vue 通过下拉框组件学习vue中的父子通讯(2)
总结
- 从以上的示例可以看出来,父组件传入数据,需要在父组件中线绑定一个属性,挂载需要传入的数据;
- 子组件接收父组件的数据通过 props 方法来接收;
- 子组件传递数据需要使用 emit 方法来绑定父组件中事先设定好的方法,从而动态传递操作后需要的数据
最终效果如下:
附上组件中的css,仅供参考:
.select-box{ position: relative; max-width: 250px; line-height: 35px; margin: 50px auto; } .select-title{ position: relative; padding: 0 30px 0 10px; border: 1px solid #d8dce5; border-radius: 5px; transition-duration: 300ms; cursor: pointer; } .select-title:after{ content: ''; position: absolute; height: 0; width: 0; border-top: 6px solid #d8dce5; border-left: 6px solid transparent; border-right: 6px solid transparent; right: 9px; top: 0; bottom: 0; margin: auto; transition-duration: 300ms; transition-timing-function: ease-in-out; } .select-title-active{ border-color: #409eff; } .select-title-active:after{ transform: rotate(-180deg); border-top-color: #409eff; } .select-options{ position: absolute; padding:10px 0; top: 45px; border:1px solid #d8dce5; width: 100%; border-radius: 5px; } .select-option-item{ padding:0 10px; cursor: pointer; transition-duration: 300ms; } .select-option-item:hover,.select-option-active{ background: #f1f1f1; color: #409eff; } <!--箭头css--> .arrow-top{ position: absolute; height: 0; width: 0; top: -7px; border-bottom: 7px solid #d8dce5; border-left: 7px solid transparent; border-right: 7px solid transparent; left: 0; right: 0; margin: auto; z-index: 99; } .arrow-top:after{ content: ''; position: absolute; display: block; height: 0; width: 0; border-bottom: 6px solid #fff; border-left: 6px solid transparent; border-right: 6px solid transparent; left: -6px; top: 1px; z-index: 99; } <!--下拉框显示隐藏动画--> .slide-down-enter-active,.slide-down-leave{ transition: all .3s ease-in-out; transform-origin:0 top; transform: scaleY(1); } .slide-down-enter{ transform: scaleY(0); } .slide-down-leave-active{ transition: all .3s ease-in-out; transform-origin:0 top; transform: scaleY(0); }
总结
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