好的,我为学习目的构建了一个简单的 ToDo 应用程序,并且我面临一个我无法解决的警告:
当我将 ToDo 检查为 Done 时,会引发错误。我尝试将键设置为每个元素的索引,警告停止,但列表更新时呈现了重复的元素。
这是我的组件:
import React from "react";
import TodoTask from "./TodoTask";
const TodoList = ({todos, onTaskCheck}) => {
function renderList() {
return (
todos.map((todo) => {
return <TodoTask key={todo.id} todo={todo} onTaskCheck={onTaskCheck} />
})
);
}
return (
<div>
<h1 className="title is-4">ToDo List</h1>
<ul className="task-list">
{renderList()}
</ul>
</div>
);
};
export default TodoList;
这是减速器:
export default function TodoReducers(state = [], action) {
switch(action.type) {
case "LIST_TODOS":
return [
{id: 1, description: "Task 1", isCompleted: true},
{id: 2, description: "Task 2", isCompleted: true},
{id: 3, description: "Task 3", isCompleted: true},
{id: 4, description: "Task 4", isCompleted: false},
{id: 5, description: "Task 5", isCompleted: false}
];
case "CHECK_TODO":
return [...state, Object.assign({}, action.payload, action.payload.isCompleted = true)];
default:
return state;
}
}
谢谢,抱歉英语不好!