lib/GoogleLogin.js

GoogleLogin.js

export const loadGoogleScript = () => {
  
      //loads the Google JavaScript Library
      (function () {
          const id = 'google-js';
          const src = 'https://apis.google.com/js/platform.js';
          
          //we have at least one script (React)
          const firstJs = document.getElementsByTagName('script')[0];
          
          //prevent script from loading twice
          if (document.getElementById(id)) { return; }
          const js = document.createElement('script'); 
          js.id = id;
          js.src = src;
          js.onload = window.onGoogleScriptLoad; 
          firstJs.parentNode.insertBefore(js, firstJs);
      }());    
      
}