{"id":55869,"date":"2024-04-04T20:13:36","date_gmt":"2024-04-04T11:13:36","guid":{"rendered":"https:\/\/kinqsta.com\/jp\/?p=55869&#038;post_type=knowledgebase&#038;preview_id=55869"},"modified":"2025-10-02T04:44:46","modified_gmt":"2025-10-01T19:44:46","slug":"react-hook-useeffect-has-a-missing-dependency","status":"publish","type":"post","link":"https:\/\/kinqsta.com\/jp\/blog\/react-hook-useeffect-has-a-missing-dependency\/","title":{"rendered":"\u300cReact Hook useEffect has a missing dependency\u300d\u30a8\u30e9\u30fc\u306e\u89e3\u6c7a\u65b9\u6cd5"},"content":{"rendered":"<p><a href=\"https:\/\/kinqsta.com\/jp\/blog\/what-is-react-js\/\">React<\/a>\u306e<code>useEffect<\/code>\u30d5\u30c3\u30af\u306f\u3001\u30d0\u30fc\u30b8\u30e7\u30f316.8\u3067\u5c0e\u5165\u3055\u308c\u3066\u4ee5\u6765\u3001<a href=\"https:\/\/kinqsta.com\/jp\/blog\/react-components-library\/\">React\u30e9\u30a4\u30d6\u30e9\u30ea<\/a>\u306e\u4eba\u6c17\u6a5f\u80fd\u3067\u3059\u3002\u95a2\u6570\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u5185\u90e8\u3067<a href=\"https:\/\/kinqsta.com\/jp\/blog\/graphql-vs-rest\/\">\u30c7\u30fc\u30bf\u306e\u53d6\u5f97<\/a>\u3001DOM\u306e\u66f4\u65b0\u3001\u30a4\u30d9\u30f3\u30c8\u306e\u8cfc\u8aad\u306a\u3069\u306e\u526f\u4f5c\u7528\uff08\u30b5\u30a4\u30c9\u30a8\u30d5\u30a7\u30af\u30c8\uff09\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u3057\u304b\u3057\u3001<code>useEffect<\/code>\u30d5\u30c3\u30af\u4f7f\u7528\u6642\u306b\u306f\u3001\u6642\u3068\u3057\u3066\u554f\u984c\u304c\u751f\u3058\u308b\u3053\u3068\u3082\u3002\u4f8b\u3048\u3070\u3001\u300cReact Hook useEffect has a missing dependency. Either include it or remove the dependency array.\u300d\uff08React\u306euseEffect\u30d5\u30c3\u30af\u306b\u4f9d\u5b58\u95a2\u4fc2\u304c\u3042\u308a\u307e\u305b\u3093\u3002\u3053\u308c\u3092\u30a4\u30f3\u30af\u30eb\u30fc\u30c9\u3059\u308b\u304b\u3001\u4f9d\u5b58\u95a2\u4fc2\u306e\u914d\u5217\u3092\u524a\u9664\u3057\u3066\u304f\u3060\u3055\u3044\uff09\u306f\u3001\u958b\u767a\u8005\u304c\u906d\u9047\u3059\u308b\u4e00\u822c\u7684\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3067\u3059\u3002<\/p>\n<p>\u4eca\u56de\u306f\u3053\u306e\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u7d10\u89e3\u304d\u3001\u89e3\u6c7a\u3059\u308b\u65b9\u6cd5\u3092\u3044\u304f\u3064\u304b\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<br \/>\n<div><\/div><kinsta-auto-toc heading=\"Table of Contents\" exclude=\"last\" list-style=\"arrow\" selector=\"h2\" count-number=\"-1\"><\/kinsta-auto-toc><\/p>\n<h2>\u300cReact Hook useEffect has a missing dependency\u300d\u30a8\u30e9\u30fc\u306e\u539f\u56e0<\/h2>\n<p>\u300cReact Hook useEffect has a missing dependency\u300d\u30a8\u30e9\u30fc\u306f\u3001<code>useEffect<\/code>\u30d5\u30c3\u30af\u306e\u4f9d\u5b58\u914d\u5217\u304c\u4e0d\u5b8c\u5168\u3001\u307e\u305f\u306f\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u306b\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u4f9d\u5b58\u914d\u5217\u306f<code>useEffect<\/code>\u30d5\u30c3\u30af\u306e\u7b2c2\u5f15\u6570\u3067\u3001\u30a8\u30d5\u30a7\u30af\u30c8\u304c\u4f9d\u5b58\u3059\u308b\u5909\u6570\u3092\u6307\u5b9a\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u4f9d\u5b58\u95