What is the mean of "bodyParser.urlencoded({ extended: true }))" and "bodyParser.json()" in NodeJS? : <pre><code>const bp = require("body-parser");
const express = require("express");
const app = express();

app.use(bp.json());
app.use(bp.urlencoded({ extended: true }));
</code></pre>

<p>I need to know what they do. I couldn't find any detailed information. Can you help me? And what is different between <code>extended:true</code> and <code>extended:false</code></p>
