们只需要这些动物兴奋、思考或警戒的样例。然后 Vue 就可以辅助完成这几种状态之间的过渡动画，来制作你的欢迎页面、加载指示、以及更加带有情感的提示。
Sarah Drasner 展示了下面这个 demo，这个 demo 结合了时间和交互相关的状态改变：
资源：
https://cdnjs.cloudflare.com/ajax/libs/vue/2.1.10/vue.min.js
https://cdnjs.cloudflare.com/ajax/libs/gsap/1.19.1/TweenMax.min.js
HTML代码
<div id="app" @mousemove="coordinates">
<p>Move your mouse or tap</p>
<svg id="walle" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 139.4 129.4">
<defs>
<clipPath id="clip-path" transform="translate(-81.8 -924.4)">
<circle cx="140.5" cy="978.2" r="4.3" fill="none"/>
</clipPath>
<clipPath id="clip-path-2" transform="translate(-81.8 -924.4)">
<path d="M148.5,976.5s1.3,5.2-3.2,6.7l3.4,3.6,9.3-2.1-5-8.3Z" fill="none"/>
</clipPath>
<clipPath id="clip-path-3" transform="translate(-81.8 -924.4)">
<circle cx="155.8" cy="983.6" r="4.3" fill="none"/>
</clipPath>
<clipPath id="clip-path-4" transform="translate(-81.8 -924.4)">
<path d="M130.4,1007.6s1.3-.4,1.9.7a1.5,1.5,0,0,1-.3,1.8c-.2.3-4.5,2.9-4.5,2.9l-20.6,13.7-3.5-6.4Z" fill="none"/>
</clipPath>
<clipPath id="clip-path-5" transform="translate(-81.8 -924.4)">
<path d="M150.6,1000s1.4.3,1.3,1.5a1.5,1.5,0,0,1-1.1,1.5c-.3.2-5.3.5-5.3.5l-24.6,2.3v-7.3Z" fill="none"/>
</clipPath>
</defs>
<g id="Layer_3" data-name="Layer 3">
<ellipse id="shadow" cx="71.5" cy="100.4" rx="26.5" ry="3.6" fill="#394848" opacity="0.35"/>
</g>
<g id="Layer_2" data-name="Layer 2">
<g class="head" v-bind:class="{isFlipped: flip}">
<g id="neck">
<g id="neckb">
<path d="M157.8,995.6a2.6,2.6,0,1,1-4.1-2.2,6.1,6.1,0,0,0-1.7-.3c-1-.2-.9-1.3-.8-1.8a1.6,1.6,0,0,1-.5-1.2,1.7,1.7,0,1,1,3.4,0,1.6,1.6,0,0,1-.5,1.2,5.8,5.8,0,0,0,1.7,1.8A2.6,2.6,0,0,1,157.8,995.6Z" transform="translate(-81.8 -924.4)" fill="#a2b2b3"/>
<circle cx="70.6" cy="65.6" r="0.9" fill="#636767"/>
<circle cx="73.3" cy="71.2" r="1.6" fill="none" stroke="#636767" stroke-miterlimit="10" stroke-width="0.5"/>
</g>
<g id="neckf">
<path id="wire" d="M147.3,989.3s-2-1.9-.7-3.2l3.4-3.7.3.9s-2.6,2.5-3.2,3.3.9,2.5.9,2.5Z" transform="translate(-81.8 -924.4)" fill="#394848"/>
<path fill="#a2b2b3" d="M64.6 67.1L65.3 67.6 69.3 67.5 69.6 67 64.6 67.1z"/>
<path d="M149.8,983.4l.2,2.6-1.9,2.3-1.7.2s-2.5,1.9.3,3.1h4.8s-1.9-2,.5-2.8l-1.5-.2,2.4-2.3L152,983Z" transform="translate(-81.8 -924.4)" fill="#ddeced"/>
<path d="M147,992l4.1-.2,1.1,1.3h2.1a3,3,0,0,0-1.7,2.4h-7.6a2.6,2.6,0,0,1,2.3-2.6Z" transform="translate(-81.8 -924.4)" fill="#ddeced"/>
