CircularFLO Web Code & Widgets

Pieces of web code written using standard web code are already compliant with the EPUB standard.

Code & Widgets Panel

CircularFLO Web Code & Widgets
A panel added to the pasteboard to show information about placed code and widgets.

Top Level File Path

The complete path to the widget's location or to the primary HTML page for the placed code. Use the Check / Relink file paths tool in the CircularFLO Code & Widgets panel to check links are or to relink to a new file location.


When initially placing the code or widgets file, if any pixel dimension are found they are displayed. If the dimension are not specified then the width and height.

When pixel damsons are found, then scaling will be applied to the placed code and widgets in the resulting ebook. Edit the values in this panel if you wish to alter the scaling amount applied.

When altering the placeholder for the code on the page it is advisable to maintain the proportion of the frame. Tip: Hold the command and shift keys down to maintain the proportions of an InDesign frame when dragging to resize.

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CircularFLO Web Code & Widgets

Introduction to Web Code & Widgets

CircularFLO Web Code & Widgets
Use the CircularFLO Code & Widgets Tools to extend and add more interaction to your fixed layout EPUBs.

Because the fixed layout EPUB3 format is based on the latest web standards of HTML5, CSS3 and JavaScript it means that other pieces of web code written using these same languages are already compliant with the standard.

To pass EPUB validation the web code used must work offline and not contain references to external resources.

You don’t have to be a coder to create extra web code. We support code made by third party tools such BookWidgets, Tumult Hype, Adobe HTML5 animation apps, or virtually any other source including sharing sites like Codepen.

A widget is a local package of web code used on the Mac and with iBooks Author. CircularFLO allows widgets to be added to the InDesign page and exported out to fixed layout EPUB.

Web code will be scaled to fit the placeholder frame. There is no requirement to design the web code to a specific pixel dimensions although if using pixel graphics it may be recommended.

Just like a regular image link you are free to edit the code files outside of InDesign. The latest up-to-date version of the linked files will be incorporated into the ebook.

The CircularFLO Code & Widgets Tools panel (CircularFLO Window menu > Code & Widgets Tools) is used to web code to your documents typically for additional interactivity and complex animations.

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CircularFLO Web Code & Widgets