/** * @fileoverview Forbid certain elements * @author Kenneth Chung */ 'use strict'; const has = require('object.hasown/polyfill')(); const docsUrl = require('../util/docsUrl'); const getText = require('../util/eslint').getText; const isCreateElement = require('../util/isCreateElement'); const report = require('../util/report'); // ------------------------------------------------------------------------------ // Rule Definition // ------------------------------------------------------------------------------ const messages = { forbiddenElement: '<{{element}}> is forbidden', forbiddenElement_message: '<{{element}}> is forbidden, {{message}}', }; module.exports = { meta: { docs: { description: 'Disallow certain elements', category: 'Best Practices', recommended: false, url: docsUrl('forbid-elements'), }, messages, schema: [{ type: 'object', properties: { forbid: { type: 'array', items: { anyOf: [ { type: 'string' }, { type: 'object', properties: { element: { type: 'string' }, message: { type: 'string' }, }, required: ['element'], additionalProperties: false, }, ], }, }, }, additionalProperties: false, }], }, create(context) { const configuration = context.options[0] || {}; const forbidConfiguration = configuration.forbid || []; const indexedForbidConfigs = {}; forbidConfiguration.forEach((item) => { if (typeof item === 'string') { indexedForbidConfigs[item] = { element: item }; } else { indexedForbidConfigs[item.element] = item; } }); function reportIfForbidden(element, node) { if (has(indexedForbidConfigs, element)) { const message = indexedForbidConfigs[element].message; report( context, message ? messages.forbiddenElement_message : messages.forbiddenElement, message ? 'forbiddenElement_message' : 'forbiddenElement', { node, data: { element, message, }, } ); } } return { JSXOpeningElement(node) { reportIfForbidden(getText(context, node.name), node.name); }, CallExpression(node) { if (!isCreateElement(context, node)) { return; } const argument = node.arguments[0]; if (!argument) { return; } const argType = argument.type; if (argType === 'Identifier' && /^[A-Z_]/.test(argument.name)) { reportIfForbidden(argument.name, argument); } else if (argType === 'Literal' && /^[a-z][^.]*$/.test(argument.value)) { reportIfForbidden(argument.value, argument); } else if (argType === 'MemberExpression') { reportIfForbidden(getText(context, argument), argument); } }, }; }, };