/mdn-git/developer.mozilla.org/en-US/docs/Web/API/WebGL_API/By_example
Basic_scissoring Boilerplate_1 Canvas_size_and_WebGL Clearing_by_clicking Clearing_with_colors Color_masking Detect_WebGL Hello_GLSL Hello_vertex_attributes Raining_rectangles Scissor_animation Simple_color_animation Textures_from_code Video_textures