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function transform(file, { j }, options) {
const root = j(file.source);
const { identifier } = removeImport('object.getprototypeof', root, j);
root
.find(j.CallExpression, {
callee: {
name: identifier
}
})
.replaceWith(({ node }) => {
return j.callExpression(
j.memberExpression(
j.identifier('Object'),
j.identifier('getPrototypeOf')
),
node.arguments
);
});
return root.toSource(options);
}
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
99
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var getPrototypeOf = require('object.getprototypeof');
var assert = require('assert');
assert.equal(getPrototypeOf(true), Boolean.prototype);
assert.equal(getPrototypeOf(42), Number.prototype);
assert.equal(getPrototypeOf(''), String.prototype);
assert.equal(getPrototypeOf(/a/g), RegExp.prototype);
assert.equal(getPrototypeOf(new Date()), Date.prototype);
assert.equal(getPrototypeOf(function () {}), Function.prototype);
assert.equal(getPrototypeOf([]), Array.prototype);
assert.equal(getPrototypeOf({}), Object.prototype);
Output
loading