February 2019
Beginner to intermediate
284 pages
6h 20m
English
Content preview from Learn Chart.js
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HTML legends
If you have a very complex legend or wish to display a legend outside the Canvas mixed with the HTML in your page, you can generate custom HTML legends. To create them, you need an empty <div> block:
<div id="chart-legends"></div>
So, the legend can be attached to the page’s body. Then, you implement a callback function for the Chart.defaults.global.legendCallback property or options.legendCallback that returns the HTML for the legend. You can create the content dynamically and apply CSS styles with property values copied from the chart. The HTML is generated with chart.generateLegend().
It’s easier with an example. The following code implements a simple HTML legend from an HTML list. You can run the full code in Legend/legend-2-html-callback.html ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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