meteor/packages/non-core/bundle-visualizer/client.js

import { Meteor } from "meteor/meteor";
import {
  classPrefix,
  methodNameStats,
  packageName,
} from "./common.js";
import * as classes from "./classNames.js";

import("./style.css");

Meteor.startup(() => {
  import("./sunburst.js").then(s => main(s.Sunburst));
});

async function main(builder) {
  const { container, mask } = frameStage();

  document.body.appendChild(mask);
  document.body.appendChild(container);

  // Always match the protocol (http or https) and the domain:port of the
  // current page.
  const url = [
    "//" +
    location.host +
    methodNameStats +
    "?cacheBuster=" +
    Math.random().toString(36).slice(2)
  ].join();

  try {
    const data = await fetch(url, { method: "GET" });
    new builder({ container }).loadJson(await data.json())
  } catch (err) {
    console.error([
      packageName + ": Couldn't load stats for visualization.",
      "Are you using standard-minifier-js >= 2.1.0 as the minifier?",
    ].join(" "))
  }
}

function frameStage() {
  // Create the mask which will block out the main application.
  const mask = document.createElement("div");
  mask.setAttribute("class", `${classPrefix} ${classes.mask}`);

  // Create the container which the SVG elements will be drawn into.
  const container = document.createElement("div");
  container.setAttribute("class", `${classPrefix} ${classes.rootContainer}`);
  return { container, mask };
}