readthedocs.js

if (document.querySelector("meta[name='readthedocs-addons-api-version']") === null) {
  // Add a META tag to specify the API version we are expecting
  const meta = document.createElement("meta");
  meta.name = "readthedocs-addons-api-version";
  meta.content = "1";
  document.head.append(meta);
}

// Show a message in the console immediatelly loading this script
console.log("This message comes from a file injected by CustomScript addon.");

function _handleReadTheDocsData (data) {
  console.log("_handleReadTheDocsData function called.");
  console.log("Project slug:", data.projects.current.slug);
}

// The event "readthedocs-addons-data-ready" has been already fired when this script is run.
// We need to check for `window.ReadTheDocsEventData` first, and if it's available
// use that data to call the handler.
if (window.ReadTheDocsEventData !== undefined) {
  _handleReadTheDocsData(window.ReadTheDocsEventData.data());
}

// After that, we subscribe to the Read the Docs Addons event to access data
// on future dispatchs (e.g. when a URL changes on a SPA)
document.addEventListener("readthedocs-addons-data-ready", function (event) {
  _handleReadTheDocsData(event.detail.data());
});