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no-dupe-keys.js
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no-dupe-keys.js
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/**
* @fileoverview Prevents duplication of field names.
* @author Armano
*/
'use strict'
const { findVariable } = require('@eslint-community/eslint-utils')
const utils = require('../utils')
/**
* @typedef {import('../utils').GroupName} GroupName
* @typedef {import('eslint').Scope.Variable} Variable
* @typedef {import('../utils').ComponentProp} ComponentProp
*/
/** @type {GroupName[]} */
const GROUP_NAMES = ['props', 'computed', 'data', 'methods', 'setup']
module.exports = {
meta: {
type: 'problem',
docs: {
description: 'disallow duplication of field names',
categories: ['vue3-essential', 'essential'],
url: 'https://eslint.vuejs.org/rules/no-dupe-keys.html'
},
fixable: null, // or "code" or "whitespace"
schema: [
{
type: 'object',
properties: {
groups: {
type: 'array'
}
},
additionalProperties: false
}
]
},
/** @param {RuleContext} context */
create(context) {
const options = context.options[0] || {}
const groups = new Set([...GROUP_NAMES, ...(options.groups || [])])
return utils.compositingVisitors(
utils.executeOnVue(context, (obj) => {
const properties = utils.iterateProperties(obj, groups)
/** @type {Set<string>} */
const usedNames = new Set()
for (const o of properties) {
if (usedNames.has(o.name)) {
context.report({
node: o.node,
message: "Duplicated key '{{name}}'.",
data: {
name: o.name
}
})
}
usedNames.add(o.name)
}
}),
utils.defineScriptSetupVisitor(context, {
onDefinePropsEnter(node, props) {
for (const prop of props) {
if (!prop.propName) continue
const variable = findVariable(context.getScope(), prop.propName)
if (!variable || variable.defs.length === 0) continue
context.report({
node: variable.defs[0].node,
message: "Duplicated key '{{name}}'.",
data: {
name: prop.propName
}
})
}
}
})
)
}
}