To follow the advancement of MJML 4, please have a look at this PR: #706

Breaking changes

MJML doesn't use React anymore, meaning custom components created for a previous version of MJML don't work anymore
mj-container and mj-body are merged into a single mj-body component. Templates created for a previous version of MJML to be adapted to reflect this change.
The structure of the mj-social component changes for more consistency, following the semantic structure below. Templates created for a previous version of MJML to be adapted to reflect this change.

<mj-social>
  <mj-social-link name="facebook" ... />
  <mj-social-link src="custom-icon-url" ... />
</mj-social>

Features

mj-column now supports the padding attribute (especially useful to create gutters between columns!) (#160)
Full-width sections are now correctly displayed in Outlook desktop (#284)
mj-raw doesn't alter the xml/html content anymore (such as auto-closing tags) and is added in the HTML output where it is expected (cf #485 & #600)
The new component mj-breakpoint enables to change the default breakpoint used by MJML
The new API createComponent enables you to render MJML inside a component without importing it
Attributes inheritance is now supported when using MJML inside components