a2\u4fc2\u306e\u914d\u5217\u3067\u6307\u5b9a\u3055\u308c\u305f\u5909\u6570\u306e\u5024\u304c\u5909\u66f4\u3055\u308c\u308b\u3068\u3001\u30a8\u30d5\u30a7\u30af\u30c8\u304c\u518d\u3073\u5b9f\u884c\u3055\u308c\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/p>\n<p>\u30a8\u30d5\u30a7\u30af\u30c8\u304c\u4f9d\u5b58\u3059\u308b\u5909\u6570\u304c\u4f9d\u5b58\u914d\u5217\u306b\u542b\u307e\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u3001\u5024\u304c\u5909\u66f4\u3055\u308c\u3066\u3082\u30a8\u30d5\u30a7\u30af\u30c8\u304c\u518d\u5b9f\u884c\u3055\u308c\u306a\u3044\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u4e88\u671f\u3057\u306a\u3044\u52d5\u4f5c\u3084\u30d0\u30b0\u306b\u3064\u306a\u304c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u30a8\u30e9\u30fc\u306fReact\u306e\u30a8\u30e9\u30fc\u3067\u306f\u306a\u304f\u3001ESLint\u306e\u30a8\u30e9\u30fc\u3067\u3059\u3002<a href=\"https:\/\/www.npmjs.com\/package\/eslint-config-react-app\" target=\"_blank\" rel=\"noopener noreferrer\">ESLint<\/a>\u306b\u306fReact\u5c02\u7528\u306e\u30d7\u30e9\u30b0\u30a4\u30f3\u304c\u3042\u308a\u3001React\u30b3\u30fc\u30c9\u8a18\u8ff0\u3092\u652f\u63f4\u3059\u308b\u30eb\u30fc\u30eb\u304c\u642d\u8f09\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u30eb\u30fc\u30eb\u306e1\u3064\u306b\u3042\u308b<code>\"react-hooks\/exhaustive-deps\"<\/code>\u30eb\u30fc\u30eb\u304c\u3001\u300cReact Hook useEffect has a missing dependency\u300d\u30a8\u30e9\u30fc\u3092\u691c\u51fa\u3057\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3068\u3057\u3066\u3001\u30ab\u30a6\u30f3\u30c8\u306e\u72b6\u614b\u3092\u6301\u3064\u95a2\u6570\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u898b\u3066\u307f\u307e\u3059\u3002\u3053\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306f<code>count<\/code>\u306e\u5024\u304c\u5909\u66f4\u3055\u308c\u308b\u305f\u3073\u306b\u3001\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u51fa\u529b\u3057\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-jsx\">import { useState, useEffect } from 'react';\n\nconst App = () =&gt; {\n  const [count, setCount] = useState(0);\n\n  useEffect(() =&gt; {\n    console.log(`${count}\u56de\u30af\u30ea\u30c3\u30af\u3057\u307e\u3057\u305f`);\n  }, []);\n\n  return (\n    &lt;div&gt;\n      &lt;h1&gt;Hello World&lt;\/h1&gt;\n      &lt;p&gt;\u56de\u6570\uff1a{count}&lt;\/p&gt;\n      &lt;button onClick={() =&gt; setCount(count + 1)}&gt;1\u5897\u3084\u3059&lt;\/button&gt;\n    &lt;\/div&gt;\n  );\n};\n\nexport default App;<\/code><\/pre>\n<p>\u4e0a\u306e\u4f8b\u306b\u306f\u3001<code>useState<\/code>\u3001<code>useEffect<\/code>\u30d5\u30c3\u30af\u3092\u4f7f\u7528\u3059\u308b\u95a2\u6570\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002<code>useEffect<\/code>\u30d5\u30c3\u30af\u306f\u3001\u72b6\u614b\u5909\u6570<code>count<\/code>\u306e\u5024\u304c\u5909\u66f4\u3055\u308c\u308b\u305f\u3073\u306b\u3001\u305d\u306e\u5024\u3092\u542b\u3080\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u30ed\u30b0\u306b\u8a18\u9332\u3059\u308b\u306e\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u3057\u304b\u3057\u3001<code>useEffect<\/code>\u30d5\u30c3\u30af\u306e\u7b2c2\u5f15\u6570\u306e\u914d\u5217\uff08\u4f9d\u5b58\u914d\u5217\uff09\u306b\u3001<code>count<\/code>\u5909\u6570\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u305b\u3093\u3002\u3053\u308c\u304c\u3001\u300cReact