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Need pattern for typescript when use useRef
const CanvasMap = () => {
      const canvasFef = React.useRef<HTMLInputElement>(null)
      useEffect(() => {
        canvasFef && canvasFef.current && cities.forEach(function (item) {
             // logic here
        })
      }, [canvasFef]);
      return (
          <canvas id="canvas"
                  ref={canvasFef}
          ></canvas>
      )
    };

I got error

Property 'getContext' does not exist on type 'HTMLInputElement'

TS2322: Type 'MutableRefObject' is not assignable to type 'LegacyRef'. Type 'MutableRefObject' is not assignable to type 'RefObject'. Types of property 'current' are incompatible. Type 'HTMLInputElement' is missing the following properties from type 'HTMLCanvasElement': captureStream, getContext, toBlob, toDataURL

about 4 years ago · Juan Pablo Isaza
1 answers
Answer question

0

const canvasFef = React.useRef<HTMLCanvasElement | null>(null);

Try this.

about 4 years ago · Juan Pablo Isaza Report
Answer question
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