Rainbow-delimiters-mode marks the closing angle brackets of jsx syntax
as mismatched because no matching chars seem to be specified in the jsx
syntax table.
These are the text properties of the opening angle bracket:
face (rainbow-delimiters-depth-2-face)
font-lock-multiline t
fontified t
js-jsx-close-tag-pos 97
js-jsx-syntax-table (4)
js-jsx-tag-beg (open . 57)
syntax-multiline t
syntax-table (4)
And these are the text properties of the closing angle bracket:
face (rainbow-delimiters-mismatched-face)
font-lock-multiline t
fontified t
js-jsx-syntax-table (5)
syntax-multiline t
syntax-table (5)