Hook useEffect has a missing dependency\u300d\u30a8\u30e9\u30fc\u3092\u5f15\u304d\u8d77\u3053\u3057\u307e\u3059\u3002<\/p>\n<figure style=\"width: 1600px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinqsta.com\/wp-content\/uploads\/2023\/03\/useeffect-dependency-error.jpg\" alt=\"\u300cReact Hook useEffect has a missing dependency\u300d\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\" width=\"1600\" height=\"201\"><figcaption class=\"wp-caption-text\">\u300cReact Hook useEffect has a missing dependency\u300d\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8<\/figcaption><\/figure>\n<h2>\u300cReact Hook useEffect has a missing dependency\u300d\u30a8\u30e9\u30fc\u3092\u89e3\u6c7a\u3059\u308b\uff083\u3064\u306e\u65b9\u6cd5\uff09<\/h2>\n<p>\u3053\u306e\u30a8\u30e9\u30fc\u306e\u89e3\u6c7a\u65b9\u6cd5\u306f\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u3002\u305d\u308c\u305e\u308c\u8a73\u3057\u304f\u3054\u7d39\u4ecb\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u8db3\u308a\u306a\u3044\u4f9d\u5b58\u95a2\u4fc2\u3092\u8ffd\u52a0\u3059\u308b<\/li>\n<li>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3084\u95a2\u6570\u3092\u6271\u3046\u969b\u306b\u306f\u30e1\u30e2\u5316\u3055\u308c\u305f\u5024\u3092\u8fd4\u3059\u30d5\u30c3\u30af\u3092\u4f7f\u7528\u3059\u308b<\/li>\n<li>ESLint\u30eb\u30fc\u30eb\u3092\u7121\u52b9\u306b\u3059\u308b<\/li>\n<\/ul>\n<h3>1. useEffect\u4f9d\u5b58\u914d\u5217\u306b\u8db3\u308a\u306a\u3044\u4f9d\u5b58\u95a2\u4fc2\u3092\u8ffd\u52a0\u3059\u308b<\/h3>\n<p>\u3053\u306e\u30a8\u30e9\u30fc\u3092\u89e3\u6c7a\u3059\u308b\u624b\u3063\u53d6\u308a\u65e9\u3044\u65b9\u6cd5\u306f\u3001<code>useEffect<\/code>\u30d5\u30c3\u30af\u3067\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u3059\u3079\u3066\u306e\u4f9d\u5b58\u95a2\u4fc2\u3092\u4f9d\u5b58\u95a2\u4fc2\u306e\u914d\u5217\u306b\u8ffd\u52a0\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n<p>\u4f9d\u5b58\u95a2\u4fc2\u3092\u7279\u5b9a\u3059\u308b\u306b\u306f\u3001<code>useEffect<\/code>\u30d5\u30c3\u30af\u306e\u5185\u90e8\u3067\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u5909\u6570\u3084\u5024\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u5909\u6570\u3084\u5024\u304c\u6642\u9593\u306e\u7d4c\u904e\u3068\u3068\u3082\u306b\u5909\u5316\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u4f9d\u5b58\u95a2\u4fc2\u306e\u914d\u5217\u306b\u52a0\u3048\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u5148\u306b\u793a\u3057\u305f\u30b3\u30fc\u30c9\u3067\u306f\u3001<code>count<\/code>\u5909\u6570\u304c<code>useEffect<\/code>\u30d5\u30c3\u30af\u306e\u5185\u90e8\u3067\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u4f9d\u5b58\u914d\u5217\u306b\u306f\u542b\u307e\u308c\u3066\u3044\u307e\u305b\u3093\u3002\u305d\u306e\u305f\u3081\u3001<code>count<\/code>\u5909\u6570\u304c\u5909\u66f4\u3055\u308c\u305f\u5834\u5408\u3001<code>useEffect<\/code>\u30d5\u30c3\u30af\u304c\u518d\u3073\u5b9f\u884c\u3055\u308c\u305a\u3001\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u53e4\u3044\u72b6\u614b\u306e\u30c7\u30fc\u30bf\u3084\u305d\u306e\u4ed6\u306e\u554f\u984c\u3092\u62b1\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u30a8\u30e9\u30fc\u3092\u89e3\u6c7a\u3059\u308b\u306b\u306f\u3001<code>count<\/code>\u5909\u6570\u3092\u4f9d\u5b58\u914d\u5217\u306b\u8ffd\u52a0\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<pre><code