可调整scalseNum来改变缩放比例
<div id="app">
<div class="box" :style="{
'transformOrigin':'center top',
'transform':`scale(${scalseNum},${scalseNum})`,'-webkit-transform':`scale(${scalseNum},${scalseNum})`,'-moz-transform':`scale(${scalseNum},${scalseNum})`,'-o-transform':`scale(${scalseNum},${scalseNum})`,'-ms-transform':`scale(${scalseNum},${scalseNum})`
}">
<h1>缩放的盒子 比例是：{{scalseNum}}</h1>
</div>
</div>
