The EXT_texture_filter_anisotropic extension is part of the WebGL API and exposes two constants for anisotropic filtering (AF).

MDN Reference

interface EXT_texture_filter_anisotropic {
    MAX_TEXTURE_MAX_ANISOTROPY_EXT: 34047;
    TEXTURE_MAX_ANISOTROPY_EXT: 34046;
}

Properties

MAX_TEXTURE_MAX_ANISOTROPY_EXT: 34047
TEXTURE_MAX_ANISOTROPY_EXT: 34046