To call the Express res.sendFile method with an absolute path, we can call the sendFile method with the root option set to the __dirname .
__dirname has the path string of the current working directory as its value.
For instance, we can write:
const express = require('express')
const app = express()
const port = 3000
app.get('/', (req, res) => {
res.sendFile('public/index.html' , { root : __dirname});
});
app.listen(port, () => {
console.log(`Example app listening at http://localhost:${port}`)
})
We call res.sendFile with the file path as the first argument.
It’s the path relative to the folder path set as the value of root .
root is set to __dirname , so the path in the first argument is relative to __dirname .
