Canvas realize scraping and scraping music JS realize scraping music __js

Canvas realize scraping and scraping music JS realize scraping and scraping music

* * Ideas:
(1) First need a box positioning to determine where the scraping area you want to put
(2) There is a box in the positioning box, which is to put the prize
(3) Use a canvas (canvas) to cover the top of the box
(4) When the hand touch move, you can erase some of the canvas, exposing the trophy area
(5) When erasing enough (1/3), you can choose to let the canvas disappear automatically * *

because there is not much content, directly on the code, there are annotations, to change things on two pictures, change the path on the line and the imported Jquery.js script package

<! DOCTYPE html style= "width:100%; height:100% ">