no-dynamic-delete.js
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"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
const experimental_utils_1 = require("@typescript-eslint/experimental-utils");
const tsutils = __importStar(require("tsutils"));
const util = __importStar(require("../util"));
exports.default = util.createRule({
name: 'no-dynamic-delete',
meta: {
docs: {
category: 'Best Practices',
description: 'Disallow the delete operator with computed key expressions',
recommended: false,
},
fixable: 'code',
messages: {
dynamicDelete: 'Do not delete dynamically computed property keys.',
},
schema: [],
type: 'suggestion',
},
defaultOptions: [],
create(context) {
function createFixer(member) {
if (member.property.type === experimental_utils_1.AST_NODE_TYPES.Literal &&
typeof member.property.value === 'string') {
return createPropertyReplacement(member.property, `.${member.property.value}`);
}
return undefined;
}
return {
'UnaryExpression[operator=delete]'(node) {
if (node.argument.type !== experimental_utils_1.AST_NODE_TYPES.MemberExpression ||
!node.argument.computed ||
isNecessaryDynamicAccess(diveIntoWrapperExpressions(node.argument.property))) {
return;
}
context.report({
fix: createFixer(node.argument),
messageId: 'dynamicDelete',
node: node.argument.property,
});
},
};
function createPropertyReplacement(property, replacement) {
return (fixer) => fixer.replaceTextRange(getTokenRange(property), replacement);
}
function getTokenRange(property) {
const sourceCode = context.getSourceCode();
return [
sourceCode.getTokenBefore(property).range[0],
sourceCode.getTokenAfter(property).range[1],
];
}
},
});
function diveIntoWrapperExpressions(node) {
if (node.type === experimental_utils_1.AST_NODE_TYPES.UnaryExpression) {
return diveIntoWrapperExpressions(node.argument);
}
return node;
}
function isNecessaryDynamicAccess(property) {
if (property.type !== experimental_utils_1.AST_NODE_TYPES.Literal) {
return false;
}
if (typeof property.value === 'number') {
return true;
}
return (typeof property.value === 'string' &&
!tsutils.isValidPropertyAccess(property.value));
}
//# sourceMappingURL=no-dynamic-delete.js.map