canvas出现Uncaught TypeError: Cannot read property 'getContext' of null 错误
2016-10-21 09:11
2695 查看
在使用canvas的getcontext（“2d”）的时候，出现
可能原因是在html加载之前就运行了js，所以我们使用
$(document).ready(function(){
});
在这里面写canvas代码就可以了
Uncaught TypeError: Cannot read property 'getContext' of null错误
可能原因是在html加载之前就运行了js，所以我们使用
$(document).ready(function(){
});
在这里面写canvas代码就可以了
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