68 lines
1.7 KiB
JavaScript
68 lines
1.7 KiB
JavaScript
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'use strict';
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const {isNodeMatches} = require('./utils/is-node-matches.js');
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const {methodCallSelector, matches} = require('./selectors/index.js');
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const {removeMethodCall} = require('./fix/index.js');
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const MESSAGE_ID = 'prefer-array-flat-map';
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const messages = {
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[MESSAGE_ID]: 'Prefer `.flatMap(…)` over `.map(…).flat()`.',
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};
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const selector = [
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methodCallSelector('flat'),
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matches([
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'[arguments.length=0]',
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'[arguments.length=1][arguments.0.type="Literal"][arguments.0.raw="1"]',
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]),
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methodCallSelector({path: 'callee.object', method: 'map'}),
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].join('');
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const ignored = ['React.Children', 'Children'];
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/** @param {import('eslint').Rule.RuleContext} context */
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const create = context => ({
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[selector](flatCallExpression) {
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const mapCallExpression = flatCallExpression.callee.object;
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if (isNodeMatches(mapCallExpression.callee.object, ignored)) {
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return;
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}
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const sourceCode = context.getSourceCode();
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const mapProperty = mapCallExpression.callee.property;
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return {
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node: flatCallExpression,
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loc: {start: mapProperty.loc.start, end: flatCallExpression.loc.end},
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messageId: MESSAGE_ID,
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* fix(fixer) {
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// Removes:
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// map(…).flat();
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// ^^^^^^^
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// (map(…)).flat();
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// ^^^^^^^
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yield * removeMethodCall(fixer, flatCallExpression, sourceCode);
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// Renames:
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// map(…).flat();
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// ^^^
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// (map(…)).flat();
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// ^^^
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yield fixer.replaceText(mapProperty, 'flatMap');
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},
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};
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},
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});
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/** @type {import('eslint').Rule.RuleModule} */
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module.exports = {
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create,
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meta: {
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type: 'suggestion',
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docs: {
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description: 'Prefer `.flatMap(…)` over `.map(…).flat()`.',
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},
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fixable: 'code',
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messages,
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},
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};
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