chore: add css var for calc #577
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Code Review
本次 PR 主要为 UniqueBody 组件添加了 --arrow-x 和 --arrow-y 两个 CSS 自定义属性，以便将箭头位置信息暴露给 CSS 进行计算，这是一个很好的改进。代码实现基本正确，并且更新了测试用例以覆盖新功能。
我提出了一些建议以提高代码的健壮性和可维护性：
- 在
UniqueBody.tsx中，建议使用??操作符代替||来处理默认值，并考虑使用模块扩展来代替类型断言，以增强类型安全。 - 在
unique.test.tsx中，建议增强测试断言，以更精确地验证 CSS 变量值的格式。
整体来看，这是一个不错的更新，采纳建议后代码质量会更高。
| '--arrow-x': `${arrowPos?.x || 0}px`, | ||
| '--arrow-y': `${arrowPos?.y || 0}px`, |
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建议使用空值合并操作符（??）代替逻辑或操作符（||），以更明确地处理 null 和 undefined 的情况。当 arrowPos.x 或 arrowPos.y 的值为 0 时，|| 和 ?? 的行为一致，但 ?? 能更清晰地表达“仅在值为 null 或 undefined 时提供默认值”的意图，这是更健壮的做法。
| '--arrow-x': `${arrowPos?.x || 0}px`, | |
| '--arrow-y': `${arrowPos?.y || 0}px`, | |
| '--arrow-x': `${arrowPos?.x ?? 0}px`, | |
| '--arrow-y': `${arrowPos?.y ?? 0}px`, |
| ...motionStyle, | ||
| ...uniqueBgStyle, | ||
| }} | ||
| } as React.CSSProperties} |
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使用 as React.CSSProperties 类型断言来支持 CSS 自定义属性虽然可行，但它会削弱类型安全。一个更佳的实践是使用模块扩展（module augmentation）来为 React.CSSProperties 接口添加自定义属性的类型定义。这样可以在整个项目中安全地使用这些属性，而无需每次都进行类型断言。
你可以在项目中创建一个 .d.ts 类型声明文件（例如 react.d.ts），并添加以下内容：
import 'react';
declare module 'react' {
interface CSSProperties {
'--arrow-x'?: string;
'--arrow-y'?: string;
}
}应用此更改后，就可以移除此处的 as React.CSSProperties 类型断言了。
| expect(computedStyle.getPropertyValue('--arrow-x')).not.toBe(''); | ||
| expect(computedStyle.getPropertyValue('--arrow-y')).not.toBe(''); |
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当前的测试断言 not.toBe('') 只能验证 CSS 变量已被设置，但不够健壮。例如，如果值是 0px（默认值），测试也会通过。为了使测试更精确，建议使用正则表达式来验证值的格式是否为有效的像素值。这可以确保不仅设置了变量，而且其值符合预期格式。
| expect(computedStyle.getPropertyValue('--arrow-x')).not.toBe(''); | |
| expect(computedStyle.getPropertyValue('--arrow-y')).not.toBe(''); | |
| expect(computedStyle.getPropertyValue('--arrow-x')).toMatch(/-?\d+(\.\d+)?px/); | |
| expect(computedStyle.getPropertyValue('--arrow-y')).toMatch(/-?\d+(\.\d+)?px/); |
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## master #577 +/- ##
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Coverage 96.04% 96.05%
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Files 17 17
Lines 936 938 +2
Branches 274 267 -7
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+ Hits 899 901 +2
Misses 37 37 ☔ View full report in Codecov by Sentry. 🚀 New features to boost your workflow:
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给 unique body 添加 css var，用于上游计算。