[Solved] How can you serve static files with caching headers set to 1 day in Express? — Ans: app.use(express.static('public', { maxAge: 86400000 })); | Node.js

Node.js - HTTP Module

How can you serve static files with caching headers set to 1 day in Express?

Aapp.use(express.static('public', { maxAge: '1d' }));

Bapp.use(express.static('public', { maxAge: 86400000 }));

Capp.use(express.static('public', { cache: '1 day' }));

Dapp.use(express.static('public', { cacheControl: true, maxAge: 86400 }));

Step-by-Step Solution

Solution:

Step 1: Understand maxAge option for caching
The maxAge option expects milliseconds to set cache duration.
Step 2: Convert 1 day to milliseconds
1 day = 24 * 60 * 60 * 1000 = 86400000 milliseconds.
Step 3: Check option syntax
app.use(express.static('public', { maxAge: 86400000 })); correctly uses { maxAge: 86400000 } without extra invalid keys.
Final Answer:
app.use(express.static('public', { maxAge: 86400000 })); -> Option B
Quick Check:
maxAge in ms sets cache duration [OK]

Quick Trick: Use maxAge in milliseconds to set cache duration [OK]

Common Mistakes:

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How can you serve static files with caching headers set to 1 day in Express?