How to list files in folder from a ejs file

[wise-coders]

I would like to add all images to a template, by listing the files from a folder.
How is this possible`

I tried

<%
const fs = require('fs');

fs.readdir('img', (err, files) => {
  files.forEach(file => {
    console.log(file);
  });
});

But I receive:

Unhandled rejection ReferenceError: c:\work\wise-coders-github\websites\vxvdata-website\themes\wisecoders\layout\layout-tools.ejs:18
    16|
    17|
 >> 18| <%
    19| const fs = require('fs');
    20|
    21| fs.readdir('img', (err, files) => {

require is not defined
    at eval (c:\work\wise-coders-github\websites\vxvdata-website\themes\wisecoders\layout\layout-tools.ejs:26:12)
    at layout-tools (c:\work\wise-coders-github\websites\vxvdata-website\node_modules\ejs\lib\ejs.js:682:17)
    at viewFn._compiled (c:\work\wise-coders-github\websites\vxvdata-website\node_modules\hexo\lib\theme\view.js:136:48)
    at viewFn.View.render (c:\work\wise-coders-github\websites\vxvdata-website\node_modules\hexo\lib\theme\view.js:41:15)
    at c:\work\wise-coders-github\websites\vxvdata-website\node_modules\hexo\lib\hexo\index.js:61:21
    at tryCatcher (c:\work\wise-coders-github\websites\vxvdata-website\node_modules\bluebird\js\release\util.js:16:23)
    at c:\work\wise-coders-github\websites\vxvdata-website\node_modules\bluebird\js\release\method.js:15:34
    at RouteStream._read (c:\work\wise-coders-github\websites\vxvdata-website\node_modules\hexo\lib\hexo\router.js:126:3)
    at RouteStream.Readable.read (node:internal/streams/readable:487:10)
    at resume_ (node:internal/streams/readable:987:12)
    at processTicksAndRejections (node:internal/process/task_queues:83:21)

[SukkaW]

Currently, all ejs files are executed in their own VM and context, and ejs can not have access to any Node.js built-in globals at all.

You can, however, create a custom hexo helper plugin to inject variables. Here is an example:

https://github.com/SukkaW/hexo-theme-suka/blob/1d457ac9fbad421d2e6b9853ae1cb3dfc5cadf05/scripts/index.js#L17
https://github.com/SukkaW/hexo-theme-suka/blob/master/includes/helpers/qrcode.js
https://github.com/SukkaW/hexo-theme-suka/blob/1d457ac9fbad421d2e6b9853ae1cb3dfc5cadf05/layout/_partial/menu/index-share.ejs#L57