patch.js

const fs = require("fs");
const f = "node_modules/@angular-devkit/build-angular/src/angular-cli-files/models/webpack-configs/browser.js";

fs.readFile(f, "utf8", function (err,data) {
  if (err) {
    return;
  }
  var result = data.replace(/node: false/g, "node: {crypto: true, stream: true, fs: \'empty\'}");

  fs.writeFile(f, result, "utf8", function (err) {
    if (err){ 
      return;
    }
  });
});



const f2 = "node_modules/@comunica/actor-init-sparql/lib/ActorInitSparql-browser.js";

fs.readFile(f2, "utf8", function (err,data) {
  if (err) {
    return;
  }
  var result = data.replace(/operation = (await this.mediatorOptimizeQueryOperation.mediate({ context, operation })).operation;/g, "//operation = (await this.mediatorOptimizeQueryOperation.mediate({ context, operation })).operation;");

  fs.writeFile(f2, result, "utf8", function (err) {
    if (err){
      return;
    }
  });
});