@typescript-eslint/eslint-plugin
Version:
TypeScript plugin for ESLint
61 lines (60 loc) • 2.54 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const utils_1 = require("@typescript-eslint/utils");
const util_1 = require("../util");
exports.default = (0, util_1.createRule)({
name: 'no-dynamic-delete',
meta: {
type: 'suggestion',
docs: {
description: 'Disallow using the `delete` operator on computed key expressions',
recommended: 'strict',
},
fixable: 'code',
messages: {
dynamicDelete: 'Do not delete dynamically computed property keys.',
},
schema: [],
},
defaultOptions: [],
create(context) {
function createFixer(member) {
if (member.property.type === 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 !== utils_1.AST_NODE_TYPES.MemberExpression ||
!node.argument.computed ||
isAcceptableIndexExpression(node.argument.property)) {
return;
}
context.report({
node: node.argument.property,
messageId: 'dynamicDelete',
fix: createFixer(node.argument),
});
},
};
function createPropertyReplacement(property, replacement) {
return (fixer) => fixer.replaceTextRange(getTokenRange(property), replacement);
}
function getTokenRange(property) {
return [
(0, util_1.nullThrows)(context.sourceCode.getTokenBefore(property), util_1.NullThrowsReasons.MissingToken('token before', 'property')).range[0],
(0, util_1.nullThrows)(context.sourceCode.getTokenAfter(property), util_1.NullThrowsReasons.MissingToken('token after', 'property')).range[1],
];
}
},
});
function isAcceptableIndexExpression(property) {
return ((property.type === utils_1.AST_NODE_TYPES.Literal &&
['number', 'string'].includes(typeof property.value)) ||
(property.type === utils_1.AST_NODE_TYPES.UnaryExpression &&
property.operator === '-' &&
property.argument.type === utils_1.AST_NODE_TYPES.Literal &&
typeof property.argument.value === 'number'));
}