Method getOptionalExpressionType

internal/checker/checker.go:28821–28830

(exprType *Type, expression *ast.Node)

}

func (c *Checker) getOptionalExpressionType(exprType *Type, expression *ast.Node) *Type {
	switch {
	case ast.IsExpressionOfOptionalChainRoot(expression):
		return c.GetNonNullableType(exprType)
	case ast.IsOptionalChain(expression):
		return c.removeOptionalTypeMarker(exprType)
	default:
		return exprType
	}
}

func (c *Checker) removeOptionalTypeMarker(t *Type) *Type {
	if c.strictNullChecks {