[feat] Select 컴포넌트 생성

src/components/Button.tsx

@@ -1,7 +1,6 @@
 import React from "react";
 
-import clsx from "clsx";
-import { twMerge } from "tailwind-merge";
+import { cn } from "@/utils/cn";
 
 type ButtonVariant = "primary" | "white";
 type ButtonTextSize = "lg" | "md" | "sm";
@@ -38,14 +37,12 @@ export default function Button({
 }: ButtonProps) {
   const baseClasses = "rounded-md";
 
-  const mergedClasses = twMerge(
-    clsx(
-      baseClasses,
-      textSizeClassMap[textSize],
-      disabled ? disabledClass : variantClassMap[variant],
-      fullWidth && "w-full",
-      className,
-    ),
+  const mergedClasses = cn(
+    baseClasses,
+    textSizeClassMap[textSize],
+    disabled ? disabledClass : variantClassMap[variant],
+    fullWidth && "w-full",
+    className,
   );
 
   return (

src/components/Select.tsx

@@ -0,0 +1,193 @@
+import {
+  useState,
+  useEffect,
+  useRef,
+  ReactNode,
+  SelectHTMLAttributes,
+  useMemo,
+} from "react";
+
+import { DropdownDown, DropdownUp } from "@/assets/icon";
+import { cn } from "@/utils/cn";
+
+const sizeMap = {
+  lg: "py-4 px-5 text-[1rem]",
+  sm: "p-2.5 text-sm",
+} as const;
+
+interface Option {
+  label: string;
+  value: string;
+}
+
+interface SelectProps
+  extends Omit<
+    SelectHTMLAttributes<HTMLButtonElement>,
+    "size" | "onChange" | "disabled"
+  > {
+  id?: string;
+  label?: string;
+  options: Option[];
+  value?: string;
+  onValueChange?: (value: string) => void;
+  placeholder?: string;
+  size?: keyof typeof sizeMap;
+  fullWidth?: boolean;
+  className?: string;
+  wrapperClassName?: string;
+}
+
+// 라벨과 입력 영역을 감싸는 공통 컴포넌트
+function Field({
+  id,
+  label,
+  children,
+}: {
+  id?: string;
+  label?: string;
+  children: ReactNode;
+}) {
+  return (
+    <div>
+      {label && (
+        <label htmlFor={id} className="inline-block mb-2 leading-[1.625rem]">
+          {label}
+        </label>
+      )}
+      {children}
+    </div>
+  );
+}
+
+function Select({
+  id,
+  label,
+  options,
+  value,
+  onValueChange,
+  placeholder = "선택",
+  size = "lg",
+  fullWidth,
+  className,
+  wrapperClassName,
+  ...rest
+}: SelectProps) {
+  const [open, setOpen] = useState(false);
+  const [buttonWidth, setButtonWidth] = useState<number>(0);
+
+  const wrapperRef = useRef<HTMLUListElement>(null);
+  const buttonRef = useRef<HTMLButtonElement>(null);
+
+  const selectedOption = useMemo(() => {
+    return options.find((option) => option.value === value);
+  }, [options, value]);
+
+  const wrapperClassNames = cn(
+    "relative",
+    {
+      "w-full": fullWidth,
+    },
+    wrapperClassName,
+  );
+
+  const buttonClassNames = cn(
+    "flex items-center justify-between rounded-[0.375rem] cursor-pointer",
+    {
+      "w-full": fullWidth,
+      "bg-white border border-gray-30": size === "lg",
+      "bg-gray-10 font-bold": size === "sm",
+    },
+    value ? "text-black" : "text-gray-40",
+    sizeMap[size],
+    className,
+  );
+
+  const listClassNames = cn(
+    "absolute top-full left-0 mt-1 border rounded-[0.375rem] bg-white border-gray-30 text-black shadow-lg z-10 max-h-48 overflow-y-auto",
+  );
+
+  const handleSelect = (selectedValue: string) => {
+    onValueChange?.(selectedValue);
+    setOpen(false);
+  };
+
+  // 드롭다운 외부 클릭 시 닫기
+  useEffect(() => {
+    const handleClickOutside = (event: MouseEvent) => {
+      const target = event.target as Node;
+      if (
+        !buttonRef.current?.contains(target) &&
+        !wrapperRef.current?.contains(target)
+      ) {
+        setOpen(false);
+      }
+    };
+
+    document.addEventListener("mousedown", handleClickOutside);
+    return () => {
+      document.removeEventListener("mousedown", handleClickOutside);
+    };
+  }, []);
+
+  // 버튼 너비 측정 (드롭다운 너비 일치시키기 위함)
+  useEffect(() => {
+    if (buttonRef.current) {
+      const rect = buttonRef.current.getBoundingClientRect();
+      setButtonWidth(rect.width);
+    }
+  }, [open, fullWidth, size, value]); // 버튼 사이즈가 변할 수 있는 경우
+
+  return (
+    <Field id={id} label={label}>
+      <div className={wrapperClassNames}>
+        <button
+          id={id}
+          type="button"
+          ref={buttonRef}
+          onClick={() => setOpen((prev) => !prev)}
+          className={buttonClassNames}
+          {...rest}
+        >
+          {selectedOption?.label || placeholder}
+          {open ? (
+            <DropdownUp className="ml-2" />
+          ) : (
+            <DropdownDown className="ml-2" />
+          )}
+        </button>
+
+        {open && (
+          <ul
+            ref={wrapperRef}
+            className={listClassNames}
+            style={{
+              width: buttonWidth,
+            }}
+          >
+            {options.map((option) => (
+              <li
+                key={option.value}
+                className="border-b border-gray-20 last:border-0"
+              >
+                <button
+                  type="button"
+                  className={cn(
+                    "w-full text-center hover:bg-gray-10 cursor-pointer",
+                    size === "sm"
+                      ? "px-3 py-2 text-sm"
+                      : "px-5 py-3 text-[1rem]",
+                  )}
+                  onClick={() => handleSelect(option.value)}
+                >
+                  {option.label}
+                </button>
+              </li>
+            ))}
+          </ul>
+        )}
+      </div>
+    </Field>
+  );
+}
+
+export default Select;

src/index.css

@@ -2,3 +2,27 @@
 @import "tailwindcss";
 @import "./styles/base.css";
 @import "./styles/utilities.css";
+
+::-webkit-scrollbar {
+  width: 12px;
+}
+
+::-webkit-scrollbar-thumb {
+  background-color: #7d7986;
+  border: 4px solid transparent;
+  background-clip: padding-box;
+  border-radius: 9999px;
+  min-height: 60px;
+}
+
+::-webkit-scrollbar-thumb:hover {
+  background-color: #636169;
+}
+
+::-webkit-scrollbar-track {
+  background: transparent;
+}
+
+::-webkit-scrollbar-button {
+  display: none;
+}