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核心的区别在于 data 中的属性并不会随赋值变量的改动而改动,而computed 会
<script> let outer_obj = {num: 30} let app = new Vue({ el: "#app", data: { temp: outer_obj, // 这一句一定要加,必须在 data 对象上存在才能让 Vue 将它转换为响应式 num1: outer_obj.num }, computed: { c_num () { return outer_obj.num } } }) </script>
当改变 outer_obj.num 的值,c_num 会随之改变,而 num1 不会
1.computed 是基于它们的响应式依赖进行缓存的。只要 computed 依赖的那个数据不变,computed 就不会重新计算,而 methods 是只要页面有任何数据变化导致数据的更新,methods 就会重新计算
2.computed 不能带参数
Vue 实例在渲染的时候数据解析的顺序问题,结论是props->methods->data->computed->watch->created
The text was updated successfully, but these errors were encountered:
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1.data 和 computed 的区别
核心的区别在于 data 中的属性并不会随赋值变量的改动而改动,而computed 会
当改变 outer_obj.num 的值,c_num 会随之改变,而 num1 不会
2.methods 和 computed 的区别
1.computed 是基于它们的响应式依赖进行缓存的。只要 computed 依赖的那个数据不变,computed 就不会重新计算,而 methods 是只要页面有任何数据变化导致数据的更新,methods 就会重新计算
2.computed 不能带参数
3.Vue 实例在渲染的时候数据解析的顺序
Vue 实例在渲染的时候数据解析的顺序问题,结论是props->methods->data->computed->watch->created
The text was updated successfully, but these errors were encountered: