Minecraft wiki entry for Raw_JSON_text_format, associated text: 1 Java Edition
1.1 Content types
1.1.1 Plain Text
1.1.2 Translated Text
1.1.3 Scoreboard Value
1.1.4 Entity Names
1.1.5 Keybind
1.1.6 NBT Values
1.2 Component resolution
2 Bedrock Edition
2.1 Appending
2.2 Breaking lines
2.3 Translate
2.4 With
2.5 %%s
2.6 Multiple %s
2.7 Ordering with %%#
2.8 Formatting
3 History
4 See also
5 Notes
6 References