When working with strings you may want to trim off characters from the start of the value. For example, when composing a request URL you may combine a base URL with an endpoint URL. You want to make sure you’re not ending the base URL with a trailing and …

Developing applications usually comes with date and timestamp manipulations. You may let users interact with dates or times, like setting a task to be „due in 15 minutes“ or „remind me of X in 30 minutes“. JavaScript comes with a native Date type allowing you to manipulate dates. This tutorial …

Working with dates is a common task in application development. You may provide ways to adjust dates and timestamps in your app. One of these tasks may be adding hours to a date in JavaScript. For example, you may allow users to tell your app to „remind me in 1 …

Sometimes you want to show a visual hint to users when a due date comes up. Like, “please notice that your task is due tomorrow”. From a developers perspective you need to compare the task’s due date against the date of tomorrow. This tutorial shows you how to detect …

Modern applications show lots of useful information right in the user interface. For example, you as a user want to see if something is due today and be notified about the event. As a developer you need to make sure you’re showing the right items for today. That’s …

Sometimes you want to check if a given date represents “yesterday”, the previous day of today. For example, this use-case appears in UI elements where you’re showing relative dates like “yesterday” instead of the YYYY-MM-DD format. This tutorial shows you how to detect whether a given date is yesterday! …

Formatting dates is a common task in application. Displaying due dates or birthdays is always connected to dates. A typical formatting for readable dates is the YYYY-MM-DD format. This tutorial shows you how to format a JavaScript date in the YYYY-MM-DD format. {{outline}} Formatting JavaScript Dates in YYYY-MM-DD Formatting dates …

Large numbers are hard to read. For example, what about “2014010167“? Is it 20 million, 200 million, or 2 billion? Yeah, we can’t read that number either and need to concentrate. What about “2014010_167”? Much better! JavaScript shipped a new feature called “numeric separator” to improve readability on …