next
Version:
The React Framework
81 lines (80 loc) • 3.6 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = NoAnonymousDefaultExport;
var _chalk = _interopRequireDefault(require("chalk"));
function _interopRequireDefault(obj) {
return obj && obj.__esModule ? obj : {
default: obj
};
}
function NoAnonymousDefaultExport({ types: t , ...babel }) {
let onWarning = null;
babel.caller((caller)=>{
onWarning = caller.onWarning;
return '' // Intentionally empty to not invalidate cache
;
});
if (typeof onWarning !== 'function') {
return {
visitor: {
}
};
}
const warn = onWarning;
return {
visitor: {
ExportDefaultDeclaration (path) {
const def = path.node.declaration;
if (!(def.type === 'ArrowFunctionExpression' || def.type === 'FunctionDeclaration')) {
return;
}
switch(def.type){
case 'ArrowFunctionExpression':
{
warn([
_chalk.default.yellow.bold('Anonymous arrow functions cause Fast Refresh to not preserve local component state.'),
'Please add a name to your function, for example:',
'',
_chalk.default.bold('Before'),
_chalk.default.cyan('export default () => <div />;'),
'',
_chalk.default.bold('After'),
_chalk.default.cyan('const Named = () => <div />;'),
_chalk.default.cyan('export default Named;'),
'',
`A codemod is available to fix the most common cases: ${_chalk.default.cyan('https://nextjs.link/codemod-ndc')}`,
].join('\n'));
break;
}
case 'FunctionDeclaration':
{
const isAnonymous = !Boolean(def.id);
if (isAnonymous) {
warn([
_chalk.default.yellow.bold('Anonymous function declarations cause Fast Refresh to not preserve local component state.'),
'Please add a name to your function, for example:',
'',
_chalk.default.bold('Before'),
_chalk.default.cyan('export default function () { /* ... */ }'),
'',
_chalk.default.bold('After'),
_chalk.default.cyan('export default function Named() { /* ... */ }'),
'',
`A codemod is available to fix the most common cases: ${_chalk.default.cyan('https://nextjs.link/codemod-ndc')}`,
].join('\n'));
}
break;
}
default:
{
// eslint-disable-next-line @typescript-eslint/no-unused-vars
const _ = def;
}
}
}
}
};
}
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