Javascript

The recommended way to remove http or https from an URL in Javascript is to use the built-in URL object and access the various parts of the URL that way. Alternatively, you can use the String.replace() function with a regular expression and replace it with an empty string. Use the built-in URL object (recommended) The … Read more

This error means you are trying to access a property of a variable that is undefined. To fix this, you should make sure the variable is defined and has that property before you try to access it. You can accomplish this with the question mark operator or an if statement. Problem: you are trying to … Read more

There’s a couple different ways to round to two decimal places in Javascript. Which one you use will depend on your situation. Use Math.round The best way to do this is using Math.round, especially if you still need a number on the other end to do math on. Here is the most accurate and correct … Read more

A very common task in Javascript (and lots of other programming languages) is creating a subset of an array. Luckily, there’s lots of ways available to do this in Javascript. We’ll go over each from best (Array.filter) to worst (for loop). Use the Array.filter method Filtering an array of objects in Javascript can be done … Read more