Evolution of the rest-frame equivalent width of Hα as a function of redshift. MACS1149-JD1 is represented by circles, and we distinguish between the values of the integrated galaxy (red) and the spatially resolved clumps N (green) and S (yellow). Additional data includes samples detected with JWST at redshifts of 3 < z < 7 (Boyett et al. 2024b); 6 (Sun et al. 2022; Ning et al. 2023; Prieto-Lyon et al. 2023); 7 and 8 (Rinaldi et al. 2023) as well as pre-JWST galaxies at redshifts 0.5 to 8. The pre-JWST value at redshift eight corresponds to the median stacking of a sample of 102 Lyman-break galaxies (Stefanon et al. 2022). The dashed dark red line represents the best fit to all data points, including the MIDIS sources, and described by a single law EW₀ (Hα) ∝ (1 + z)^2.1 by Rinaldi et al. (2023). The dotted broken line represents previous fits with pre-JWST data up to a redshift of six (Faisst et al. 2016).