• Canvas simple line animation


    Introduction: the simple line animation of canvas animation introduction series. Although it’s simple, there are quite a lot of wired animation application scenes, so I made a small demo, which is all in one. Step1: draw points Create tags first<canvas id=”canvas” width=”400″ height=”400″></canvas>Set the coordinates of several points const points = [ [200, 100], // […]

  • Basic theory calculus


    limit limit Slope The slope is positive and negative: The slope is a positive number, indicating that the original function is positively correlated with the independent variable, On the contrary, the original function is negatively correlated with the independent variable. The positive and negative slope can be used as a condition to judge the extreme […]