vue class与style 绑定详解——小白速会

    <div id="app3">
        <div :class="{'success':isSuccess,'fail':isFail}">对象绑定class</div>　　//简单的处理直接使用数据来判断
        <div :class="classes">计算属性绑定class</div>　　//当class的表达式过长或逻辑复杂时，使用计算属性
    </div>

var app3 = new Vue({
    el: '#app3',
    data: {
        isSuccess: true,
        isFail: false,
        error: false
    },
    computed: {
        classes: function(){
            return {
                success: this.isSuccess && !this.error,
                fail: this.isFail || !this.error
            }
        }
    }
});

    <div id="app4">
        <div :class="[successCls,failCls]">绑定多个class属性</div>　　//用于来绑定多个class属性
        <div :class="[{'success':isSuccess},failCls]">绑定多个class属性一</div>　　//动态的判断添加那些class属性，是最常用的
    </div>

var app4 = new Vue({
    el: '#app4',
    data: {
        successCls: 'success',
        failCls: 'fail',
        isSuccess: true,
        isFail: false
    }
});

<div id= ”app”>
　　<button :class= ”classes”></button>
</div>
var app = new Vue({
    el: '#app',
    data:{
        size : 'large',
        disabled : true
    },
    computed: {
        classes: function(){
            return [
                'btn',
                {
                    ['btn-'+this.size]: this.size,
                    ["btn-disabled"]: this.disabled
                }
            ]
        }
    }
});

    <div id="app5">
        <my-component :class="{'success': isSuccess}"></my-component>
    </div>

Vue.component('my-component',{
   template: '<div class="fail">绑定组件class属性</div>'
});
var app5 = new Vue({
   el: '#app5',
   data: {
       isSuccess: true
   }
});

    <div id="app6">
        <div :style="{'color':color,'fontSize':fontSize+'px'}">文本</div>
    </div>

var app6 = new Vue({
   el: '#app6',
   data: {
       color: 'red',
       fontSize: 14
    }
});

    <div id="app6">
        <div :style="style">文本</div>
    </div>

var app6 = new Vue({
   el: '#app6',
   data: {
       style: {
           color: 'red',
           fontSize: 14
       }
    }
});