Javascript更新不附加div截图 [英] Javascript to update not append div screenshot

问题描述

我需要这个脚本来更新而不是追加到画布。当用户单击该按钮时，将创建另一个图像。我需要覆盖图像而不是追加。这是 JS小提琴



我有什么试过：



小提琴是试图找到解决方案来截取div元素的结果。我能够这样做，只需要能够更新并不附加截图。

I need this script to update and not append to canvas. When the user clicks the button another image is created. I need to overwrite the image and not append. Here is the JS Fiddle

What I have tried:

The fiddle is the result of trying to find a solution to take a screenshot of a div element. I am able to do as such, just need to be able to update and not append the screenshot.

推荐答案

更新 JSFiddle [ ^ ]

updated JSFiddle[^]

html2canvas(

（＃widget），{
onrendered：function （画布）{
theCanvas = canvas;
var _canvas =

("#widget"), { onrendered: function(canvas) { theCanvas = canvas; var _canvas =

（'canvas'）[0];
count ++;

('canvas')[0]; count++;

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