Function checkElementAccessChain

test/fixtures/snapshot/typescript.js:75225–75229

(node, checkMode)

                checkElementAccessExpression(node, checkNonNullExpression(node.expression), checkMode);
        }
        function checkElementAccessChain(node, checkMode) {
            var exprType = checkExpression(node.expression);
            var nonOptionalType = getOptionalExpressionType(exprType, node.expression);
            return propagateOptionalTypeMarker(checkElementAccessExpression(node, checkNonNullType(nonOptionalType, node.expression), checkMode), node, nonOptionalType !== exprType);
        }
        function checkElementAccessExpression(node, exprType, checkMode) {
            var objectType = ts.getAssignmentTargetKind(node) !== 0 /* AssignmentKind.None */ || isMethodAccessForCall(node) ? getWidenedType(exprType) : exprType;
            var indexExpression = node.argumentExpression;