11 Understanding chartArea Positioning in Plugin in Chart JS | Chart JS Plugin Series

11 Understanding chartArea Positioning in Plugin in Chart JS | Chart JS Plugin Series

The chartArea positioning is the method to extract values from a chart and insert in your canvas in Chart JS. Understanding how to works give you complete control to design shapes in a plugin for your chart. How that connects with the values in canvas and how to draw in a canvas. Chart JS is in essence a simplified version of the canvas API in Javascript.

We will dive deep in this topic to explore the topic and look how to extract the values, pixel position and more.

This is quite an advance topic and requires solid understanding of the structure of Chart JS. Biggest challenge is understanding how to draw the line and how to pinpoint or extract the exact location. This is part of the Chart JS Plugin Series.

How to create a Chart JS Plugin?
The understanding of canvas and Chart JS is key for this. As canvas gives you full control. However finding the right datapoints from Chart JS is a struggle sometimes.

Let's explore how to do this in the latest updated version of Chartjs. Chart JS 3.4.1.

Got a question or special request about a specific item? Comment below and tell me your question. I will make sure to follow up on you!

Perhaps you want to learn even more about Javascript? Or even how to create charts with chart.js in Javascript?

Interested to learn about how to create charts? Check out below!

Check out the Chart JS Video Guide: https://www.chartjs3.com

⭐ Chart JS Udemy Course ⭐:
Enjoy this video and want to dive deeper in a real useful Chart JS Training? Check out my Chart JS course on Udemy, click this link: https://www.udemy.com/course/chart-js...

Chart JS tutorials for Beginners:
🎓 Beginners Serie:    • ChartJS intro creating a chart 2018 |...  

Chart JS tutorials for Intermediate:
👁️ Most Watched Chart JS Video:    • Update dynamic chart js | Chart.js Co...  
⭐ Personal Favorite Chart JS Video:    • How to make an interactive bar chart ...  

Chart JS Dashboard Series:
👍 Most Liked Video Series:
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Watch Part 2:    • How to make a chart dynamic with inpu...  ​​
Watch Part 3:    • How to add a dynamic colorpicker inpu...  

Why did I created these Chart JS video tutorials?
Have you ever used Excel where charts appear almost magically with a click on a button. You notice if you look at a chart or graph you can absorb information within seconds which would take you minutes if it is a table with data.

"A picture is worth a thousand words"

We all know that pictures and colors spark the mind. However, if you try to draw or code a 📊 bar chart or a 📈 line chart, or any type of chart in a Javascript library it is a big challenge. The documentation makes it hard and the it is very hard to work with a canvas tag.

Which was both logical and creative at the same time. And this is why I love charts as well. A chart is the closes to translating logic into visuals. Making the chart interactive is the best way to communicate your message to others.

If we know about this why is coding charts so complicated?

Because computer programming language is based on 100% logic. This is why when you look at Chart.JS, D3.JS, Chartist and other chart libraries in JS you will need to basically explain in logic to a computer what to make visual.

How and where can I help?

My goal and focus is on creating easy to understand Chart.JS videos so you can start using Chart JS in all your website endeavors making Chart.JS a topnotch and leading JS library for the years to come. Just like any programming library once more people use Chart JS it will attract more people to contribute and grow. The videos on Youtube and my complete course on Udemy are here to give a helping hand.

Seeing Chart.JS evolve from Chart.JS 1.0 to Chart.JS 3.0 and with their currently new expansion to Chart.JS 3.0 we can expect more new exciting charts in the near future.

About Chart.JS 3 | Chart JS 3
Chart JS is one of the most use Javascript libraries for the drawing charts. It is designed to create charts in the canvas tag which is great but at the same time slightly challenging for most people. However, knowing how to draw a chart will give you a big edge and most dashboards are consistently adding charts along data tables. Chart JS makes your data more alive and visually more appealing.

What type of charts can you make with Chart.JS?
With chart js you can make line chart, bar chart, pie chart, doughnut chart, scatter chart, polar area chart, radar chart, gauge chart and area chart. And with some clever tricks and visual adjustment more can be done.

#chartjs