Can require() statement in commonjs be dynamic?

July 16, 2023

Is require() statement in commonjs module system static or dymanic?
Can require() be dynamic? Can anyone give examples for this?

is following code dynamic or static:

let c1="./c"
let c2=".js";
const f=require(c1+c2);

console.log(f);

I mean will c1+c2 resolved at compile time or run time?
I am totally confused with AI answers. Some time it is saying require() is dynamic sometimes it is saying it is static. Still Stackoverflow is best resource.

>Solution :

It’s dynamic, but a module is executed only once like in ESM. It’s like a sync version of ESM’s import():

let count = 10;
while (count--) {

    const random = ['fs', 'fs2'][Math.floor(Math.random() * 1.9999)];
    console.log('require', random);

    try {
        const fs = require(random);
    } catch (e) {
        console.log(e.message);
    }
}

Each time this throws an error randomly:

require fs2
Cannot find module 'fs2'
Require stack:
 - /bytex/change-color/test.js
require fs
require fs
require fs2
Cannot find module 'fs2'
Require stack:
 - /bytex/change-color/test.js
require fs2
Cannot find module 'fs2'
Require stack:
 - /bytex/change-color/test.js
require fs2
Cannot find module 'fs2'
Require stack:
 - /bytex/change-color/test.js
require fs2
Cannot find module 'fs2'
Require stack:
 - /bytex/change-color/test.js
require fs
require fs2
Cannot find module 'fs2'
Require stack:
 - /bytex/change-color/test.js
require fs2
Cannot find module 'fs2'
Require stack:
 - /bytex/change-color/test.js