OptionalnormalizedShould the attribute data be normalized?
The number of components in the attribute, i.e. 1 for a float, 2 for a vec2, 3 for a vec3, etc.
The data type of the attribute, one of the WEBGL_CONST values, i.e. WEBGL_CONST.FLOAT, WEBGL_CONST.UNSIGNED_BYTE, etc.
The name of the attribute as defined in the vertex shader.