@lwc/babel-plugin-component

This babel plugin does the following transform:

• Global decorator transform:
  • Transform @api decorator to publicProperties and publicMethods static properties.
  • Transform @wire decorator to wire static property.
  • Transform @track decorator to track static property.
• LWC component class sugar syntax:
  • Check for misspelled lifecycle hooks.
  • Import and inject render from a collocated template if a component class doesn't already implement a render method.
• Optimization:
  • If the compiler inject the default template a component, it will also wire the template style to the component.