89 lines
2.4 KiB
JavaScript
89 lines
2.4 KiB
JavaScript
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/**
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* @fileoverview Flag shouldComponentUpdate when extending PureComponent
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*/
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'use strict';
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const astUtil = require('../util/ast');
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const componentUtil = require('../util/componentUtil');
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const docsUrl = require('../util/docsUrl');
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const report = require('../util/report');
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// ------------------------------------------------------------------------------
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// Rule Definition
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// ------------------------------------------------------------------------------
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const messages = {
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noShouldCompUpdate: '{{component}} does not need shouldComponentUpdate when extending React.PureComponent.',
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};
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/** @type {import('eslint').Rule.RuleModule} */
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module.exports = {
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meta: {
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docs: {
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description: 'Disallow usage of shouldComponentUpdate when extending React.PureComponent',
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category: 'Possible Errors',
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recommended: false,
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url: docsUrl('no-redundant-should-component-update'),
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},
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messages,
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schema: [],
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},
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create(context) {
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/**
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* Checks for shouldComponentUpdate property
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* @param {ASTNode} node The AST node being checked.
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* @returns {boolean} Whether or not the property exists.
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*/
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function hasShouldComponentUpdate(node) {
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const properties = astUtil.getComponentProperties(node);
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return properties.some((property) => {
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const name = astUtil.getPropertyName(property);
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return name === 'shouldComponentUpdate';
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});
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}
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/**
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* Get name of node if available
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* @param {ASTNode} node The AST node being checked.
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* @return {string} The name of the node
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*/
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function getNodeName(node) {
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if (node.id) {
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return node.id.name;
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}
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if (node.parent && node.parent.id) {
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return node.parent.id.name;
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}
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return '';
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}
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/**
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* Checks for violation of rule
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* @param {ASTNode} node The AST node being checked.
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*/
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function checkForViolation(node) {
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if (componentUtil.isPureComponent(node, context)) {
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const hasScu = hasShouldComponentUpdate(node);
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if (hasScu) {
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const className = getNodeName(node);
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report(context, messages.noShouldCompUpdate, 'noShouldCompUpdate', {
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node,
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data: {
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component: className,
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},
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});
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}
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}
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}
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return {
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ClassDeclaration: checkForViolation,
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ClassExpression: checkForViolation,
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};
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},
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};
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