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A very old HTML best practice suggests that we should not use tables to structure the HTML elements inside a webpage. This solution was used extensively a decade ago, and for this reason tables got a very bad reputation in the web community. However, using tables in your HTML code for structuring and presenting a set of data is still a valid option.

When you use a table with multiple columns, you often want to define the width for each of the columns of the table.

• One reason for that could be that you want to show more context of an “important” column than the others.
• Another reason could be the fact that if you do not define the column widths, the longest value in a column will also define the width of the column. As a result the other columns are getting shrank.

When you test your JavaScript code you often want to test the user interactions with the UI of your web application and not just its logic. Testing the UI makes even more sense if you use a JS-framework which offers a list of UI controls.

Consider the following use-cases that could be unit tested:

• The user loads a new webpage and the cursor has to be placed automatically inside the search input field.

• The search input, together with other input elements, is placed inside a div with a red background.

You want to achieve the following tasks with JavaScript:

• Extract the words out of a string

• Reverse the order of the extracted words.

Let’s see how you can split a string based on its words. There are two simple options.

The previous days I had a great conversation about the fundamentals of JavaScript, scope, closure, etc.. The this keyword was also a discussion point. I wasn’t 100% sure of the rules that apply to this and I wanted to refresh my memory about the possible ways to use the keyword and for each case identify the owner of this when a function is invoked.

Based on my current experience with the React Native framework, I would like to share with you some hints and tips that will improve your skills in the way you develop with the framework.

Isolate the business logic of your application from the UI/ components code

This is probably the most valuable information someone should have in her mind when developing with React Native. React Native tries to be as platform independent as possible, however, there will be cases, that you will have to write different JavaScript code for iOS and different code for Android.