OES_standard_derivatives
The OES_standard_derivatives extension is part of the WebGL API and adds the GLSL derivative functions dFdx, dFdy, and fwidth.
interface OES_standard_derivatives {
readonly FRAGMENT_SHADER_DERIVATIVE_HINT_OES: GLenum;
}The OES_standard_derivatives extension is part of the WebGL API and adds the GLSL derivative functions dFdx, dFdy, and fwidth.