Bug reports:
Failed to execute 'createPattern' on 'CanvasRenderingContext2D': The image argument is a canvas element with a width or height of 0.

I console the value of width and height , find that the height is less than 1 caught this error

Specifications:

• html2canvas version tested with: 1.4.1
• Browser & version: chrome latest
• Operating system: windows 10

solution：
calculateBackgroundRendering function return value width height may be less than 1
and createPattern function throw error