:style :class

2.1、html代码

1. <div id="app">
2. 　<!--整个数组-->
3. 　<div v-bind:style="[baseStyles, overridingStyles]">{{[baseStyles, overridingStyles]}}</div>
4. 　<!--数组+三元表达式-->
5. 　<div v-bind:style="[{backgroundColor:isActive ? '#f00' : '#00f'},baseStyles]">如果isActive==true,背景红色</div>
6. 　<!--对象+数组-->
7. 　<div v-bind:style="[{ baseStyles: Active }, overridingStyles]">{{[{ baseStyles: Active }, overridingStyles]}}</div>
8. </div>

<span :class="{'fonts':ruleForm.BMI=='请完善身高体重'}">{{ruleForm.BMI}}</span>
<!--<span :style="{color:ruleForm.BMI=='请完善身高体重' ? 'red' : blue}">{{ruleForm.BMI}}</span>-->