33 lines
917 B
TypeScript
33 lines
917 B
TypeScript
import { TSESTree } from "@typescript-eslint/experimental-utils";
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import { createRule } from "./utils";
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export = createRule({
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name: "no-in-operator",
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meta: {
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docs: {
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description: ``,
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category: "Best Practices",
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recommended: "error",
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},
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messages: {
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noInOperatorError: `Don't use the 'in' keyword - use 'hasProperty' to check for key presence instead`,
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},
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schema: [],
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type: "suggestion",
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},
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defaultOptions: [],
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create(context) {
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const IN_OPERATOR = "in";
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const checkInOperator = (node: TSESTree.BinaryExpression) => {
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if (node.operator === IN_OPERATOR) {
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context.report({ messageId: "noInOperatorError", node });
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}
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};
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return {
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BinaryExpression: checkInOperator,
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};
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},
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});
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