Function inject

packages/react-devtools-shell/src/e2e/devtools.js:27–33

(contentDocument, sourcePath, callback)

}

function inject(contentDocument, sourcePath, callback) {
  const script = contentDocument.createElement(class="st">'script');
  script.onload = callback;
  script.src = sourcePath;

  ((contentDocument.body: any): HTMLBodyElement).appendChild(script);
}

function init(appIframe, devtoolsContainer, appSource) {
  const {contentDocument, contentWindow} = appIframe;