The latest articles on DEV Community by Luís Cardoso (@lfacpt). https://dev.to/lfacpt https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F165362%2F779b6ee4-9488-449b-8a57-ec4fdd009426.jpeg https://dev.to/lfacpt en Luís Cardoso Tue, 04 Jun 2019 14:33:39 +0000 https://dev.to/lfacpt/guide-javascript-and-react-unit-tests-basics-5c8c https://dev.to/lfacpt/guide-javascript-and-react-unit-tests-basics-5c8c <p>I'm writing a two-part guide to JavaScript and React unit tests. The guide is aimed at people with some JavaScript experience but that never have written any tests and/or don't know the concepts.</p> <p>The first part covers the concepts and the second will be a tutorial to actually write the tests.</p> <p>You can find the first part of the guide <a href="https://medium.com/feedzaitech/javascript-and-react-unit-tests-basics-324e93dfc64c">here</a>.</p> <p>Let me know if you any comments, feedback is welcome!</p> javascript react beginners testing Luís Cardoso Thu, 09 May 2019 11:11:37 +0000 https://dev.to/lfacpt/introducing-brushable-histogram-1302 https://dev.to/lfacpt/introducing-brushable-histogram-1302 <p>Hey, just wanted to share our first React open source component: Brushable Histogram!</p> <p><a href="https://media.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fthepracticaldev.s3.amazonaws.com%2Fi%2F9lb2ffn7q4kq8iq9ztsz.png" class="article-body-image-wrapper"><img src="https://media.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fthepracticaldev.s3.amazonaws.com%2Fi%2F9lb2ffn7q4kq8iq9ztsz.png" alt="Previews of the histogram"></a></p> <p>The Brushable Histogram is a time histogram with a brushable preview of the whole dataset below it.</p> <p>Besides React, the component also uses a lot of d3.</p> <p>If you want to know more about it you can read the launch <a href="https://medium.com/feedzaitech/introducing-brushable-histogram-6c6b0f0f60ca" rel="noopener noreferrer">blog post</a>.</p> <p>You can checkout the <a href="https://github.com/feedzai/brushable-histogram" rel="noopener noreferrer">Github repo</a> or the <a href="https://feedzai.github.io/brushable-histogram" rel="noopener noreferrer">demos</a> as well.</p> <p>Let me know if you have any feedback!</p> react javascript opensource