class=\"language-jsx\">import { useState, useEffect } from 'react';\n\nconst App = () =&gt; {\n  const [count, setCount] = useState(0);\n\n  useEffect(() =&gt; {\n    console.log(`${count}\u56de\u30af\u30ea\u30c3\u30af\u3057\u307e\u3057\u305f`);\n  }, [count]);\n\n  return (\n    &lt;div&gt;\n      &lt;h1&gt;Hello World&lt;\/h1&gt;\n      &lt;p&gt;\u56de\u6570\uff1a{count}&lt;\/p&gt;\n      &lt;button onClick={() =&gt; setCount(count + 1)}&gt;1\u5897\u3084\u3059&lt;\/button&gt;\n    &lt;\/div&gt;\n  );\n};\n\nexport default App;<\/code><\/pre>\n<p>\u4f9d\u5b58\u914d\u5217\u306b<code>count<\/code>\u5909\u6570\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u3067\u3001\u3053\u306e\u5024\u304c\u5909\u66f4\u3055\u308c\u308b\u305f\u3073\u306b\u3001<code>useEffect<\/code>\u30d5\u30c3\u30af\u3092\u518d\u5b9f\u884c\u3059\u308b\u3088\u3046React\u306b\u6307\u793a\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u306b\u3088\u308a\u3001\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u5e38\u306b\u6700\u65b0\u306e\u30c7\u30fc\u30bf\u3092\u6301\u3064\u3088\u3046\u306b\u306a\u308a\u3001\u300cReact Hook useEffect has a missing dependency\u300d\u30a8\u30e9\u30fc\u3092\u56de\u907f\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u4f9d\u5b58\u95a2\u4fc2\u304c\u8907\u6570\u3042\u308b\u5834\u5408\u306f\u3001\u30ab\u30f3\u30de\u3067\u533a\u5207\u3063\u3066\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-jsx\">import { useState, useEffect } from 'react';\nconst App = () =&gt; {\n  const [firstName, setFirstName] = useState('');\n  const [lastName, setLastName] = useState('');\n  const [fullName, setFullName] = useState('');\n\n  useEffect(() =&gt; {\n    setFullName(`${firstName} ${lastName}`);\n  }, [firstName, lastName]);\n\n  const handleFirstNameChange = (event) =&gt; {\n    setFirstName(event.target.value);\n  };\n\n  const handleLastNameChange = (event) =&gt; {\n    setLastName(event.target.value);\n  };\n\n  return (\n    &lt;div&gt;\n      &lt;label&gt;\n        \u540d\uff1a\n        &lt;input type=\"text\" value={firstName} onChange={handleFirstNameChange} \/&gt;\n      &lt;\/label&gt;\n      &lt;label&gt;\n        \u59d3\uff1a\n        &lt;input type=\"text\" value={lastName} onChange={handleLastNameChange} \/&gt;\n      &lt;\/label&gt;\n      &lt;p&gt;\u30d5\u30eb\u30cd\u30fc\u30e0\uff1a{fullName}&lt;\/p&gt;\n    &lt;\/div&gt;\n  );\n};\n\nexport default App;<\/code><\/pre>\n<h3>2. \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u95a2\u6570\u306e\u51e6\u7406<\/h3>\n<p>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3084\u914d\u5217\u3092\u6271\u3046\u5834\u5408\u3001\u4f9d\u5b58\u914d\u5217\u306b\u8ffd\u52a0\u3059\u308b\u3060\u3051\u3067\u306f\u4e0d\u5341\u5206\u3067\u3001\u4e0d\u8981\u306a\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3092\u907f\u3051\u308b\u305f\u3081\u30e1\u30e2\u5316\u3059\u308b\u304b\u3001<code>useEffect<\/code>\u30d5\u30c3\u30af\u306b\u79fb\u52d5\u3059\u308b\u304b\u3001\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u5916\u306b\u79fb\u52d5\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n<p><a