# Bundler Polyfill issues - Vite
> Bundler Polyfill Issues - Vite | Embedded Wallets
While setting up a new Web3 project from scratch, you might face bundler issues. This can occur because the
core packages like `eccrypto` have dependencies which are not present within the build environment.
To rectify this, the go-to method is to add the missing modules directly into the package, and edit the bundler
configuration to use those. Although this approach works, it can significantly increase bundle size, leading
to slower load times and a degraded user experience.
Some libraries rely on environment-specific modules that may be available at runtime in the browser even if
they are not bundled. Libraries such as Embedded Wallets' Web3Auth take advantage of this behavior and can
function correctly without bundling all modules. However, if you are using a library that does not take
advantage of this, you might face issues.
To avoid unnecessary overhead, include only the required polyfills, test functionality, and
configure your bundler to ignore unresolved modules rather than including them in the final build.
:::tip
We recommend that you require certain Node polyfills to be added to your project, while testing each of
its functionalities. At the same time, instruct the bundler to ignore the missing modules, and not include
them in the build.
:::
In this guide, we provide instructions for adding polyfills in Vite.
## Step 1: Install the missing modules
Check for the missing libraries in your build and included packages, and accordingly polyfill them. For Web3Auth, you just need to polyfill the `buffer` and `process` libraries.
```bash npm2yarn
npm install --save-dev buffer process
```
## Step 2: Add the polyfills to your project
Update the `index.html` file to include the polyfills. As shown in the code snippet below we added the `