69 lines
1.5 KiB
JavaScript
69 lines
1.5 KiB
JavaScript
'use strict';
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const {isMethodCall} = require('./ast/index.js');
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const messages = {
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'error/charCodeAt': 'Prefer `String#codePointAt()` over `String#charCodeAt()`.',
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'error/fromCharCode': 'Prefer `String.fromCodePoint()` over `String.fromCharCode()`.',
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'suggestion/codePointAt': 'Use `String#codePointAt()`.',
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'suggestion/fromCodePoint': 'Use `String.fromCodePoint()`.',
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};
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const getReplacement = node => {
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if (isMethodCall(node, {
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method: 'charCodeAt',
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optionalCall: false,
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optionalMember: false,
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})) {
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return 'codePointAt';
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}
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if (isMethodCall(node, {
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object: 'String',
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method: 'fromCharCode',
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optionalCall: false,
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optionalMember: false,
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})) {
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return 'fromCodePoint';
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}
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};
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/** @param {import('eslint').Rule.RuleContext} context */
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const create = () => ({
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CallExpression(node) {
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const replacement = getReplacement(node);
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if (!replacement) {
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return;
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}
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const method = node.callee.property;
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const methodName = method.name;
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const fix = fixer => fixer.replaceText(method, replacement);
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return {
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node: method,
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messageId: `error/${methodName}`,
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suggest: [
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{
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messageId: `suggestion/${replacement}`,
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fix,
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},
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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 `String#codePointAt(…)` over `String#charCodeAt(…)` and `String.fromCodePoint(…)` over `String.fromCharCode(…)`.',
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recommended: true,
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},
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hasSuggestions: true,
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messages,
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},
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};
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