🏠 New in Low Baseline Support: WEBGL_compressed_texture_etc1 WebGL extension
March 24, 2020
The WEBGL_compressed_texture_etc1 extension for WebGL 1.0 and 2.0 contexts adds the ETC1 compressed texture format to compressedTexImage2D() and compressedTexSubImage2D().
Source features
api.WEBGL_compressed_texture_etc1[mdn]