Interface WEBGL_compressed_texture_s3tc
interface WEBGL_compressed_texture_s3tc {
COMPRESSED_RGB_S3TC_DXT1_EXT: 33776;
COMPRESSED_RGBA_S3TC_DXT1_EXT: 33777;
COMPRESSED_RGBA_S3TC_DXT3_EXT: 33778;
COMPRESSED_RGBA_S3TC_DXT5_EXT: 33779;
}
COMPRESSED_RGB_S3TC_DXT1_EXT: 33776;
COMPRESSED_RGBA_S3TC_DXT1_EXT: 33777;
COMPRESSED_RGBA_S3TC_DXT3_EXT: 33778;
COMPRESSED_RGBA_S3TC_DXT5_EXT: 33779;
}
 Properties
ReadonlyCOMPRESSED_RGB_S3TC_DXT1_EXT    
COMPRESSED_RGB_S3TC_DXT1_EXT: 33776
ReadonlyCOMPRESSED_RGBA_S3TC_DXT1_EXT    
COMPRESSED_RGBA_S3TC_DXT1_EXT: 33777
ReadonlyCOMPRESSED_RGBA_S3TC_DXT3_EXT    
COMPRESSED_RGBA_S3TC_DXT3_EXT: 33778
ReadonlyCOMPRESSED_RGBA_S3TC_DXT5_EXT    
COMPRESSED_RGBA_S3TC_DXT5_EXT: 33779
The WEBGL_compressed_texture_s3tc extension is part of the WebGL API and exposes four S3TC compressed texture formats.
MDN Reference