</g>
</g>
<g id="eyecontain">
<g id="eyes" :style="{ transform:`translate3d(${x}px, ${y}px, 0)`}">
<g id="lefteye">
<path id="lefteyeb2" d="M143.8,972.7l-6.1,1.1a6.2,6.2,0,0,0-4.1,8s2.3,4.4,6.6,3.7l5.4-.6a5.7,5.7,0,0,0,4.4-6l-.6-4.1S148.7,971.8,143.8,972.7Z" transform="translate(-81.8 -924.4)" fill="#a2b2b3"/>
<path id="lefteyeb1" d="M145.1,972.1l-8.1,1s-5.8,1.6-4.1,7.3a4.9,4.9,0,0,0,5.6,3.4l5.4-.6s4.6-.8,4.4-5.4l-.6-4.6S147.9,971.6,145.1,972.1Z" transform="translate(-81.8 -924.4)" fill="#ddeced"/>
<g id="lefteyeball">
<circle cx="58.7" cy="53.8" r="4.3" fill="#0c1112"/>
<g clip-path="url(#clip-path)">
<circle id="ball" cx="59.7" cy="54.8" r="4.3" fill="#394848"/>
</g>
<circle id="glimmer" cx="61.5" cy="51.2" r="1.4" fill="#fff"/>
</g>
</g>
<g id="eyespace">
<g clip-path="url(#clip-path-2)">
<circle cx="66.4" cy="56.1" r="3.6" fill="#f49123"/>
</g>
</g>
<g id="righteye">
<path id="righteyeb2" d="M158.8,978.7l4.1,4.7a6.2,6.2,0,0,1-1.8,8.8s-4.5,2.1-7.4-1.2l-3.9-3.9a5.7,5.7,0,0,1,.2-7.4l3-2.8S155.5,974.9,158.8,978.7Z" transform="translate(-81.8 -924.4)" fill="#a2b2b3"/>
<path id="righteyeb1" d="M156.4,976l5.4,6.1s3.3,5-1.8,8.2a4.9,4.9,0,0,1-6.4-1.2l-3.7-4s-2.9-3.6.3-7l3.5-3.1S154.7,973.8,156.4,976Z" transform="translate(-81.8 -924.4)" fill="#ddeced"/>
<g id="righteyeball">
<circle cx="74" cy="59.2" r="4.3" fill="#0c1112"/>
<g clip-path="url(#clip-path-3)">
<circle id="ball-2" data-name="ball" cx="75" cy="60.2" r="4.3" fill="#394848"/>
</g>
<circle id="glimmer-2" data-name="glimmer" cx="74.7" cy="56.1" r="1.4" fill="#fff"/>
</g>
</g>
</g>
</g>
</g>
<g class="body">
<g id="backwheel">
<path d="M149.9,1007.2l-4.8-.2s-.6-.2-2,1.2l-12.5,12.7s-1.4,2.3.3,3.5a3.9,3.9,0,0,0,3.1.8h7.1Z" transform="translate(-81.8 -924.4)" fill="#394848"/>
<path d="M152.4,1009.2s-2-4.6-6.5-.1l-11,11.2s-3.8,4.1,1.4,4.8h16.2s7.8.2,5.5-7.4Z" transform="translate(-81.8 -924.4)" fill="#636767"/>
<path d="M151.7,1010.8s-1.7-3.8-5.3-.1l-9,9.1s-3.1,3.3,1.2,3.9h13.3s6.4.1,4.6-6Z" transform="translate(-81.8 -924.4)" fill="#0c1112"/>
</g>
<path d="M148.7,1024h3.2a5,5,0,0,0,2.6,1.1h-4.2S148.9,1024.7,148.7,1024Z" transform="translate(-81.8 -924.4)" fill="#0c1112"/>
<g id="rightarm">
<path d="M140.9,999.3l-10.9,6.9a3.2,3.2,0,0,0-.4,4.5c1.9,2.6,5,.1,5,.1l9.2-5.1s3.8-2.3,1.9-5.1A3.8,3.8,0,0,0,140.9,999.3Z" transform="translate(-81.8 -924.4)" fill="#c6690c"/>
<g clip-path="url(#clip-path-4)">