href=\"https:\/\/kinqsta.com\/javascript\/\">JavaScript<\/a>\u3067\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3084\u914d\u5217\u306f\u53c2\u7167\u306b\u3088\u3063\u3066\u6bd4\u8f03\u3055\u308c\u3001\u6bce\u56de\u30e1\u30e2\u30ea\u4e0a\u306e\u7570\u306a\u308b\u5834\u6240\u3092\u6307\u3059\u305f\u3081\u3001\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3054\u3068\u306b\u5024\u304c\u5909\u308f\u308a\u3001\u7121\u9650\u306e\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u30eb\u30fc\u30d7\u304c\u767a\u751f\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u30a8\u30e9\u30fc\u3092\u5f15\u304d\u8d77\u3053\u3059\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre><code class=\"language-jsx\">import { useState, useEffect } from 'react';\n\nconst App = () =&gt; {\n  const [user, setUser] = useState({});\n\n  \/\/ \ud83d\udc47\ufe0f\u3000\u3053\u308c\u304c\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3054\u3068\u306b\u5909\u5316\n  let newUser = { name: 'Jane', age: 28 };\n\n  useEffect(() =&gt; {\n    setUser(newUser);\n  }, [newUser]);\n\n  return (\n    &lt;div&gt;\n      &lt;h1&gt;Hello World&lt;\/h1&gt;\n    &lt;\/div&gt;\n  );\n};\n\nexport default App;<\/code><\/pre>\n<p>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092<code>useEffect<\/code>\u30d5\u30c3\u30af\u306b\u79fb\u52d5\u3059\u308b\u304b\u3001\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u5916\u306b\u79fb\u52d5\u3059\u308b\u3053\u3068\u3067\u89e3\u6c7a\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<pre><code class=\"language-jsx\">import { useState, useEffect } from 'react';\n\nconst App = () =&gt; {\n  const [user, setUser] = useState({});\n\n  useEffect(() =&gt; {\n    let newUser = { name: 'Jane', age: 28 };\n    setUser(newUser);\n  }, []);\n\n  return (\n    &lt;div&gt;\n      &lt;h1&gt;Hello World&lt;\/h1&gt;\n    &lt;\/div&gt;\n  );\n};\n\nexport default App;<\/code><\/pre>\n<p>\u3088\u308a\u826f\u3044\u89e3\u6c7a\u7b56\u3068\u3057\u3066\u3001<code>useMemo<\/code>\u306e\u3088\u3046\u306a\u30e1\u30e2\u5316\u3055\u308c\u305f\u5024\u3092\u8fd4\u3059\u30d5\u30c3\u30af\u3092\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u4f7f\u7528\u3057\u3001<code>useCallback<\/code>\u3092\u95a2\u6570\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3084\u95a2\u6570\u3092\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u5185\u3084\u4f9d\u5b58\u914d\u5217\u5185\u306b\u4fdd\u6301\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p><strong>\u88dc\u8db3<\/strong>\uff09\u30e1\u30e2\u5316\u306e\u30d5\u30c3\u30af\u3068\u306f\u3001\u9ad8\u4fa1\u306a\u8a08\u7b97\u7d50\u679c\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3057\u3001\u4e0d\u5fc5\u8981\u306a\u518d\u8a08\u7b97\u3092\u907f\u3051\u308b\u306e\u306b\u4fbf\u5229\u306a\u30d5\u30c3\u30af\u3067\u3059\u3002<\/p>\n<p><code>useMemo<\/code>\u30d5\u30c3\u30af\u3092\u4f7f\u3063\u3066\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30e1\u30e2\u5316\u3059\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-jsx\">import { useState, useEffect, useMemo } from 'react';\n\nconst App = () =&gt; {\n  const [user, setUser] = useState({});\n\n  const newUser = useMemo(() =&gt; {\n    return { name: 'John', age: 30 };\n  }, []);\n\n  useEffect(() =&gt; {\n    setUser(newUser);\n  }, [newUser]);\n\n  return (\n    &lt;div&gt;\n      &lt;h1&gt;Hello World&lt;\/h1&gt;\n    &lt;\/div&gt;\n  );\n};\n\nexport default App;<\/code><\/pre>\n<p>\u540c\u3058\u3088\u3046\u306b\u3001\u95a2\u6570\u3092\u6271\u3046\u969b\u306b\u306f\u3001<code>useCallback<\/code>\u30d5\u30c3\u30af\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>3. ESLint\u306e\u30eb\u30fc\u30eb\u3092\u7121\u52b9\u306b\u3059\u308b<\/h3>\n<p>\u5148\u306b\u3082\u89e6\u308c\u305f\u3068\u304a\u308a\u3001\u300cReact Hook useEffect has a missing dependency\u300d\u30a8\u30e9\u30fc\u306fESLint\u306e\u8b66\u544a\u30a8\u30e9\u30fc\u3067\u3059\u3002\u3053\u306e\u65b9\u6cd5\u306f\u3059\u3079\u3066\u306e\u72b6\u6cc1\u3067\u63a8\u5968\u3055\u308c\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u4f9d\u5b58\u95a2\u4fc2\u306e\u6b20\u843d\u304c\u554f\u984c\u3067\u306f\u306a\u3044\u3053\u3068\u304c\u660e\u3089\u304b\u3067\u3042\u308b\u5834\u5408\u306f\u3001\u3053\u306e\u65b9\u6cd5\u304c\u6709\u52b9\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u4f9d\u5b58\u95a2\u4fc2\u914d\u5217\u306e\u884c\u306e\u524d\u306b\u3001\u4ee5\u4e0b\u306e\u30b3\u30e1\u30f3\u30c8\u3092\u8ffd\u52a0\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<pre><code class=\"language-jsx\">\/\/ eslint-disable-next-line react-hooks\/exhaustive-deps<\/code><\/pre>\n<p>\u4f8b\u3092\u898b\u3066\u307f\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-jsx\">useEffect(() =&gt; {\n  console.log(`You clicked ${count} times`);\n  \n\/\/ eslint-disable-next-line react-hooks\/exhaustive-deps\n}, []);<\/code><\/pre>\n<p>\u306a\u304a\u3001ESLint\u30eb\u30fc\u30eb\u3092\u7121\u52b9\u3059\u308b\u3068\u3001\u4e0d\u6ce8\u610f\u3067\u5225\u306e\u554f\u984c\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308b\u305f\u3081\u3054\u6ce8\u610f\u304f\u3060\u3055\u3044\u3002\u30eb\u30fc\u30eb\u3092\u7121\u52b9\u306b\u3059\u308b\u524d\u306b\u3053\u306e\u70b9\u3092\u8003\u616e\u3057\u3001\u53ef\u80fd\u3067\u3042\u308c\u3070\u4ed62\u3064\u306e\u89e3\u6c7a\u7b56\u3092\u5b9f\u884c\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u300cReact Hook useEffect has a missing 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&#8230;<\/p>\n","protected":false},"author":287,"featured_media":55870,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kinsta_gated_content":false,"_kinsta_gated_content_redirect":"","footnotes":""},"tags":[],"topic":[802,803],"class_list":["post-55869","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","topic-react","topic-react-errors"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.6 (Yoast SEO v24.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u300cReact Hook useEffect has a missing dependency\u300d\u30a8\u30e9\u30fc\u306e\u89e3\u6c7a\u65b9\u6cd5\uff5c Kinsta\u00ae<\/title>\n<meta name=\"description\" content=\"\u958b\u767a\u8005\u304c\u3088\u304f\u906d\u9047\u3059\u308b\u3001\u300cReact Hook useEffect has missing 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