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Description
TypeScript Version: 2.5.3
Code:
let canvas: HTMLCanvasElement = document.createElement("canvas");
let ctx: CanvasRenderingContext2D = canvas.getContext("2d");
ctx.fillRect(0, 0, canvas.width, canvas.height);Expected behavior:
No errors should occur because the type of canvas is HTMLCanvasElement.
Actual behavior:
test.ts(2,5): error TS2322: Type 'CanvasRenderingContext2D | null' is not assignable to type 'CanvasRenderingContext2D'.
Type 'null' is not assignable to type 'CanvasRenderingContext2D'.
If I change the type of ctx to CanvasRenderingContext2D | null, then I get
test.ts(3,1): error TS2531: Object is possibly 'null'.
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