{"id":65872,"date":"2024-06-09T16:12:02","date_gmt":"2024-06-09T12:42:02","guid":{"rendered":"https:\/\/nabfollower.com\/blog\/react-js-useeffect-hook-1a5l\/"},"modified":"2024-06-09T16:12:02","modified_gmt":"2024-06-09T12:42:02","slug":"react-js-useeffect-hook-1a5l","status":"publish","type":"post","link":"https:\/\/nabfollower.com\/blog\/react-js-useeffect-hook-1a5l\/","title":{"rendered":"react js useEffect hook – \u0627\u0646\u062c\u0645\u0646 DEV"},"content":{"rendered":"
\n

\u0642\u0644\u0627\u0628 useEffect \u0628\u0631\u0627\u06cc \u0631\u0633\u06cc\u062f\u06af\u06cc \u0628\u0647 \u0639\u0648\u0627\u0631\u0636 \u062c\u0627\u0646\u0628\u06cc \u0639\u0645\u0644\u06a9\u0631\u062f \u062f\u0631 React \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u0634\u0648\u062f. \u06cc\u06a9 \u0639\u0627\u0631\u0636\u0647 \u062c\u0627\u0646\u0628\u06cc \u062a\u0627\u0628\u0639 \u062f\u0631 \u062c\u0627\u0648\u0627 \u0627\u0633\u06a9\u0631\u06cc\u067e\u062a \u0647\u0631 \u0627\u062b\u0631 \u062e\u0627\u0631\u062c \u0627\u0632 \u0645\u062a\u063a\u06cc\u0631 \u0645\u062d\u0644\u06cc \u062a\u0627\u0628\u0639 \u0627\u0633\u062a. \u0646\u0645\u0648\u0646\u0647 \u0647\u0627\u06cc\u06cc \u0627\u0632 \u0639\u0648\u0627\u0631\u0636 \u062c\u0627\u0646\u0628\u06cc \u0639\u0645\u0644\u06a9\u0631\u062f \u0639\u0628\u0627\u0631\u062a\u0646\u062f \u0627\u0632:
I. \u062f\u0631\u062e\u0648\u0627\u0633\u062a \u0634\u0628\u06a9\u0647
II. \u062f\u0633\u062a\u06a9\u0627\u0631\u06cc DOM
III. \u0648\u0627\u06a9\u0634\u06cc \u062f\u0627\u062f\u0647 \u0647\u0627 \u0627\u0632 \u06cc\u06a9 API
IV. \u062a\u063a\u06cc\u06cc\u0631 \u0645\u0642\u062f\u0627\u0631 \u06cc\u06a9 \u0645\u062a\u063a\u06cc\u0631 \u06cc\u0627 \u06cc\u06a9 \u0634\u06cc \u06a9\u0647 \u062e\u0627\u0631\u062c \u0627\u0632 \u0645\u062d\u062f\u0648\u062f\u0647 \u062a\u0627\u0628\u0639 \u0627\u0633\u062a
V. \u0639\u0645\u0644\u06cc\u0627\u062a setInterval \u06cc\u0627 setTimeout
VI. \u062f\u0633\u062a\u0631\u0633\u06cc \u06cc\u0627 \u062a\u063a\u06cc\u06cc\u0631 API\u0647\u0627\u06cc \u0648\u0628
\u0642\u0644\u0627\u0628 \u0627\u062b\u0631 use \u0647\u0631 \u0628\u0627\u0631 \u06a9\u0647 \u06a9\u0627\u0645\u067e\u0648\u0646\u0646\u062a \u0627\u0631\u0627\u0626\u0647 \u0645\u06cc \u0634\u0648\u062f \u0627\u062c\u0631\u0627 \u0645\u06cc \u0634\u0648\u062f. \u0628\u0647 \u06cc\u0627\u062f \u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u06cc\u062f \u06a9\u0647 \u062c\u062f\u0627 \u0627\u0632 \u0631\u0646\u062f\u0631 \u0627\u0648\u0644\u06cc\u0647 \u0647\u0646\u06af\u0627\u0645\u06cc \u06a9\u0647 \u06cc\u06a9 \u0645\u0624\u0644\u0641\u0647 \u0628\u0631\u0627\u06cc \u0627\u0648\u0644\u06cc\u0646 \u0628\u0627\u0631 \u062f\u0631 DOM \u0628\u0627\u0631\u06af\u0630\u0627\u0631\u06cc \u0645\u06cc \u0634\u0648\u062f\u060c \u0647\u0631 \u0632\u0645\u0627\u0646 \u06a9\u0647 \u062a\u063a\u06cc\u06cc\u0631 \u0648\u0636\u0639\u06cc\u062a \u0648\u062c\u0648\u062f \u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u062f\u060c \u0645\u0624\u0644\u0641\u0647 \u0631\u0646\u062f\u0631 \u0645\u06cc \u0634\u0648\u062f.<\/p>\n

\n

\u0646\u062d\u0648\u0647 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0642\u0644\u0627\u0628 useEffect
\n<\/h2>\n

