forked from zhurui/management
36 lines
943 B
JavaScript
36 lines
943 B
JavaScript
/**
|
|
* @fileoverview Rule to flag comparisons to the value NaN
|
|
* @author James Allardice
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Rule Definition
|
|
//------------------------------------------------------------------------------
|
|
|
|
module.exports = {
|
|
meta: {
|
|
docs: {
|
|
description: "require calls to `isNaN()` when checking for `NaN`",
|
|
category: "Possible Errors",
|
|
recommended: true,
|
|
url: "https://eslint.org/docs/rules/use-isnan"
|
|
},
|
|
|
|
schema: []
|
|
},
|
|
|
|
create(context) {
|
|
|
|
return {
|
|
BinaryExpression(node) {
|
|
if (/^(?:[<>]|[!=]=)=?$/.test(node.operator) && (node.left.name === "NaN" || node.right.name === "NaN")) {
|
|
context.report({ node, message: "Use the isNaN function to compare with NaN." });
|
|
}
|
|
}
|
|
};
|
|
|
|
}
|
|
};
|