深入理解SolidJS信号更新机制：解决UI不响应问题的策略

import { render } from "solid-js/web";
import { createSignal, Show, Index } from "solid-js";

// 初始数据，通常通过props传入
const initialOptions = [
    { title: "ReactJs", subtitle: "A front-end framework", selected: false },
    { title: "SolidJS", subtitle: "Lorem ipsum dolor sit amet.", selected: false },
    { title: "MumboJumboJS", subtitle: "null", selected: false }
];

export default function CheckboxArea(props) {
    const [options, setOptions] = createSignal(props.options);
    console.log("Current options:", options()); // 初始输出

    function onClickListener(index: number) {
        console.log("Click detected for index:", index);
        const currentOptions = options(); // 获取当前信号的值
        // 直接修改数组内部元素，但数组引用本身未变
        currentOptions[index].selected = true;
        setOptions(currentOptions); // 尝试设置回同一个引用
        console.log("After update attempt:", options()); // 信号值内部已变，但引用未变
    }

    return(
        <div>
            <Index each={options()}>{(each_option, index) =>
                <div onClick={() => onClickListener(index)} style={{ cursor: 'pointer', padding: '5px', border: '1px solid #eee', marginBottom: '5px' }}>
                    <Show when={options()[index].selected}>
                        <div style={{ fontWeight: 'bold', color: 'blue' }}>✅ {each_option().title}</div>
                    </Show>
                    <Show when={!options()[index].selected}>
                        <div style={{ color: 'gray' }}>{each_option().subtitle}</div>
                    </Show>
                </div>
            }
            </Index>
        </div>
    );
}

render(() => <CheckboxArea options={initialOptions}/>, document.getElementById("app")!);

function onClickListener(index: number) {
    console.log("Click detected for index:", index);
    const currentOptions = options();

    // 创建一个新数组，并更新指定索引的元素
    const updatedOptions = currentOptions.map((item, i) => 
        i === index ? { ...item, selected: true } : item
    );

    setOptions(updatedOptions); // 设置新数组引用
    console.log("After update:", options());
}

// 在创建信号时，传入 { equals: false } 配置
const [options, setOptions] = createSignal(props.options, { equals: false });

// onClickListener 函数可以保持原样，因为相等性检查已被禁用
function onClickListener(index: number) {
    console.log("Click detected for index:", index);
    const currentOptions = options();
    currentOptions[index].selected = true; // 直接修改
    setOptions(currentOptions); // 强制更新，即使引用未变
    console.log("After update:", options());
}