本文探讨了Internet Explorer 8对于HTML5中<canvas>元素的支持情况。由于IE8不支持<canvas>标签，使用document.createElement('canvas')创建的元素将被转换为通用HTML元素，并且不会提供getContext等方法。此外，文章还提到了IE8中关于保留字用作对象属性时可能出现的问题。
<canvas> is not supported
IE 8 does not support <canvas> and does not provide HTMLCanvasElement interface. If using document.createElement('canvas'), It will transform it to HTMLGenericElement and does not provide any method of <canvas>, i.e. getContext().
Reserve words can not be used in object property
IE 8 will throw error if using reserve words to define object properties. For examples, var a = { delete: 'delete' } will throw error.
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