How to use the exportNamedDeclaration function from @babel/types
Find comprehensive JavaScript @babel/types.exportNamedDeclaration code examples handpicked from public code repositorys.
@babel/types.exportNamedDeclaration is a Babel plugin that generates a named export declaration for a given variable declaration.
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let hasExport = false; path.node.body.forEach(node => { hasExport = hasExport || t.isExportDeclaration(node); }); if (!hasExport) { const exportNode = t.exportNamedDeclaration(); t.addComment(exportNode, 'trailing', 'The above line is generated by conditional compilation, when no export detected after CC.'); path.node.body.push(exportNode); } }
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/*:: const { Union, Field, Interface, Method } = require('../store')*/ class TypeScriptBuilder extends AbstractJsBuilder { buildUnion(object/*: Union */) { const ast = bt.exportNamedDeclaration( bt.tSTypeAliasDeclaration( bt.identifier(object.name), undefined, bt.tSUnionType(object.variants.map((name) => (
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How does @babel/types.exportNamedDeclaration work?
@babel/types.exportNamedDeclaration
is a plugin for the Babel JavaScript compiler that generates a named export declaration for a given variable declaration.
When a variable is declared in a module, it is not automatically available to other modules unless it is explicitly exported. The exportNamedDeclaration
plugin allows you to automatically generate a named export declaration for a given variable declaration, simplifying the process of sharing variables between modules.
To use the plugin, you must first install it as a dependency in your project:
sqlnpm install @babel/types --save-dev
You can then configure Babel to use the plugin by adding it to your Babel configuration file (usually .babelrc
):
perl{
"plugins": [
"@babel/types/exportNamedDeclaration"
]
}
Once the plugin is configured, you can use it to generate named export declarations for your variable declarations. For example, the following code:
arduinoconst myVar = "Hello, World!";
Can be transformed by the exportNamedDeclaration
plugin into:
arduinoexport const myVar = "Hello, World!";
This allows other modules to import the myVar
variable using a named import declaration:
javascriptimport { myVar } from './my-module';
Overall, the exportNamedDeclaration
plugin provides a convenient way to generate named export declarations for your variable declarations, simplifying the process of sharing variables between modules and improving the modularity and maintainability of your code.
GitHub: openapi/preset-effector
![openapi profile picture](/openapi.png?size=40)
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const contractName = changeCase.camelCase(name) + changeCase.pascalCase(status[code].code); const contract = responses[code].content ? createContract(responses[code].content['application/json'].schema) : createNullContract(); const ast = t.exportNamedDeclaration( t.variableDeclaration('const', [ t.variableDeclarator(t.identifier(contractName), contract), ]), );
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GitHub: niksy/modernizr-esm
![niksy profile picture](/niksy.png?size=40)
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/* * Export `addTest` and `createAsyncTestListener` as named exports * so they can be used in async tests */ path.pushContainer('body', [ t.exportNamedDeclaration(null, [ t.exportSpecifier( t.identifier('addTest'), t.identifier('addTest') ),
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Ai Example
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const babel = require("@babel/core"); const t = require("@babel/types"); const code = `const myVar = "Hello, World!";`; const ast = babel.parseSync(code); const declaration = ast.program.body[0]; const exportDeclaration = t.exportNamedDeclaration(declaration); ast.program.body[0] = exportDeclaration; const output = babel.transformFromAstSync(ast, code); console.log(output.code); // "export const myVar = "Hello, World!";"
In this example, we first import the @babel/core and @babel/types modules using require. We then define a string code containing a variable declaration. Next, we parse the code using the parseSync method of @babel/core, which returns an abstract syntax tree (AST) representing the code. We extract the variable declaration from the AST by accessing the program.body[0] property. We then use the exportNamedDeclaration function of @babel/types to generate a named export declaration for the variable declaration. We replace the original variable declaration in the AST with the generated export declaration. Finally, we use the transformFromAstSync method of @babel/core to transform the modified AST back into code. The output of the script will be "export const myVar = "Hello, World!";", which is a valid named export declaration for the myVar variable. This example demonstrates how @babel/types.exportNamedDeclaration can be used to generate named export declarations for variable declarations in a programmatic way.
GitHub: SheikhSajid/jsx2svelte
![SheikhSajid profile picture](/SheikhSajid.png?size=40)
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function getExportNodeForProp(propName) { const identifier = t.identifier(propName); const vDeclarator = t.variableDeclarator(identifier); const vDeclaration = t.variableDeclaration('let', [vDeclarator]); const namedExport = t.exportNamedDeclaration(vDeclaration, [], null); return namedExport; }
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// Check if this name is reserved, if so, then bail out. if (check(name)) { return; } const decl = t.exportNamedDeclaration( t.variableDeclaration("let", [ t.variableDeclarator( path.node.left.property, t.memberExpression(
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/** * export type {A, B, C} */ function exportTypes(names: $ReadOnlyArray<string>): $FlowFixMe { const res = t.exportNamedDeclaration( undefined, names.map(name => t.exportSpecifier(t.identifier(name), t.identifier(name)), ),
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declaration.node.id = declaration.scope.generateUidIdentifier('default'); } } else { const id = declaration.scope.generateUidIdentifier('default'); const namedDecl = babelTypes.exportNamedDeclaration(null, [ babelTypes.exportSpecifier(babelTypes.identifier(id.name), babelTypes.identifier('default')), ]); namedDecl._blockHoist = child.node._blockHoist;
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t.program([ t.importDeclaration( exportNames.map((n) => t.importSpecifier(t.identifier(n), t.identifier(n))), t.stringLiteral(source) ), t.exportNamedDeclaration( t.variableDeclaration('const', [ t.variableDeclarator( t.identifier(nsName), t.objectExpression(
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@babel/types.identifier is the most popular function in @babel/types (20936 examples)