\ub9ac\uc561\ud2b8\ub294 \ucef4\ud3ec\ub10c\ud2b8\ub97c \uae30\ubc18\uc73c\ub85c \ud55c \uc0ac\uc6a9\uc790 \uc778\ud130\ud398\uc774\uc2a4(UI)\ub97c \uad6c\ucd95\ud558\ub294 \ub370 \uc0ac\uc6a9\ub418\ub294 JavaScript \ub77c\uc774\ube0c\ub7ec\ub9ac\uc785\ub2c8\ub2e4. \uc774 \uac15\uc88c\uc5d0\uc11c\ub294 React\uc758 Context API\ub97c \ud65c\uc6a9\ud558\uc5ec \ucef4\ud3ec\ub10c\ud2b8 \ud2b8\ub9ac\uc5d0 \ub370\uc774\ud130\ub97c \uacf5\uae09\ud558\ub294 \ubc29\ubc95\uc5d0 \ub300\ud574 \uae4a\uc774 \uc788\uac8c \ub2e4\ub904\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. Context\ub294 \ub9ac\uc561\ud2b8\uc758 \uac15\ub825\ud55c \uae30\ub2a5 \uc911 \ud558\ub098\ub85c, \ucef4\ud3ec\ub10c\ud2b8 \uac04\uc5d0 \ub370\uc774\ud130\ub97c \ud6a8\uc728\uc801\uc73c\ub85c \uc804\ub2ec\ud560 \uc218 \uc788\ub3c4\ub85d \ub3c4\uc640\uc90d\ub2c8\ub2e4.<\/p>\n<\/header>\n Context API\ub294 \ub9ac\uc561\ud2b8\uc5d0\uc11c \ub370\uc774\ud130\uac00 \ud544\uc694 \uc5c6\ub294 \ucef4\ud3ec\ub10c\ud2b8\uc5d0\uac8c\ub3c4 \ub370\uc774\ud130\ub97c \uc804\ub2ec\ud560 \uc218 \uc788\uac8c \ud558\ub294 \ub3c4\uad6c\uc785\ub2c8\ub2e4. \uae30\ubcf8\uc801\uc73c\ub85c props drilling(\ud504\ub86d\uc2a4\ub97c \uc544\ub798\ub85c \uc804\ub2ec\ud558\ub294 \uacfc\uc815)\uc744 \ud53c\ud558\ub294 \ub370\uc5d0 \uc720\uc6a9\ud569\ub2c8\ub2e4. Context\ub97c \uc0ac\uc6a9\ud558\uba74 \uc0c1\uc704 \ucef4\ud3ec\ub10c\ud2b8\uc5d0\uc11c \ud558\uc704 \ucef4\ud3ec\ub10c\ud2b8\ub85c \uc9c1\uc811\uc801\uc73c\ub85c props\ub97c \uc804\ub2ec\ud560 \ud544\uc694 \uc5c6\uc774 \ub370\uc774\ud130\ub97c \uc804\ub2ec\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n Context\ub294 \uc8fc\ub85c \uc804\uc5ed \uc0c1\ud0dc\uad00\ub9ac\ub098 \ub2e4\uc218\uc758 \ud558\uc704 \uc694\uc18c\uc5d0 \ud544\uc694\ud55c \ub370\uc774\ud130\ub97c \uacf5\uc720\ud560 \ub54c \uc720\uc6a9\ud569\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uc0ac\uc6a9\uc790 \uc778\uc99d \uc815\ubcf4, UI \uc5b8\uc5b4 \uc124\uc815, \ud14c\ub9c8 \uc815\ubcf4 \ub4f1\uc744 Context\ub97c \uc0ac\uc6a9\ud558\uc5ec \uad00\ub9ac\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/section>\n Context API\ub294 \ub2e4\uc74c\uc758 \uc8fc\uc694 \uad6c\uc131 \uc694\uc18c\ub85c \uc774\ub8e8\uc5b4\uc838 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n Context\ub97c \uc0dd\uc131\ud558\ub294 \ubc29\ubc95\uc744 \uccab \ubc88\uc9f8\ub85c \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \ub2e4\uc74c \uc608\uc81c\ub97c \ud1b5\ud574 \uac04\ub2e8\ud55c Context\ub97c \ub9cc\ub4e4\uc5b4 \uc0ac\uc6a9\ud560 \uc218 \uc788\ub294 \ubc29\ubc95\uc744 \uc124\uba85\ud569\ub2c8\ub2e4:<\/p>\n \uc774 \uc608\uc81c\uc5d0\uc11c Context API\ub97c \uc0ac\uc6a9\ud560 \ub54c\ub294 \uae30\ubcf8\uc801\uc778 \uc0ac\uc6a9\ubc95 \uc678\uc5d0\ub3c4 \uc5ec\ub7ec \uac00\uc9c0 \uace0\ub824\ud574\uc57c \ub420 \uc0ac\ud56d\ub4e4\uc774 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \uc139\uc158\uc5d0\uc11c\ub294 Context\ub97c \ub354 \ud6a8\uacfc\uc801\uc73c\ub85c \uc0ac\uc6a9\ud558\ub294 \uc5ec\ub7ec \uc804\ub7b5\ub4e4\uc5d0 \ub300\ud574 \uc124\uba85\ud569\ub2c8\ub2e4.<\/p>\n \ud558\ub098\uc758 \uc5b4\ud50c\ub9ac\ucf00\uc774\uc158\uc5d0\uc11c \uc5ec\ub7ec \uac1c\uc758 Context\ub97c \uc0ac\uc6a9\ud558\ub294 \uac83\uc774 \uac00\ub2a5\ud569\ub2c8\ub2e4. \ub2e4\uc591\ud55c \ub370\uc774\ud130\ub97c \uac01\uac01\uc758 Context\ub85c \ubd84\ub9ac\ud558\uba74 \ucf54\ub4dc\uac00 \uac04\uacb0\ud574\uc9c0\uba70 \uc720\uc9c0\ubcf4\uc218\uc131\uc774 \ub192\uc544\uc9d1\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uc0ac\uc6a9\uc790 \uc124\uc815\uacfc \ud14c\ub9c8 \uc124\uc815, \uc5b8\uc5b4 \uc124\uc815\uc744 \uac01\uae30 \ub2e4\ub978 Context\ub85c \uad00\ub9ac\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n Context\ub97c \uc0ac\uc6a9\ud560 \ub54c\ub294 \uc131\ub2a5\uc774 \uc800\ud558\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4. Context\uc5d0 \ubcc0\uacbd\uc774 \uc0dd\uae30\uba74 \ud558\uc704 \ucef4\ud3ec\ub10c\ud2b8\uac00 \ubaa8\ub450 \ub2e4\uc2dc \ub80c\ub354\ub9c1\ub429\ub2c8\ub2e4. \uc774\ub97c \ubc29\uc9c0\ud558\uae30 \uc704\ud574 \ub354 \uc138\ubd84\ud654\ub41c Context\ub85c \ub098\ub204\uac70\ub098, Memoization\uc744 \ud65c\uc6a9\ud558\ub294 \ubc29\ubc95\uc774 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n Context API\uc640 Redux\ub294 \ubaa8\ub450 \uc804\uc5ed \uc0c1\ud0dc \uad00\ub9ac\ub97c \uc704\ud55c \ubc29\ubc95\uc785\ub2c8\ub2e4. \ud558\uc9c0\ub9cc Redux\ub294 \ubcf5\uc7a1\ud55c \uc0c1\ud0dc \uad00\ub9ac\ub97c \uc704\ud55c \ud328\ud134\uc744 \uc81c\uc2dc\ud558\uace0, \ubbf8\ub4e4\uc6e8\uc5b4\uc640 \uac19\uc740 \ucd94\uac00\uc801\uc778 \uae30\ub2a5\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \uac04\ub2e8\ud55c \uc0c1\ud0dc \uad00\ub9ac\uc5d0\ub294 Context API\uac00 \uc801\ud569\ud558\uc9c0\ub9cc, \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc774 \ubcf5\uc7a1\ud574\uc9c8\uc218\ub85d Redux\ub97c \uace0\ub824\ud558\ub294 \uac83\uc774 \uc88b\uc2b5\ub2c8\ub2e4.<\/p>\n<\/section>\n \uc774\uc81c \uc2e4\uc2b5\uc744 \ud1b5\ud574 Context API\ub97c \ud65c\uc6a9\ud574\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uc544\ub798\ub294 \uc0ac\uc6a9\uc790 \uc778\uc99d \uc0c1\ud0dc\ub97c \uad00\ub9ac\ud558\ub294 \uac04\ub2e8\ud55c \uc608\uc81c\uc785\ub2c8\ub2e4.<\/p>\n1. Context API\ub780?<\/h2>\n
