plugin-import.js

let babel = require('@babel/core');
let t = require('babel-types');
const code = "import {Button,Alert} from 'antd'";
module.exports = {
    visitor: {
        ImportDeclaration(path) {
            let { node } = path;
            let source = node.source.value;
            if (!/antd$/.test(source)) {
                return;
            }
            let specifiers = node.specifiers;
            if (!t.isImportDefaultSpecifier(specifiers[0])) {
                specifiers = specifiers.map((v, i) => {
                    return t.importDeclaration(
                        [t.importDefaultSpecifier(v.local)],
                        t.stringLiteral(`${source}/lib/${v.local.name.toLowerCase()}`)
                    )
                })
                path.replaceWithMultiple(specifiers);
            }
        }
    }
}
// const ast = babel.transform(code, {
//     plugins: [importPlugin]
// });
// const newCode = ast.code;
// console.log(newCode)