JQ - 解決 JQ中 carvas.getContext('2d') 報錯 canvas.getContext is not a function

在JQ中 carvas.getContext('2d')，報錯 Uncaught TypeError: canvas.getContext is not a function

 

var canvas = $('canvas'); var context = canvas.getContext('2d'); // 改為
var canvas = $('canvas'); var context = canvas.get(0).getContext('2d');