Fraction of He-dominated white dwarfs (f_He) as a function of effective temperature (T_eff) from the literature and J-PLUS. We split the comparison in four panels to improve visualization. In all panels, the red solid line is the best-fitting spectral evolution estimated from J-PLUS photometry. The red area encloses 68% of the solutions. The red dots show the J-PLUS values obtained from the posterior estimated with the spectral evolution prior applied. The black symbols labeled in the panels show results from the literature.