TypeScript babel-types.isImportDeclaration函数代码示例

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本文整理汇总了TypeScript中babel-types.isImportDeclaration函数的典型用法代码示例。如果您正苦于以下问题：TypeScript isImportDeclaration函数的具体用法？TypeScript isImportDeclaration怎么用？TypeScript isImportDeclaration使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。

在下文中一共展示了isImportDeclaration函数的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的TypeScript代码示例。

示例1: _deduplicateImportStatements

 /**
  * Attempts to reduce the number of distinct import declarations by combining
  * those referencing the same source into the same declaration. Results in
  * deduplication of imports of the same item as well.
  *
  * Before:
  *     import {a} from './module-1.js';
  *     import {b} from './module-1.js';
  *     import {c} from './module-2.js';
  * After:
  *     import {a,b} from './module-1.js';
  *     import {c} from './module-2.js';
  */
 private _deduplicateImportStatements(node: babel.Node) {
   const importDeclarations = new Map<string, babel.ImportDeclaration>();
   traverse(node, {
     noScope: true,
     ImportDeclaration: {
       enter(path: NodePath) {
         const importDeclaration = path.node;
         if (!babel.isImportDeclaration(importDeclaration)) {
           return;
         }
         const source = babel.isStringLiteral(importDeclaration.source) &&
             importDeclaration.source.value;
         if (!source) {
           return;
         }
         const hasNamespaceSpecifier = importDeclaration.specifiers.some(
             (s) => babel.isImportNamespaceSpecifier(s));
         const hasDefaultSpecifier = importDeclaration.specifiers.some(
             (s) => babel.isImportDefaultSpecifier(s));
         if (!importDeclarations.has(source) && !hasNamespaceSpecifier &&
             !hasDefaultSpecifier) {
           importDeclarations.set(source, importDeclaration);
         } else if (importDeclarations.has(source)) {
           const existingDeclaration = importDeclarations.get(source)!;
           for (const specifier of importDeclaration.specifiers) {
             existingDeclaration.specifiers.push(specifier);
           }
           path.remove();
         }
       }
     }
   });
 }

开发者ID:Polymer，项目名称:vulcanize，代码行数:46，代码来源:es6-rewriter.ts

示例2: it

it('should move static apis under "Taro"', function () {
  const code = `
    import { noop } from '@tarojs/taro-h5';
    noop;
    noop();
  `

  const result = babel.transform(code, { plugins: [pluginOptions] })
  expect(result.code).toMatchSnapshot();

  const ast = result.ast as t.File
  const body = ast.program.body as [t.ImportDeclaration, t.ExpressionStatement]
  expect(t.isImportDeclaration(body[0])).toBeTruthy()
  expect(t.isExpressionStatement(body[1])).toBeTruthy()
  const defaultImport = body[0].specifiers.find(v => t.isImportDefaultSpecifier(v))
  expect(defaultImport).toBeTruthy()

  const taroName = defaultImport!.local.name
  let memberExpression = body[1].expression
  if (t.isCallExpression(body[1])) {
    memberExpression = (body[1].expression as t.CallExpression).callee
  }
  expect(memberExpression).toMatchObject(t.memberExpression(
    t.identifier(taroName),
    t.identifier('noop')
  ))
})

开发者ID:YangShaoQun，项目名称:taro，代码行数:27，代码来源:index-test.ts

示例3:

 const isAsyncImported = ast.program.body.some(statement => {
   return t.isImportDeclaration(statement) && statement.source.value === ASYNC_PACKAGE_NAME
 })

开发者ID:teachat8，项目名称:taro，代码行数:3，代码来源:index.ts

注：本文中的babel-types.isImportDeclaration函数示例整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。