PF

Uncaught DOMException: Failed to execute 'drawImage' on 'CanvasRenderingContext2D': The image argument is a canvas element with a width or height of 0

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**maptalks's version and what browser you use?** v1.0.0-rc.27 **Issue description**  地图有时会加载不出来，会报这个错误 **Please provide a reproduction URL (on any jsfiddle like site)** ----

 

### 版本 2.0.37 ### 重现步骤   看了下promise代码， 函数中有调用object函数，实际 Object.prototype.toString.call(value) 返回的是 [object Promise]，但和 '[object Object]' 进行比较永远是false /** * 是否promise对象 * @param {Object} value */ function promise(value) { return object(value) &&...