Javascript

Hi, I'm getting this error message in my console: react-dom.development.js:86 Warning: ReactDOM.render is no longer supported in React 18. Use createRoot instead. Until you switch to the new API, your app will behave as if it's running React ...

Hi, How can I remove the ending slash from a URL using Javascript?

Hi, I don't really understand the use of the return statement. Can anyone tell me what and how is it used for?

Hi, How can I add a character before each word in a string using Javascript?

Hi, I'd like to generate a downloadable text file with Javascript. I have a textarea and  button. If I click the button a txt file would be generated with the content of the textarea. How can I do that?

Hi, Is there a way to add more than one class with the classlist.add method? This one doesn't work for me: btn.classList.add('btn btn-lg');

Hi, Can anyone tell me what the difference is between the for and forEach loops in javascript? Thanks

How can I get the last character of a string dynamicaly using Javascript?

What is a closure in Javascript?

Hi, Can someone explain to me what the difference is between undefined and null? Thanks