質問編集履歴
2
誤字修正
test
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File without changes
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test
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@@ -320,7 +320,7 @@
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320
320
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321
321
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-
・localhostの表示
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323
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+
・http://localhost:3000の表示
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324
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325
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```
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326
326
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1
追記：{count}の括弧{}を外した場合
test
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File without changes
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test
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@@ -267,3 +267,81 @@
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}
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```
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270
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+
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### 追記：{count}の括弧{}を外した場合
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274
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275
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276
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277
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◆修正後のコード
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278
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+
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279
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+
```
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280
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+
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281
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+
useEffect(() => {
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282
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283
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const interval = setInterval(() => {
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284
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285
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setCount(c => c + 1);
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286
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+
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287
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+
squares[items[count].position] = items[count].value;
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288
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289
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}, 1000);
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290
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+
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291
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return () => clearInterval(interval);
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292
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293
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+
}, []);
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294
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295
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```
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296
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297
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298
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299
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◆エラー内容
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300
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+
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301
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+
・コンソール
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302
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+
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303
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```
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304
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+
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305
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+
Compiled with warnings.
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306
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+
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307
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308
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309
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+
src/components/Borad.tsx
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310
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+
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311
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Line 30:6: React Hook useEffect has missing dependencies: 'count', 'items', and 'squares'. Either include them or remove the dependency array react-hooks/exhaustive-deps
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312
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+
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313
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+
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314
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+
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315
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+
Search for the keywords to learn more about each warning.
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316
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+
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317
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+
To ignore, add // eslint-disable-next-line to the line before.
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318
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319
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```
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320
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+
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321
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+
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322
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+
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323
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+
・localhostの表示
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324
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+
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325
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+
```
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326
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+
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327
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+
TypeError: Cannot read property 'position' of undefined
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328
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+
|
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329
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+
(anonymous function)
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330
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+
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331
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+
src/components/Borad.tsx:27
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332
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+
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333
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+
24 | useEffect(() => {
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334
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+
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335
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+
25 | const interval = setInterval(() => {
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336
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+
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337
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+
26 | setCount(c => c + 1);
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338
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+
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339
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+
> 27 | squares[items[count].position] = items[count].value;
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340
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+
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341
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+
| ^ 28 | }, 1000);
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342
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+
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+
29 | return () => clearInterval(interval);
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344
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+
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345
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+
30 | }, []);
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346
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+
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347
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+
```
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