If you meant a specific "Rexo Web" product, please clarify. Otherwise, this guide focuses on OpenGL fundamentals + how to bring it to the web.
WebGL requires shaders to be written in GLSL (OpenGL Shading Language) and compiled at runtime, which introduces latency. Rexo Web pre-compiles and caches shaders using a binary cache, reducing load times by up to 70%. opengl by rexo web
GLint loc = glGetUniformLocation(shaderProgram, "uTime");
glUniform1f(loc, (float)glfwGetTime());