本文整理匯總了TypeScript中babel-types.isImportDeclaration函數的典型用法代碼示例。如果您正苦於以下問題：TypeScript isImportDeclaration函數的具體用法？TypeScript isImportDeclaration怎麽用？TypeScript isImportDeclaration使用的例子？那麽, 這裏精選的函數代碼示例或許可以為您提供幫助。
在下文中一共展示了isImportDeclaration函數的3個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的TypeScript代碼示例。
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();
}
}
}
});
}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')
))
})示例3:
const isAsyncImported = ast.program.body.some(statement => {
return t.isImportDeclaration(statement) && statement.source.value === ASYNC_PACKAGE_NAME
})