eslint-plugin-lit
Version:
lit-html support for ESLint
43 lines (42 loc) • 1.73 kB
JavaScript
/**
* @fileoverview Disallows properties shadowed as class fields
* @author Michel Langeveld <https://github.com/michellangeveld>
*/
import { getClassFields, getPropertyMap, isLitClass, hasLitPropertyDecorator } from '../util.js';
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
export const rule = {
meta: {
docs: {
description: 'Disallows properties shadowed as class fields',
recommended: true,
url: 'https://github.com/43081j/eslint-plugin-lit/blob/master/docs/rules/no-classfield-shadowing.md'
},
schema: [],
messages: {
noClassfieldShadowing: 'The {{ prop }} property is a class field which has the same name as ' +
'a reactive property which could have unintended side-effects.'
}
},
create(context) {
return {
ClassDeclaration: (node) => {
if (isLitClass(node)) {
const propertyMap = getPropertyMap(node);
const classMembers = getClassFields(node);
for (const [prop, { key }] of propertyMap.entries()) {
const member = classMembers.get(prop);
if (member && !hasLitPropertyDecorator(member)) {
context.report({
node: key,
messageId: 'noClassfieldShadowing',
data: { prop }
});
}
}
}
}
};
}
};