charlike
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Small, fast, simple and streaming project scaffolder for myself, but not only. Supports hundreds of template engines through the @JSTransformers API or if you want custom `render` function passed through options
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JavaScript
/**
* @fileoverview A rule to disallow negated left operands of the `in` operator
* @author Michael Ficarra
* @deprecated in ESLint v3.3.0
*/
;
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
module.exports = {
meta: {
docs: {
description: "disallow negating the left operand in `in` expressions",
category: "Possible Errors",
recommended: true,
replacedBy: ["no-unsafe-negation"]
},
deprecated: true,
schema: []
},
create(context) {
return {
BinaryExpression(node) {
if (node.operator === "in" && node.left.type === "UnaryExpression" && node.left.operator === "!") {
context.report(node, "The 'in' expression's left operand is negated.");
}
}
};
}
};