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/**
* @fileoverview disallow using deprecated events api
* @author yoyo930021
*/
'use strict'
const utils = require('../utils')
module.exports = {
meta: {
type: 'problem',
docs: {
description: 'disallow using deprecated events api (in Vue.js 3.0.0+)',
categories: ['vue3-essential'],
url: 'https://eslint.vuejs.org/rules/no-deprecated-events-api.html'
},
fixable: null,
schema: [],
messages: {
noDeprecatedEventsApi:
'The Events api `$on`, `$off` `$once` is deprecated. Using external library instead, for example mitt.'
}
},
/** @param {RuleContext} context */
create(context) {
return utils.defineVueVisitor(context, {
/** @param {MemberExpression & ({parent: CallExpression} | {parent: ChainExpression & {parent: CallExpression}})} node */
'CallExpression > MemberExpression, CallExpression > ChainExpression > MemberExpression'(
node
) {
const call =
node.parent.type === 'ChainExpression'
? node.parent.parent
: node.parent
if (call.optional) {
// It is OK because checking whether it is deprecated.
// e.g. `this.$on?.()`
return
}
if (
utils.skipChainExpression(call.callee) !== node ||
!['$on', '$off', '$once'].includes(
utils.getStaticPropertyName(node) || ''
)
) {
return
}
if (!utils.isThis(node.object, context)) {
return
}
context.report({
node: node.property,
messageId: 'noDeprecatedEventsApi'
})
}
})
}
}