<script setup lang="ts"> import { computed, ref } from 'vue'; const source = ref(0); // 计算属性,具有 getter 和 setter const computedValue = computed({ get() { return source.value * 2; }, set(newValue) { // 修改
为计算属性配置修改方法,如下: import{ computed, ref}from'vue'constmsg =ref('-')// 计算属性constcomputedMsg: any =computed({get() {// 这里返回的值是获取计算属性的值returnmsg.value+'-'},set(newValue) {// 参数newValue是被修改后的值// 这里是修改的具体逻辑/* 注意这里不要使用下面的方法...
Unable to update computed variable second time. (Vue3 ... Getting a warning error like “Write operation failed: computed value is readonly”. My requirement is , I want to store initial fetched data... Read more > vue3之fix: [Vue warn]: Write operation failed: computed...
🐛 The bug At the moment, if a component that calls useFetch has a computed property returned from setup, it will give the following error: [Vue warn]: Computed property was assigned to but it has no setter. It still works correctly, but ...
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if (onlyGetter) { getter = getterOrOptions setter = __DEV__ ? () => { console.warn('Write operation failed: computed value is readonly') } : NOOP } else { getter = getterOrOptions.get setter = getterOrOptions.set } const cRef = new ComputedRefImpl(getter, setter, onlyGetter ||...
const computedName = computed(() => { return (first: string, last: string) => { return first + "." + last + "-" + "nickName" + nickName.value; }; }); <template> Hello My Name is {{ computedName("wang", "haoyu") }} </template> 此时,页面初始化时会...
Write operation failed: computed value is readonly 因此,还是需要改回原先的模式,即:若数据待绑定的目标组件会修改所绑定的对象的值时,应当由业务组件负责数据的初始化,在业务组件内修改数据并将修改同步到状态库;状态库只负责保存数据副本,以便其他组件获取。同理,若某些公共数据需要由状态库负责维护时,业务组件...
console.warn('Write operation failed: computed value is readonly') } : NOOP } else { getter = getterOrOptions.get setter = getterOrOptions.set } let dirty = true let value: T let computed: ComputedRef const runner = effect(getter, { ...
在模板中访问时,无需通过.value属性,它会自动展开 在reactive对象中访问时,无需通过.value属性,它会自动展开 3. computed computed()函数用来创建计算属性,函数的返回值是一个ref的实例 只读的计算属性 可读可写的计算属性 4. readonly readonly()函数接收一个对象(普通或响应式),返回一个原始对象的只读代理对象...