Function visitImportDeclaration

test/fixtures/snapshot/typescript.js:93809–93828

* Visits an import declaration, eliding it if it is type-only or if it has an import clause that may be elided. * * @param node The import declaration node.

(node)

         * @param node The import declaration node.
         */
        function visitImportDeclaration(node) {
            if (!node.importClause) {
                // Do not elide a side-effect only import declaration.
                //  import "foo";
                return node;
            }
            if (node.importClause.isTypeOnly) {
                // Always elide type-only imports
                return undefined;
            }
            // Elide the declaration if the import clause was elided.
            var importClause = ts.visitNode(node.importClause, visitImportClause, ts.isImportClause);
            return importClause ||
                compilerOptions.importsNotUsedAsValues === 1 /* ImportsNotUsedAsValues.Preserve */ ||
                compilerOptions.importsNotUsedAsValues === 2 /* ImportsNotUsedAsValues.Error */
                ? factory.updateImportDeclaration(node, 
                /*decorators*/ undefined, 
                /*modifiers*/ undefined, importClause, node.moduleSpecifier, node.assertClause)
                : undefined;
        }
        /**
         * Visits an import clause, eliding it if its `name` and `namedBindings` may both be elided.
         *