Non-standard legend alignment

Type tutorial

You can use position to place chart Legend on top, bottom, left, or right. In all those cases, Legend will center across the edge it is placed on. This tutorial will show some other alignment options. Left and right positions When legend position is set to either “left” or “right”, it is aligned vertically to […]

Toggling series via API

Type tutorial

Need to toggle series on and off via code? This short tutorial will show how. Hiding or showing Series in amCharts is a Sprite object. And just like any Sprite object, it can be toggled off by calling its hide() method, and shown back on by show(). That is it. You just call the respective […]

Generating multi-content PDF export

Type tutorial

This extensive tutorial will show how you can use pdfmake library, which is bundled with amCharts, to generate full page, multi-content report PDF documents. Disclaimer Majority of this tutorial is based on using pdfmake. It’s an excellent third party library enabling generating PDF documents in JavaScript. Our aim is to walk you through basics of […]

Automating report generation using Selenium Webdriver

Type tutorial

If you need to automate the generation of chart images or PDF, Selenium Webdriver might be the best option. It can handle different browsers even though this example only shows it using Firefox. Setting up Install NodeJS Install Firefox Create a folder Create a file called package.json in the new folder with the content shown […]

Chart element class names and CSS

Type tutorial

amCharts 4 allows automatically adding element-specific class attributes to its SVG elements for easy targeting via CSS selectors. This tutorial explains how to enable and use them. Enabling class names By default, when chart is generating SVG elements, no class attributes are added to it’s element. Let’s take a simple Line series with bullets: The […]

Modifying big number prefixes

Type tutorial

amCharts’ number formatter has a way of formatting numbers in a variety of ways, including converting to prefix/suffix-based shorter equivalents. This tutorial will explain how you can tweak it according to your needs. The problem Extremely big numbers on a chart can be confusing and wasteful of space: Let’s see how we can fix that. […]

Truncating legend labels

Type tutorial

Sometimes chart legend can get out of control size-wise, especially if you have long labels. This tutorial will show how you can get it back in check by capping the length of its labels. The problem Long labels will bloat up legend size. This is especially prominent where chart size is not very big: Even […]

Lazy loading amCharts modules

Type tutorial

It is possible to load the amCharts library only when needed. This tutorial will explain how. The import() expression is the official way to lazy load any ES6 module, including amCharts. However, import() can only import a single module, so you have to combine it with Promise.all to load multiple modules. Here is how to […]

Using curved labels

Type tutorial

In amCharts 4 any SVG label can follow any curve. This tutorial will explain how it works and how you can spice up the look of your charts in various situations, using curved labels. The basics All text labels in amCharts 4 are represented by an object of type Label. To make a label follow […]

Styling or removing tooltip shadow

Type tutorial

Most of the elements on charts can display a tooltip when hovered. By default, a tooltip will cast a slight shadow behind it. This tutorial will explain on how to style it, or get rid of it altogether. Accessing tooltip Before we can start, let’s see how we can access the tooltip, that is Tooltip […]