Function transformNullishCoalescingExpression

test/fixtures/snapshot/typescript.js:97579–97589

(node)

            return factory.createBinaryExpression(factory.createBinaryExpression(left, factory.createToken(invert ? 36 /* SyntaxKind.EqualsEqualsEqualsToken */ : 37 /* SyntaxKind.ExclamationEqualsEqualsToken */), factory.createNull()), factory.createToken(invert ? 56 /* SyntaxKind.BarBarToken */ : 55 /* SyntaxKind.AmpersandAmpersandToken */), factory.createBinaryExpression(right, factory.createToken(invert ? 36 /* SyntaxKind.EqualsEqualsEqualsToken */ : 37 /* SyntaxKind.ExclamationEqualsEqualsToken */), factory.createVoidZero()));
        }
        function transformNullishCoalescingExpression(node) {
            var left = ts.visitNode(node.left, visitor, ts.isExpression);
            var right = left;
            if (!ts.isSimpleCopiableExpression(left)) {
                right = factory.createTempVariable(hoistVariableDeclaration);
                left = factory.createAssignment(right, left);
            }
            return ts.setTextRange(factory.createConditionalExpression(createNotNullCondition(left, right), 
            /*questionToken*/ undefined, right, 
            /*colonToken*/ undefined, ts.visitNode(node.right, visitor, ts.isExpression)), node);
        }
        function visitDeleteExpression(node) {
            return ts.isOptionalChain(ts.skipParentheses(node.expression))
                ? ts.setOriginalNode(visitNonOptionalExpression(node.expression, /*captureThisArg*/ false, /*isDelete*/ true), node)