node-I2djs

What is node-i2djs?

node-i2djs is a server side node module for rendering canvas based 2D graphics. node-i2djs provides a declarative and out of the box virtual Dom interface for easy and efficient rendering. It provides APIs to create and modify graphical content and export it in various media formats like Images/PDFs.. etc. node-i2djs is based on node canvas module.

What does it provide?

node-i2djs declarative approach provides an easy way to define different types of geometrical entities, as supported in SVG. It also enables pixel manipulations, multimedia support, PDF creations.. etc

It provides API's to create, access, modify, and delete graphical entities on canvas. Functionalities such as Data Joins (Join-Actions) help in associating/binding data with graphical elements and their manipulations. The following node-i2djs features helps in achieving efficient and scalable rendering:

• Declarative Rendering: Simple syntax and semantics by abstracting complex native syntax. Inline with client - I2Djs framework.
• Virtual DOM tree: node-I2Djs (all contexts) implements a mini Virtual DOM tree, which is a Javascript object representation of the corresponding DOM. Helps in keeping the state intact and enable operations such as update, addition and deletion as per the requirements.
• Join-Actions(Data Joins): node-i2djs Join-Action mechanism helps in binding the data to the graphical elements by defining the actions - Enter, Update and Exit. It provides flexible handlers to manipulate data and trigger corresponding actions in an optimal way.
• Multi page PDF / media support: node-i2djs lets u export the content in different media formats. It also provides exclusive apis to create multi page graphical PDFs.

Example

Click on below example to explore node-i2djs