function transform(file, { j }, options) { const root = j(file.source); let dirtyFlag = false; const { identifier } = removeImport('object.hasown', root, j); root .find(j.CallExpression, { callee: { type: 'Identifier', name: identifier } }) .forEach((path) => { const args = path.value.arguments; const newExpression = j.callExpression( j.memberExpression(j.identifier('Object'), j.identifier('hasOwn')), //@ts-ignore args ); j(path).replaceWith(newExpression); dirtyFlag = true; }); return dirtyFlag ? root.toSource(options) : file.source; } export default transform; function removeImport(name, root, j) { // Find the import or require statement for 'is-boolean-object' const importDeclaration = root.find(j.ImportDeclaration, { source: { value: name } }); const requireDeclaration = root .find(j.CallExpression, { callee: { name: 'require' }, arguments: [ { value: name } ] }) .closest(j.VariableDeclarator); // Require statements without declarations like `Object.is = require("object-is");` const requireAssignment = root.find(j.AssignmentExpression, { operator: '=', right: { callee: { name: 'require' }, arguments: [ { value: name } ] } }); // Side effect requires statements like `require("error-cause/auto");` const sideEffectRequireExpression = root.find(j.ExpressionStatement, { expression: { callee: { name: 'require' }, arguments: [ { value: name } ] } }); // Return the identifier name, e.g. 'fn' in `import { fn } from 'is-boolean-object'` // or `var fn = require('is-boolean-object')` const identifier = importDeclaration.paths().length > 0 ? importDeclaration.get().node.specifiers[0].local.name : requireDeclaration.paths().length > 0 ? requireDeclaration.find(j.Identifier).get().node.name : requireAssignment.paths().length > 0 ? requireAssignment.find(j.Identifier).get().node.name : null; importDeclaration.remove(); requireDeclaration.remove(); requireAssignment.remove(); sideEffectRequireExpression.remove(); const dirtyFlag = importDeclaration.length > 0 || requireDeclaration.length > 0 || requireAssignment.length > 0 || sideEffectRequireExpression.length > 0; return { identifier, dirtyFlag }; }
Input
var assert = require('assert'); var hasOwn = require('object.hasown'); var obj = { a: 1, b: 2 }; assert(hasOwn(obj, 'a')); assert(hasOwn(obj, 'b')); assert('toString' in obj && !hasOwn(obj, 'toString')); if (!Object.hasOwn) { hasOwn.shim(); } assert.deepEqual(Object.hasOwn(obj, 'a'), hasOwn(obj, 'a'));
Output
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