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Diferans ant `let`, `const` ak `var` an JavaScript

asked a month ago190 viewsht

5

Mwen wè kòd ak var, let ak const. Ki lè pou m sèvi ak chak youn? Èske gen yon rezon pou toujou evite var?

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javascript
asked a month ago

2 Answers

6
✓
✓ Accepted answer

Your CMD npm start runs in a shell that exits. Also you're missing EXPOSE and a proper working directory. Try:

WORKDIR /app
COPY package*.json ./
RUN npm ci
COPY . .
CMD ["node", "server.js"]

Exec form (["node", ...]) keeps the process as PID 1.

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answered a month ago
5

Rule of thumb: const by default, let when you must reassign, never var. var is function-scoped and hoisted, which causes subtle bugs. const doesn't make objects immutable — only the binding.

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answered a month ago

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