Sometimes, we want to await for a callback to return with JavaScript. In this article,…

Sometimes, we want to check if a specific pixel of an image is transparent with…

Sometimes, we want to mock one specific method of a class with Jest and JavaScript.…

Sometimes, we want to find element’s position relative to the document with JavaScript. In this…

Sometimes, we want to truncate an array with JavaScript. In this article, we’ll look at…

Sometimes, we want to reject promise and catch the error if status is not OK…

Sometimes, we want to fix string.split is not a function with JavaScript. In this article,…

Sometimes, we want to refresh an iframe using JavaScript. In this article, we’ll look at…

Sometimes, we want to fix cannot update a component while rendering a different component warning…

Sometimes, we want to fix Phantom.js not waiting for full page load with JavaScript. In…