no-class-assign.js•1.77 kB
/**
* @fileoverview A rule to disallow modifying variables of class declarations
* @author Toru Nagashima
*/
"use strict";
const astUtils = require("./utils/ast-utils");
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
/** @type {import('../shared/types').Rule} */
module.exports = {
meta: {
type: "problem",
docs: {
description: "Disallow reassigning class members",
recommended: true,
url: "https://eslint.org/docs/latest/rules/no-class-assign"
},
schema: [],
messages: {
class: "'{{name}}' is a class."
}
},
create(context) {
const sourceCode = context.sourceCode;
/**
* Finds and reports references that are non initializer and writable.
* @param {Variable} variable A variable to check.
* @returns {void}
*/
function checkVariable(variable) {
astUtils.getModifyingReferences(variable.references).forEach(reference => {
context.report({ node: reference.identifier, messageId: "class", data: { name: reference.identifier.name } });
});
}
/**
* Finds and reports references that are non initializer and writable.
* @param {ASTNode} node A ClassDeclaration/ClassExpression node to check.
* @returns {void}
*/
function checkForClass(node) {
sourceCode.getDeclaredVariables(node).forEach(checkVariable);
}
return {
ClassDeclaration: checkForClass,
ClassExpression: checkForClass
};
}
};