2. Context API\uc758 \uad6c\uc131 \uc694\uc18c<\/h2>\n
\n
React.createContext()<\/code> \ud568\uc218\ub97c \uc0ac\uc6a9\ud558\uc5ec Context\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4.<\/li>\nuseContext<\/code> \ud6c5\uc744 \uc0ac\uc6a9\ud558\uc5ec \ud568\uc218\ud615 \ucef4\ud3ec\ub10c\ud2b8\uc5d0\uc11c Context\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<\/ul>\n<\/section>\n3. Context\uc758 \uc0dd\uc131 \ubc0f \uae30\ubcf8 \uc0ac\uc6a9\ubc95<\/h2>\n
\nimport React, { createContext, useContext, useState } from 'react';\n\n\/\/ 3.1. Context \uc0dd\uc131\nconst MyContext = createContext();\n\n\/\/ 3.2. Provider \ucef4\ud3ec\ub10c\ud2b8 \uc0dd\uc131\nconst MyProvider = ({ children }) => {\n const [value, setValue] = useState('\uc548\ub155\ud558\uc138\uc694, \ub9ac\uc561\ud2b8!');\n\n return (\n {value}<\/h1>;\n};\n\n\/\/ 3.4. App \ucef4\ud3ec\ub10c\ud2b8\nconst App = () => (\n
MyContext<\/code>\ub97c \uc0dd\uc131\ud558\uace0, MyProvider<\/code>\ub97c \ud1b5\ud574 \ud558\uc704 \ucef4\ud3ec\ub10c\ud2b8\uc5d0\uac8c \ub370\uc774\ud130\ub97c \uacf5\uae09\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4. MyComponent<\/code>\uc5d0\uc11c\ub294 useContext<\/code> \ud6c5\uc744 \uc0ac\uc6a9\ud558\uc5ec Context\uc758 \uac12\uc744 \uac00\uc838\uc635\ub2c8\ub2e4.<\/p>\n<\/section>\n4. \ub9ac\uc561\ud2b8 Context\uc758 \uace0\uae09 \uc0ac\uc6a9\ubc95<\/h2>\n
4.1. \ub2e4\uc911 Context \uc0ac\uc6a9\ud558\uae30<\/h3>\n
\nconst ThemeContext = createContext();\nconst LanguageContext = createContext();\n <\/code><\/pre>\n4.2. Context\uc758 \uc131\ub2a5 \ucd5c\uc801\ud654<\/h3>\n
\nconst MyComponent = React.memo(() => {\n const { value } = useContext(MyContext);\n return {value}<\/h1>;\n});\n <\/code><\/pre>\n
4.3. Context\uc640 Redux \ube44\uad50<\/h3>\n
5. \ub9ac\uc561\ud2b8 \uc2e4\uc2b5 \uc608\uc81c<\/h2>\n
\nconst AuthContext = createContext();\n\nconst AuthProvider = ({ children }) => {\n const [isAuthenticated, setIsAuthenticated] = useState(false);\n\n const login = () => setIsAuthenticated(true);\n const logout = () => setIsAuthenticated(false);\n\n return (\n