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Bokeh Version 0.13.0 (June 2018) is an incremental update that adds a few new features and fixes several bugs. Some of the highlights include:

And several other bug fixes and docs additions. For full details see the CHANGELOG.

Migration Guide

NOTE: the 0.13.x series is a final series of small releases leading to a 1.0 release. For more information see the project roadmap.

Max Websocket Message Size

A new command line option --websocket-max-message-size for the Bokeh server can be used to configure the Tornado websocket_max_message_size option. The default value is now 20mb, an increase from the previous 10mb implicit default.

New Hover fields

Two new hover tooltip fields are now available:

Both of these are especially useful in conjunction with stacked bar plots.

BokehJS Build

The gulp tool was previously used as the build system for BokehJS. This has been replaced with a smaller and simpler build script. This greatly reduced the number of dependencies required to build BokehJS and a completely clean NPM package security audit was obtained as a side effect.

To build now, run the command node make build instead of gulp build. Task names remained unchanged. If you want preserve the old workflow, e.g. to aid git bisect, it is suggested to create an alias for node make, e.g. in bash this would be alias gulp='node make'.

Line Join Default

The default line_join style has been changed from miter to bevel, to avoid exaggerating corners where connected lines meet at a sharp angle. The HTML Canvas miterLimit property is meant to prevent such issues, but it does not appear to be respected by current browsers.