this.todos.filter((t) => t !== todo)
时间: 2024-06-03 18:06:48 浏览: 10
This code is filtering out the specific "todo" item from the "todos" array. It is using the filter method, which creates a new array with all elements that pass the test implemented by the provided function. In this case, the test is checking if each "t" element is not equal to the "todo" item.
The arrow function syntax is used to define the function that is passed to the filter method. The "t" parameter represents each element in the "todos" array, and the !== operator checks if it is not equal to the "todo" item.
Overall, this code is removing the "todo" item from the "todos" array and returning a new array with all other items.
相关问题
vue编写Todo List
作为AI语言模型,我可以为您提供思路和代码片段。
思路:
1. 创建一个TodoList组件,其中包含一个输入框和一个待办事项列表。
2. 当用户在输入框中输入信息并按下回车键时,将该信息添加到待办事项列表中。
3. 当用户点击待办事项列表中的某个项目时,将该项目标记为已完成。
4. 可以添加一个按钮,以便用户可以清除已完成的项目。
代码片段:
```
<template>
<div>
<h1>Todo List</h1>
<input v-model="newTodo" @keyup.enter="addTodo" placeholder="Add new todo">
<ul>
<li v-for="(todo, index) in todos" :key="index" :class="{ completed: todo.completed }" @click="toggleCompletion(todo)">
{{ todo.title }}
</li>
</ul>
<button @click="clearCompleted">Clear completed</button>
</div>
</template>
<script>
export default {
data() {
return {
newTodo: '',
todos: []
}
},
methods: {
addTodo() {
if (this.newTodo.trim() !== '') {
this.todos.push({
title: this.newTodo.trim(),
completed: false
})
this.newTodo = ''
}
},
toggleCompletion(todo) {
todo.completed = !todo.completed
},
clearCompleted() {
this.todos = this.todos.filter(todo => !todo.completed)
}
}
}
</script>
<style>
.completed {
text-decoration: line-through;
}
</style>
```
以上是一个简单的Todo List组件,您可以根据需求进行修改和扩展。
vue的store.getter可以传参数吗
是的,Vue的store.getter可以传递参数。在Vuex中,getter可以接受两个参数,第一个参数是state对象,第二个参数是getter自定义传入的参数。getter可以在组件中通过$store.getters来访问。例如,假设有如下getter:
```
const store = new Vuex.Store({
state: {
todos: [
{ id: 1, text: 'todo1', done: true },
{ id: 2, text: 'todo2', done: false },
{ id: 3, text: 'todo3', done: true }
]
},
getters: {
doneTodos: state => {
return state.todos.filter(todo => todo.done)
},
getTodoById: (state) => (id) => {
return state.todos.find(todo => todo.id === id)
}
}
})
```
在组件中可以通过以下方式来访问getter:
```
computed: {
doneTodos () {
return this.$store.getters.doneTodos
},
todoById () {
return this.$store.getters.getTodoById(2)
}
}
```
在上面的例子中,getTodoById接受一个参数id,通过返回一个函数的方式来接收参数。这样我们在组件中调用getTodoById时就可以传递id参数了。
相关推荐
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)