< All the HTML Tags >

Definition:

The HTML <rtc> tag is used within a <ruby> annotation to specify text that should be rendered only when the ruby text is present, essentially controlling the visibility of certain annotations.

This tag is particularly useful for situations where you want to include supplementary information that enhances the meaning of the ruby text but should not be displayed when the ruby is not rendered.

When the content is inside the `<rtc>` tag, it is typically displayed alongside the ruby text but can be omitted if the ruby annotations are not supported by the user's browser. This feature allows developers to create more flexible and informative annotations, enhancing user experience by providing relevant context without cluttering the display.