<path id="newrightarm" d="M130.6,1008.4l10.8-6.2a.6.6,0,0,1,.8,0c.3.3.8.5.1,1.1s-10.8,6.5-10.8,6.5-.8.5-1,.4-.6-.9-.6-.9S129.6,1009.1,130.6,1008.4Z" transform="translate(-81.8 -924.4)" fill="#a2b2b3"/>
</g>
<circle cx="48.5" cy="85" r="1.3" fill="#636767"/>
<g id="backhand">
<path d="M131,1011.5c.9.6,1.6-.2,2.4-.4a3.8,3.8,0,0,1,1.5-.3c.1.8-.4,1.4-.5,2.1l-1.4.4c-1.5.7-2.8.7-3.9-.7a.9.9,0,0,0-.5-.7,2,2,0,0,1-.5-1.8c-.1-.7.5-.8.9-1s1.8.7,1.7,1.9A.5.5,0,0,0,131,1011.5Zm-1.1-.9c-.1-.3-.2-.6-.6-.6s-.6.1-.6.5a.7.7,0,0,0,.7.7C129.8,1011.2,129.9,1010.9,130,1010.7Z" transform="translate(-81.8 -924.4)" fill="#636767"/>
<path d="M133.4,1016.1a3.9,3.9,0,0,1-4.3,3.6c-.9-.1-1.3-.9-1.8-1.6a5.5,5.5,0,0,1,.5-1.8c.2-.8.4-.6.8-.1a1.8,1.8,0,0,0,2.4.7Z" transform="translate(-81.8 -924.4)" fill="#424e4f"/>
<path d="M129.1,1012.7c1.1,1.4,2.4,1.4,3.9.7l1.4-.4-.6,2.2-3,1.1a1.3,1.3,0,0,1-1.5-.4C128.2,1014.8,128.2,1014.1,129.1,1012.7Z" transform="translate(-81.8 -924.4)" fill="#424e4f"/>
<path d="M129.1,1012.7c-1,1.4-.9,2.1.1,3.1a1.3,1.3,0,0,0,1.5.4l3-1.1-.3.9-2.4.7a1.8,1.8,0,0,1-2.4-.7c-.3-.5-.6-.7-.8.1a5.5,5.5,0,0,0-.5,1.8l-.5-.5a33.5,33.5,0,0,1,1.7-5.6A.9.9,0,0,1,129.1,1012.7Z" transform="translate(-81.8 -924.4)" fill="#394848"/>
<path d="M128.7,1012a33.5,33.5,0,0,0-1.7,5.6,1.6,1.6,0,0,1-.5-2c.5-1.5.9-3,1.3-4.5v-.2a.6.6,0,0,1,.3-.6A2,2,0,0,0,128.7,1012Z" transform="translate(-81.8 -924.4)" fill="#424e4f"/>
<path d="M130,1010.7c-.1.3-.2.6-.5.6a.7.7,0,0,1-.7-.7c0-.3.3-.5.6-.5S129.9,1010.3,130,1010.7Z" transform="translate(-81.8 -924.4)" fill="#424e4f"/>
</g>
</g>
<g id="front">
<path fill="#f49123" d="M55.1 73.1H76.6V92.91999999999999H55.1z"/>
<path d="M136.3,1014.3h2.8s.9-.1.9,1,.1,1.8.1,1.8a.9.9,0,0,1-.8.8h-2s-1.2-.4-1.2-1.4A4,4,0,0,1,136.3,1014.3Z" transform="translate(-81.8 -924.4)" fill="#ddeced"/>
<rect x="54.8" y="72.9" width="21.2" height="7.67" rx="1" ry="1" fill="#ddeced"/>
<path d="M157.1,997.9h-20c-.3,0-.5-.1-.5-.3s.2-.2.5-.2h20c.3,0,.5.1.5.3S157.4,997.9,157.1,997.9Z" transform="translate(-81.8 -924.4)" fill="#636767" opacity="0.41"/>
<rect x="57.8" y="81.5" width="1.3" height="6.42" rx="0.7" ry="0.7" fill="#f2791e"/>
<rect x="71.5" y="81.4" width="1.3" height="6.42" rx="0.7" ry="0.7" fill="#f2791e"/>
<rect x="64.8" y="81.5" width="1.3" height="6.42" rx="0.7" ry="0.7" fill="#f2791e"/>
<rect x="53.6" y="71.2" width="23" height="1.92" rx="1" ry="1" fill="#ddeced"/>
<path fill="#a2b2b3" d="M59.5 73.1H70.3V79.1H59.5z"/>
