Testing Deployment of Apps Script

I make an app by MIT ai2 to access a script using doPost(). I copy the deployment link to MIT app inventor firstly. But after I change the script, I find the new change can't take effect unless I make a new deployment, and need to copy the new link to MIT APP again. It is very trouble in testing. Can I make script change taking effect immediately without re-deploy the script and copy the new link to the MIT app?

If you wish for speedier gratification, you can get the dev url and any saved changes in your script will be immediately enabled in your web app call, without the need for deployment:

Get the dev url:

// This function is used for retrieving the Web Apps Dev URL.
function getUrl() {
  console.log(ScriptApp.getService().getUrl());
}