\u0627\u0648\u0644 \u0627\u0632 \u0647\u0645\u0647\u060c \u0645\u0627 \u0646\u06cc\u0627\u0632 \u062f\u0627\u0631\u06cc\u0645\u061b
\u2022 \u0648\u0627\u0631\u062f \u06a9\u0631\u062f\u0646 useEffect \u0627\u0632 react
import { useState, useEffect } from \"react\";<\/code>
\u2022 \u062c\u0627\u06cc\u06cc \u062f\u0631 \u062c\u0632\u0621 \u062e\u0648\u062f\u060c \u0642\u0628\u0644 \u0627\u0632 \u0639\u0628\u0627\u0631\u062a return\u060c \u0642\u0644\u0627\u0628 useEffect \u0631\u0627 \u0628\u0627 \u062f\u0648 \u0622\u0631\u06af\u0648\u0645\u0627\u0646 \u0641\u0631\u0627\u062e\u0648\u0627\u0646\u06cc \u06a9\u0646\u06cc\u062f. <\/p>\n

\u2022 \u0627\u0648\u0644\u06cc\u0646 \u0622\u0631\u06af\u0648\u0645\u0627\u0646 \u06cc\u06a9 \u062a\u0627\u0628\u0639 callback \u0627\u0633\u062a \u06a9\u0647 \u062d\u0627\u0648\u06cc \u062f\u0633\u062a\u0648\u0631\u0627\u0644\u0639\u0645\u0644 \u0647\u0627\u06cc\u06cc \u0627\u0633\u062a \u06a9\u0647 \u0645\u06cc \u062e\u0648\u0627\u0647\u06cc\u0645 \u0647\u0631 \u0632\u0645\u0627\u0646 \u06a9\u0647 useEffect \u0631\u0627\u0647 \u0627\u0646\u062f\u0627\u0632\u06cc \u0634\u062f \u0627\u062c\u0631\u0627 \u06a9\u0646\u06cc\u0645. <\/p>\n

\u0622\u0631\u06af\u0648\u0645\u0627\u0646 \u0627\u062e\u062a\u06cc\u0627\u0631\u06cc \u062f\u0648\u0645 \u0622\u0631\u0627\u06cc\u0647 \u0627\u06cc \u0627\u0632 \u0648\u0627\u0628\u0633\u062a\u06af\u06cc \u0647\u0627 \u0627\u0633\u062a \u06a9\u0647 \u062a\u0639\u06cc\u06cc\u0646 \u0645\u06cc \u06a9\u0646\u062f useEffect \u0686\u0647 \u0632\u0645\u0627\u0646\u06cc \u0627\u062c\u0631\u0627 \u0634\u0648\u062f. \u0627\u06af\u0631 \u0622\u0631\u0627\u06cc\u0647 \u062e\u0627\u0644\u06cc \u0628\u0627\u0634\u062f\u060c useEffect \u062a\u0646\u0647\u0627 \u06cc\u06a9 \u0628\u0627\u0631 \u067e\u0633 \u0627\u0632 \u0631\u0646\u062f\u0631 \u0627\u0648\u0644\u06cc\u0647 \u0627\u062c\u0631\u0627 \u0645\u06cc \u0634\u0648\u062f. \u0627\u06af\u0631 \u0622\u0631\u06af\u0648\u0645\u0627\u0646 \u0648\u0627\u0628\u0633\u062a\u06af\u06cc \u062d\u0630\u0641 \u0634\u0648\u062f\u060c useEffect \u0647\u0631 \u0632\u0645\u0627\u0646 \u06a9\u0647 \u06cc\u06a9 \u062d\u0627\u0644\u062a \u062a\u063a\u06cc\u06cc\u0631 \u06a9\u0646\u062f \u0641\u0639\u0627\u0644 \u0645\u06cc \u0634\u0648\u062f. \u0627\u06af\u0631 \u0645\u0642\u0627\u062f\u06cc\u0631 \u062f\u0631 \u062f\u0627\u062e\u0644 \u0622\u0631\u0627\u06cc\u0647 \u0648\u0627\u0628\u0633\u062a\u06af\u06cc \u0627\u0631\u0627\u0626\u0647 \u0634\u0648\u062f\u060c useEffect \u062a\u0646\u0647\u0627 \u0632\u0645\u0627\u0646\u06cc \u0641\u0639\u0627\u0644 \u0645\u06cc \u0634\u0648\u062f \u06a9\u0647 \u062a\u063a\u06cc\u06cc\u0631 \u062d\u0627\u0644\u062a \u062f\u0631 \u0647\u0631 \u06cc\u06a9 \u0627\u0632 \u0622\u0646 \u0645\u0642\u0627\u062f\u06cc\u0631 \u0648\u062c\u0648\u062f \u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u062f.<\/p>\n

\u2022 \u0646\u062d\u0648<\/p>\n

\n
useEffect(()=>{\n    \/\/ excecute side effect\n  }, [an array of values that the effect depends on]);\n\n<\/code><\/pre>\n
\n
\n    \u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
*\u0645\u062b\u0627\u0644 *<\/em><\/p>\n
\n
import { useState, useEffect } from \"react\";\n\nconst Home = () => {\n  const [name, setName] = useState(\"\");\n  const changeName = () => {\n    const userName = prompt(\"what is your name\");\n    setName(userName);\n  };\n\n  useEffect(() => {\n    alert(`welcome ${name}`);\n  }, [name]);\n\n  return (\n    <>\n      \n