mine/node_modules/webpack-dev-server/client/utils/getCurrentScriptSource.js

/**
 * @returns {string}
 */
function getCurrentScriptSource() {
  // `document.currentScript` is the most accurate way to find the current script,
  // but is not supported in all browsers.
  if (document.currentScript) {
    return document.currentScript.getAttribute("src");
  }

  // Fallback to getting all scripts running in the document.
  var scriptElements = document.scripts || [];
  var scriptElementsWithSrc = Array.prototype.filter.call(scriptElements, function (element) {
    return element.getAttribute("src");
  });
  if (scriptElementsWithSrc.length > 0) {
    var currentScript = scriptElementsWithSrc[scriptElementsWithSrc.length - 1];
    return currentScript.getAttribute("src");
  }

  // Fail as there was no script to use.
  throw new Error("[webpack-dev-server] Failed to get current script source.");
}
export default getCurrentScriptSource;