Comsition API开发todolist.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://unpkg.com/vue@next"></script>

</head>

<body>
    <div id="root">
    </div>
    <script>

        // 关于list操作的内容进行封装
        const listRelativeEffect = () => {
            const { reactive } = Vue;
            const list = reactive([]);
            const addItemToList = (item) => {
                list.push(item);
            }

            return { list, addItemToList }
        }

        // 关于input操作的内容进行封装
        const inputRelativeEffect = () => {
            const { ref } = Vue;
            const inputValue = ref('请输入');

            const handleInputChange = (e) => {
                inputValue.value = e.target.value
            }
            return { inputValue, handleInputChange }
        }
        const app = Vue.createApp({
            setup() {

                // 流程调度中转
                const { list, addItemToList } = listRelativeEffect();
                const { inputValue, handleInputChange } = inputRelativeEffect();

                return {
                    inputValue,
                    list,
                    handleInputChange,
                    addItemToList
                }

            },
            template: `
            <div>
                <div>
                    <input :value="inputValue" @input="handleInputChange"/>
                    <button @click="() => {addItemToList(inputValue)}">提交</button>
                </div>
            <ul>
                <li v-for="(item,index) in list" :key="index">{{item}}</li>
            </ul>
            </div>
            `
        });
        const vm = app.mount('#root')
    </script>
</body>

</html>