forked from zhurui/management
40 lines
1.1 KiB
JavaScript
40 lines
1.1 KiB
JavaScript
|
/**
|
||
|
|
* @fileoverview A rule to disallow negated left operands of the `in` operator
|
||
|
|
* @author Michael Ficarra
|
||
|
|
* @deprecated in ESLint v3.3.0
|
||
|
|
*/
|
||
|
|
|
||
|
|
"use strict";
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
// Rule Definition
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
module.exports = {
|
||
|
|
meta: {
|
||
|
|
docs: {
|
||
|
|
description: "disallow negating the left operand in `in` expressions",
|
||
|
|
category: "Possible Errors",
|
||
|
|
recommended: false,
|
||
|
|
replacedBy: ["no-unsafe-negation"],
|
||
|
|
url: "https://eslint.org/docs/rules/no-negated-in-lhs"
|
||
|
|
},
|
||
|
|
deprecated: true,
|
||
|
|
|
||
|
|
schema: []
|
||
|
|
},
|
||
|
|
|
||
|
|
create(context) {
|
||
|
|
|
||
|
|
return {
|
||
|
|
|
||
|
|
BinaryExpression(node) {
|
||
|
|
if (node.operator === "in" && node.left.type === "UnaryExpression" && node.left.operator === "!") {
|
||
|
|
context.report({ node, message: "The 'in' expression's left operand is negated." });
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
}
|
||
|
|
};
|