jsdoc-75lb
Version:
An API documentation generator for JavaScript.
30 lines (21 loc) • 837 B
JavaScript
/**
* @fileoverview Rule to flag comparisons to null without a type-checking
* operator.
* @author Ian Christian Myers
*/
;
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
module.exports = function(context) {
return {
"BinaryExpression": function(node) {
var badOperator = node.operator === "==" || node.operator === "!=";
if (node.right.type === "Literal" && node.right.raw === "null" && badOperator ||
node.left.type === "Literal" && node.left.raw === "null" && badOperator) {
context.report(node, "Use ‘===’ to compare with ‘null’.");
}
}
};
};
module.exports.schema = [];