How to use a polyfill for node.js Buffer?

Hello,

I working on an app handling GIS shape files. To support shape files, I am using a package called [shpjs](https://github.com/calvinmetcalf/shapefile-js) which in turn uses [jszip](https://stuk.github.io/jszip/). Both of them depend on nodejs Buffer.

I am trying to use the[ `node-stdlib-browser` package](https://github.com/niksy/node-stdlib-browser#esbuild) to polyfill `Buffer` but have not been successful.

Please see my tsup config below:

```typescript
import { defineConfig } from "tsup";
//@ts-ignore
import nodeStdLibBrowswerPlugin from "node-stdlib-browser/helpers/esbuild/plugin";
import { default as stdLibBrowser } from "node-stdlib-browser";

import { createRequire } from "node:module";
const require = createRequire(import.meta.url);

export default defineConfig({
platform: "browser",
esbuildOptions: (options, context) => {
options.inject = [require.resolve("node-stdlib-browser/helpers/esbuild/shim")];
options.define = {
global: "global",
process: "process",
Buffer: "Buffer",
};
},
esbuildPlugins: [nodeStdLibBrowswerPlugin(stdLibBrowser)],
inject: [require.resolve("node-stdlib-browser/helpers/esbuild/shim")],
define: {
global: "global",
process: "process",
Buffer: "Buffer",
},
});

```

But still I get an error in JSZip.

Am I setting up polyfill correctly?

Start by reproducing the reported JSZip error with the tsup configuration shown in the issue. Inspect the generated browser bundle and the node-stdlib-browser esbuild plugin and shim setup to determine whether Buffer is being replaced. Done means the GIS shape-file app bundles and runs in the browser without the JSZip Buffer error.

Written by the indexing model from the issue text.