<path fill="#bedb45" d="M66.2 74.1H68.4V77.92999999999999H66.2z"/>
<path fill="#636767" d="M61.3 74H64.2V78H61.3z"/>
<circle cx="62.4" cy="75.6" r="0.5" fill="#f76f6f"/>
</g>
<g id="back">
<rect x="74.5" y="71.2" width="13" height="1.75" rx="0.9" ry="0.9" fill="#a2b2b3"/>
<path fill="#f2791e" d="M86.3 80.4L86.3 83.1 81.2 83 76.5 87.3 76.4 80.3 86.3 80.4z"/>
<path fill="#a2b2b3" d="M76.4 72.1H86.30000000000001V80.6H76.4z"/>
<path d="M167.9,997.7h-9.5a.3.3,0,0,1,0-.5h9.5a.3.3,0,0,1,0,.5Z" transform="translate(-81.8 -924.4)" fill="#636767"/>
<rect x="75.9" y="73" width="0.6" height="19.31" rx="0.3" ry="0.3" fill="#636767" opacity="0.34"/>
</g>
<g id="forwardwheel">
<path fill="none" stroke="#0c1112" stroke-linecap="round" stroke-miterlimit="10" stroke-width="0.25" d="M68.1 100.7L90.6 100.7"/>
<path d="M165.8,1007.5H161s-.6-.2-1.9,1.2l-12,12.2s-1.3,2.2.3,3.3a3.8,3.8,0,0,0,3,.8h6.8Z" transform="translate(-81.8 -924.4)" fill="#0c1112" opacity="0.41"/>
<path d="M167.9,1007.2l-4.8-.2s-.6-.2-2,1.2l-12.5,12.7s-1.4,2.3.3,3.5a3.9,3.9,0,0,0,3.1.8h7.1Z" transform="translate(-81.8 -924.4)" fill="#394848"/>
<path d="M170.4,1009.2s-2-4.6-6.5-.1l-11,11.2s-3.8,4.1,1.4,4.8h16.2s7.8.2,5.5-7.4Z" transform="translate(-81.8 -924.4)" fill="#a2b2b3"/>
<path d="M169.7,1010.8s-1.7-3.8-5.3-.1l-9,9.1s-3.1,3.3,1.2,3.9h13.3s6.4.1,4.6-6Z" transform="translate(-81.8 -924.4)" fill="#636767"/>
<path d="M173.6,1017.2l-3-1.7s-11.2.1-6,8.1h5.9Z" transform="translate(-81.8 -924.4)" fill="#394848" opacity="0.78"/>
<path d="M165.1,1010l1.6,4.6s-1.3-.6-1.3,1.2-3.4,3.2-3.4,3.2-1.2-.3-1.4,1.2-2.6,3.4-2.6,3.4H155s-3.5-.1-.4-3h0Z" transform="translate(-81.8 -924.4)" fill="#394848" opacity="0.78"/>
<g id="wheel">
<circle cx="85.4" cy="87.6" r="2.9" fill="#a2b2b3"/>
<circle cx="85.4" cy="87.6" r="2" fill="#ddeced"/>
<ellipse cx="85.1" cy="87.6" rx="1.1" ry="0.8" fill="#394848"/>
<circle cx="85.5" cy="87.6" r="0.8" fill="#a2b2b3"/>
</g>
<g id="wheel-2" data-name="wheel">
<circle cx="81" cy="92.2" r="2.9" fill="#a2b2b3"/>
<circle cx="81" cy="92.2" r="2" fill="#ddeced"/>
<ellipse cx="80.7" cy="92.2" rx="1.1" ry="0.8" fill="#394848"/>
<circle cx="81.1" cy="92.2" r="0.8" fill="#a2b2b3"/>
</g>
<g id="wheel-3" data-name="wheel">
<circle cx="76.7" cy="96.5" r="2.9" fill="#a2b2b3"/>
<circle cx="76.7" cy="96.5" r="2" fill="#ddeced"/>
<ellipse cx="76.4" cy="96.5" rx="1.1" ry="0.8" fill="#394848"/>
