TS2722: Cannot invoke an object which is possibly ‘undefined‘.
问题描述graphRef.current?.zoom(0.9)graphRef.current可能是undefind，用可选链调用zoom方法，结果ts报错TS2722: Cannot invoke an object which is possibly 'undefined'.，百度了半天也没找到答案，在此记录一下问题解决方法。解决方法graphRef.current?.zoom!(0.9)zoom方法后面加上!就行了...
