first commit

src/components/CapsuleSwitch.tsx

@@ -0,0 +1,103 @@
+/* eslint-disable react-hooks/exhaustive-deps */
+
+import React, { useEffect, useRef, useState } from 'react';
+
+interface CapsuleSwitchProps {
+  options: { label: string; value: string }[];
+  active: string;
+  onChange: (value: string) => void;
+  className?: string;
+}
+
+const CapsuleSwitch: React.FC<CapsuleSwitchProps> = ({
+  options,
+  active,
+  onChange,
+  className,
+}) => {
+  const containerRef = useRef<HTMLDivElement>(null);
+  const buttonRefs = useRef<(HTMLButtonElement | null)[]>([]);
+  const [indicatorStyle, setIndicatorStyle] = useState<{
+    left: number;
+    width: number;
+  }>({ left: 0, width: 0 });
+
+  const activeIndex = options.findIndex((opt) => opt.value === active);
+
+  // 更新指示器位置
+  const updateIndicatorPosition = () => {
+    if (
+      activeIndex >= 0 &&
+      buttonRefs.current[activeIndex] &&
+      containerRef.current
+    ) {
+      const button = buttonRefs.current[activeIndex];
+      const container = containerRef.current;
+      if (button && container) {
+        const buttonRect = button.getBoundingClientRect();
+        const containerRect = container.getBoundingClientRect();
+
+        if (buttonRect.width > 0) {
+          setIndicatorStyle({
+            left: buttonRect.left - containerRect.left,
+            width: buttonRect.width,
+          });
+        }
+      }
+    }
+  };
+
+  // 组件挂载时立即计算初始位置
+  useEffect(() => {
+    const timeoutId = setTimeout(updateIndicatorPosition, 0);
+    return () => clearTimeout(timeoutId);
+  }, []);
+
+  // 监听选中项变化
+  useEffect(() => {
+    const timeoutId = setTimeout(updateIndicatorPosition, 0);
+    return () => clearTimeout(timeoutId);
+  }, [activeIndex]);
+
+  return (
+    <div
+      ref={containerRef}
+      className={`relative inline-flex bg-gray-300/80 rounded-full p-1 dark:bg-gray-700 ${
+        className || ''
+      }`}
+    >
+      {/* 滑动的白色背景指示器 */}
+      {indicatorStyle.width > 0 && (
+        <div
+          className='absolute top-1 bottom-1 bg-white dark:bg-gray-500 rounded-full shadow-sm transition-all duration-300 ease-out'
+          style={{
+            left: `${indicatorStyle.left}px`,
+            width: `${indicatorStyle.width}px`,
+          }}
+        />
+      )}
+
+      {options.map((opt, index) => {
+        const isActive = active === opt.value;
+        return (
+          <button
+            key={opt.value}
+            ref={(el) => {
+              buttonRefs.current[index] = el;
+            }}
+            onClick={() => onChange(opt.value)}
+            className={`relative z-10 w-16 px-3 py-1 text-xs sm:w-20 sm:py-2 sm:text-sm rounded-full font-medium transition-all duration-200 cursor-pointer ${
+              isActive
+                ? 'text-gray-900 dark:text-gray-100'
+                : 'text-gray-700 hover:text-gray-900 dark:text-gray-400 dark:hover:text-gray-100'
+            }`}
+          >
+            {opt.label}
+          </button>
+        );
+      })}
+    </div>
+  );
+};
+
+export default CapsuleSwitch;