<circle cx="76.8" cy="96.5" r="0.8" fill="#a2b2b3"/>
</g>
<g id="wheel-4" data-name="wheel">
<circle cx="88.9" cy="95.2" r="4.1" fill="#a2b2b3"/>
<circle cx="88.9" cy="95.2" r="2.8" fill="#ddeced"/>
<ellipse cx="88.5" cy="95.2" rx="1.6" ry="1.1" fill="#394848"/>
<circle cx="89" cy="95.2" r="1.1" fill="#a2b2b3"/>
</g>
</g>
<g id="leftarm">
<g id="bicep">
<path d="M165.2,998.3H151.2a3.5,3.5,0,0,0-2.7,4.2c.4,2.3,4.4,2.4,4.4,2.4l11.9-.3s4.2.8,3.9-2.8A3.5,3.5,0,0,0,165.2,998.3Z" transform="translate(-81.8 -924.4)" fill="#f2791e"/>
<path d="M154.1,998.4h12.7s2.2.2,2.2,3.1c0,0,.3,2.8-1.8,3s-13.1.3-13.1.3Z" transform="translate(-81.8 -924.4)" fill="#ddeced"/>
<path fill="#636767" d="M72.3 78L75.9 73.8 78.5 73.9 73.5 80.2 72.3 80.2 72.3 78z"/>
<path fill="#636767" d="M76 80.2L81.4 73.9 84 73.9 79 80.1 76 80.2z"/>
<path d="M163.9,1004.5l4.3-5.4a2.6,2.6,0,0,1,.6,1.9l-2.8,3.5Z" transform="translate(-81.8 -924.4)" fill="#636767"/>
</g>
<g clip-path="url(#clip-path-5)">
<path id="newleftarm" d="M150.1,1000.7s-1.8-.3-2,.9,1.8,1,1.8,1l17-.2s1.1-.7.3-1.5S150.1,1000.7,150.1,1000.7Z" transform="translate(-81.8 -924.4)" fill="#a2b2b3"/>
</g>
<g id="hand">
<ellipse cx="66.8" cy="77.3" rx="0.9" ry="0.9" fill="#636767"/>
<path d="M146.1,998.7l4.5,4.9a.8.8,0,0,1-.3,1.1l-3.5,2.1s-.5,0-.4.8,1,1.5.1,2-5.7-2.6-5.7-2.6l-2-4.5a1.7,1.7,0,0,1,1.3-2Z" transform="translate(-81.8 -924.4)" fill="#a2b2b3"/>
<path d="M147.2,1001.1l-4.3,1.1a1.6,1.6,0,0,0-1.1,2.1c.3,1.2,1,3.2,1,3.2" transform="translate(-81.8 -924.4)" fill="none" stroke="#636767" stroke-linecap="round" stroke-miterlimit="10" stroke-width="0.5" opacity="0.46"/>
</g>
</g>
</g>
</g>
</svg>
</div>CSS代码
body {
width: 100vw;
height: 100vh;
overflow: hidden;
font-family: 'Montserrat', sans-serif;
background: #23a9e0;
cursor: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/28963/cockroach%20(2).ico'), default;
-webkit-overflow-scrolling: touch;
}
#app {
-webkit-tap-highlight-color: transparent;
}
svg {
width: 100vw;
height: 100vh;
max-height: 400px;
margin-left: 20vw;
}
p {
font-size: 16px;
color: white;
text-align: center;
}
.isFlipped {
transform: scaleX(-1);
transform-origin: 50% 50%;
}
#leftarm {
transform-origin: 100% 0;
}
@media screen and (max-width: 600px) {
svg {
max-height: 200px !important;
margin-left: 0 !important;
}
}JavaScript代码
new Vue({
el: '#app',
data() {
return {
startX: 0,
x: 0,
y: 0,
flip: false,
audioPlay: false,
