JavaScript – Niels Lange

JavaScript30 – Day 19

In today’s lesson, I learned how to pipe webcam input and manipulate the stream on the fly. In comparison to the other lessons, this lesson required the use of npm. The final code can be found on Day 19 – Webcam Fun. Resources: Array.prototype.forEach() CanvasRenderingContext2D.drawImage() CanvasRenderingContext2D.getImageData() CanvasRenderingContext2D.putImageData() Document.createElement() Document.querySelector() Document.querySelectorAll() Element.innerHTML Element.setAttribute() EventTarget.addEventListener() HTMLCanvasElement.toDataURL() HTMLVideoElement MediaDevices.getUserMedia() […]

JavaScript30 – Day 18

In today’s exercise, I learned how to fetch all video lengths from a site and calculate the total duration of all videos. The exercise was mainly based on the functions map() and reduce(). The final code can be found on Day 18 – Adding Up Times with Reduce. Resources: Array.from() Array.prototype.map() Array.prototype.reduce() Math.floor()

JavaScript30 – Day 17

Another day, another exercise. Today, how to sort arrays without while ignoring the articles of the corresponding title. The exercise required a combination of replacing, sorting and mapping and the final code can be found on Day 17 – Sort Without Articles. Resources: Array.prototype.join() Array.prototype.map() Array.prototype.sort() String.prototype.replace() String.prototype.trim()

JavaScript30 – Day 16

In today’s exercise, I learned how to create a dynamic mouse shadow. As always, the final code can be found on Day 16 – Mouse Move Shadow. Resources: Document.querySelector() Event.target EventTarget.addEventListener() Math.round()

JavaScript30 – Day 15.5

Seems I was too focused on https://javascriptforwp.com/courses/bootcamp-jan-march-2019/ today. Just realized that I need to leave the hotel and won’t have time to take care of my daily exercises of https://javascript30.com today. Am I regretting this? Well, a bit. But I learned a lot about DOM handling today. And, on a side note, I got my VITAS […]

JavaScript30 – Day 15

Today’s lesson covered the secrets of using local storage. I learned how to create a small restaurant booking system, that stores the ordered dishes in the browser’s local storage. The final code can be found on Day 15 – LocalStorage. Resources: Document.querySelector() Element.matches() Event.preventDefault() EventTarget.addEventListener() JSON.parse() JSON.stringify() localStorage.getItem() Storage.setItem()

JavaScript30 – Day 14

In today’s lesson, I’ve learned the difference between copies and references or variables, arrays and objects. The final code can be found on 14 – JavaScript References VS Copying. Resources: Array.prototype.slice() Array.prototype.concat() Object.assign()

JavaScript30 – Day 13

Another day, another lesson. Today, I’ve learned how to fade in and out images based on scroll interactions. The final code can be found on 13 – Slide in on Scroll. Resources: TBD

JavaScript30 – Day 12

In today’s exercise, I’ve learned how to trigger an action when a user provides a specific key sequence. A potential use would be by adding easter eggs to websites. As always, the final code can be found on Day 12 – Key Sequence Detection. References: EventTarget.addEventListener() Array.prototype.push() Array.prototype.splice() Array.prototype.join() Array.prototype.includes()

JavaScript30 – Day 11

In today’s exercise, I learned how to create a custom video player that allows basic control as well as adjusting the video speed and the volume. The final code of the exercise can be found on 11 – Custom Video Player. Resources: Document.querySelector() Document.querySelectorAll() EventTarget.addEventListener() Array.prototype.forEach()