HIsheR
35 lines
1.8 KiB
TypeScript
35 lines
1.8 KiB
TypeScript
import { effect, h, signal } from '@ui-arch/frame';
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import type { RateProps } from './types.js';
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/*** 评分：星标点选，hover 预览移出还原，键盘 ←→/↑↓ 调节，value 信号双向绑定 ***/
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export function rate(props: RateProps): HTMLDivElement {
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const value = props.value;
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const max = props.max ?? 5; // 星标总数缺省 5
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const hover = signal(0); // 预览索引（1 基，0 表示无预览）
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const emit = (v: number): void => { const n = Math.min(max, Math.max(1, v)); value(n); if (props.onChange) props.onChange(n); }; // 写回信号并回调
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const render = (): HTMLElement => {
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const shown = hover() || value(); // 预览优先，无预览显示当前值
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const stars = [];
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for (let i = 1; i <= max; i++) {
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stars.push(h('button', {
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class: `ua-rate-star${i <= shown ? ' is-on' : ''}`,
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type: 'button',
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disabled: props.disabled,
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'aria-label': `${i} 星`,
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onClick: () => emit(i),
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onMouseEnter: () => hover(i),
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}, '★'));
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}
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return h('div', { class: 'ua-rate', role: 'slider', 'aria-label': '评分', 'aria-valuemin': 1, 'aria-valuemax': max, 'aria-valuenow': value(), onMouseLeave: () => hover(0) }, ...stars);
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};
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let el!: HTMLElement; // 当前渲染产物（effect 首跑赋值）
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effect(() => { const next = render(); if (el) el.replaceWith(next); el = next; }); // value/hover 变化整条重渲染（星标少，开销可忽略）
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const keyNav = (e: KeyboardEvent): void => {
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if (e.key !== 'ArrowLeft' && e.key !== 'ArrowRight' && e.key !== 'ArrowUp' && e.key !== 'ArrowDown') return; // 卫语句：只拦截方向键
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e.preventDefault();
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emit(value() + (e.key === 'ArrowRight' || e.key === 'ArrowUp' ? 1 : -1)); // →/↑ 加一分，←/↓ 减一分
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};
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el.addEventListener('keydown', keyNav);
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return el as HTMLDivElement;
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}
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