startArms: 0
}
},
methods: {
armsTL() {
let tl = new TimelineMax();
tl.add('startarms')
tl.to('#backhand', 2, {
x: -16,
rotation: 150,
transformOrigin: '50% 50%'
}, 'startarms');
tl.to('#rightarm', 2, {
rotation: 30,
transformOrigin: '100% 0'
}, 'startarms');
tl.to('#newrightarm', 2, {
x: -94,
y: -918,
rotation: 10,
transformOrigin: '100% 100%'
}, 'startarms');
tl.to('#hand', 2, {
x: -15,
y: -7,
rotation: 90,
transformOrigin: '50% 50%'
}, 'startarms');
tl.to('#leftarm', 2, {
rotation: 20,
transformOrigin: '100% 0'
}, 'startarms');
tl.to('#newleftarm', 2, {
x: -100,
y: -924,
transformOrigin: '100% 100%'
}, 'startarms');
return tl;
},
coordinates(e) {
const audio = new Audio('https://s3-us-west-2.amazonaws.com/s.cdpn.io/28963/Whoa.mp3'),
walleBox = document.getElementById('walle').getBoundingClientRect(),
walleCoords = walleBox.width / 2 + walleBox.left;
if (this.startArms == 0) {
this.startArms = this.armsTL();
}
this.y = e.clientY / 80 - 2;
if (e.clientX > walleCoords) {
this.x = -(e.clientX / 200);
this.flip = true;
if (this.audioPlay === false) {
audio.play();
this.audioPlay = true;
}
} else {
this.audioPlay = false;
this.x = e.clientX / 200 - 5;
this.flip = false;
TweenMax.set("#righteyeb2", {
scaleX: 1 + (1 - e.clientX / walleCoords) / 5
});
TweenMax.set("#lefteyeb2", {
scaleX: 1 + (1 - e.clientX / walleCoords) / 5
});
TweenMax.set("#walle", {
x: ((e.clientX / walleCoords) * 50) - 40
});
this.startArms.progress(1 - (e.clientX / walleCoords)).pause();
}
},
},
mounted() {
let tl = new TimelineMax({
repeat: -1,
repeatDelay: 2
});
tl.add('redo')
tl.to('#lefteye', 0.5, {
rotation: 5,
repeat: 3,
yoyo: true,
transformOrigin: '100% 50%',
ease: Sine.easeOut
}, 'redo');
tl.to('#righteye', 0.5, {
rotation: -5,
repeat: 3,
yoyo: true,
transformOrigin: '0% 30%',
ease: Sine.easeOut
}, 'redo+=0');
tl.fromTo('#lefteyeball', 0.05, {
scaleY: 1
}, {
scaleY: 0,
repeat: 3,
yoyo: true,
transformOrigin: '50% 50%',
ease: Circ.easeOut
}, 'redo+=4');
tl.fromTo('#righteyeball', 0.05, {
scaleY: 1
}, {
scaleY: 0,
repeat: 3,
yoyo: true,
transformOrigin: '50% 50%',
ease: Circ.easeOut
}, 'redo+=4');
tl.to('#eyecontain', 0.4, {
rotation: -15,
repeat: 1,
yoyo: true,
transformOrigin: '50% 50%',
ease: Sine.easeInOut
}, 'redo+=2');
}
});
TweenMax.to('p', 0.5, {
opacity: 0,
delay: 2,
ease: Sine.easeIn
});以上就是vue状态过度使用什么进行监听的详细内容，更多请关注php中文网其它相关文章！
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