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- /**
- * @fileoverview Rule to flag use of unary increment and decrement operators.
- * @author Ian Christian Myers
- * @author Brody McKee (github.com/mrmckeb)
- */
- "use strict";
- //------------------------------------------------------------------------------
- // Rule Definition
- //------------------------------------------------------------------------------
- module.exports = {
- meta: {
- type: "suggestion",
- docs: {
- description: "disallow the unary operators `++` and `--`",
- category: "Stylistic Issues",
- recommended: false,
- url: "https://eslint.org/docs/rules/no-plusplus"
- },
- schema: [
- {
- type: "object",
- properties: {
- allowForLoopAfterthoughts: {
- type: "boolean",
- default: false
- }
- },
- additionalProperties: false
- }
- ]
- },
- create(context) {
- const config = context.options[0];
- let allowInForAfterthought = false;
- if (typeof config === "object") {
- allowInForAfterthought = config.allowForLoopAfterthoughts === true;
- }
- return {
- UpdateExpression(node) {
- if (allowInForAfterthought && node.parent.type === "ForStatement") {
- return;
- }
- context.report({
- node,
- message: "Unary operator '{{operator}}' used.",
- data: {
- operator: node.operator
- }
- });
- }
- };
- }
- };
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