gatsby-node.js

const webpack = require("webpack");

exports.onCreateWebpackConfig = ({ stage, actions }) => {
    actions.setWebpackConfig({
        resolve: {
            fallback: {
                assert: require.resolve("assert/"),
                http: require.resolve("stream-http"),
                os: require.resolve("os-browserify/browser"),
                https: require.resolve("https-browserify"),
                stream: require.resolve("stream-browserify"),
                buffer: require.resolve("buffer"),
                path: require.resolve("path-browserify"),
                crypto: require.resolve("crypto-browserify"),
                tls: require.resolve("tls-browserify"),
                net: require.resolve("net-browserify"),
                zlib: require.resolve("zlib-browserify"),
                fs: require.resolve("browserify-fs"),
                https: require.resolve("https-browserify"),
            },
        },
        plugins: [
            new webpack.ProvidePlugin({
                process: "process/browser",
                Buffer: ["buffer", "Buffer"],
            }),
        ],
    });
};