63 lines
1.7 KiB
JavaScript
63 lines
1.7 KiB
JavaScript
/**
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* @fileoverview Rule to check use of chained assignment expressions
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* @author Stewart Rand
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*/
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"use strict";
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//------------------------------------------------------------------------------
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// Rule Definition
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//------------------------------------------------------------------------------
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module.exports = {
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meta: {
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type: "suggestion",
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docs: {
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description: "disallow use of chained assignment expressions",
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category: "Stylistic Issues",
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recommended: false,
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url: "https://eslint.org/docs/rules/no-multi-assign"
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},
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schema: [{
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type: "object",
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properties: {
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ignoreNonDeclaration: {
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type: "boolean",
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default: false
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}
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},
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additionalProperties: false
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}],
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messages: {
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unexpectedChain: "Unexpected chained assignment."
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}
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},
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create(context) {
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//--------------------------------------------------------------------------
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// Public
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//--------------------------------------------------------------------------
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const options = context.options[0] || {
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ignoreNonDeclaration: false
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};
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const targetParent = options.ignoreNonDeclaration ? ["VariableDeclarator"] : ["AssignmentExpression", "VariableDeclarator"];
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return {
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AssignmentExpression(node) {
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if (targetParent.indexOf(node.parent.type) !== -1) {
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context.report({
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node,
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messageId: "unexpectedChain"
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});
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}
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}
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};
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}
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};
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