/
no-deprecated-data-object-declaration.js
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/
no-deprecated-data-object-declaration.js
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/**
* @fileoverview disallow using deprecated object declaration on data
* @author yoyo930021
*/
'use strict'
// ------------------------------------------------------------------------------
// Requirements
// ------------------------------------------------------------------------------
const utils = require('../utils')
function isOpenParen (token) {
return token.type === 'Punctuator' && token.value === '('
}
function isCloseParen (token) {
return token.type === 'Punctuator' && token.value === ')'
}
function getFirstAndLastTokens (node, sourceCode) {
let first = sourceCode.getFirstToken(node)
let last = sourceCode.getLastToken(node)
// If the value enclosed by parentheses, update the 'first' and 'last' by the parentheses.
while (true) {
const prev = sourceCode.getTokenBefore(first)
const next = sourceCode.getTokenAfter(last)
if (isOpenParen(prev) && isCloseParen(next)) {
first = prev
last = next
} else {
return { first, last }
}
}
}
// ------------------------------------------------------------------------------
// Rule Definition
// ------------------------------------------------------------------------------
module.exports = {
meta: {
type: 'problem',
docs: {
description: 'disallow using deprecated object declaration on data',
categories: ['vue3-essential'],
url: 'https://eslint.vuejs.org/rules/no-deprecated-data-object-declaration.html'
},
fixable: 'code',
schema: [],
messages: {
objectDeclarationIsDeprecated: "Object declaration on \'data\' property is deprecated. Using function declaration instead."
}
},
create (context) {
const sourceCode = context.getSourceCode()
return utils.executeOnVue(context, (obj) => {
obj.properties
.filter(p =>
p.type === 'Property' &&
p.key.type === 'Identifier' &&
p.key.name === 'data' &&
p.value.type !== 'FunctionExpression' &&
p.value.type !== 'ArrowFunctionExpression' &&
p.value.type !== 'Identifier'
)
.forEach(p => {
context.report({
node: p,
messageId: 'objectDeclarationIsDeprecated',
fix (fixer) {
const tokens = getFirstAndLastTokens(p.value, sourceCode)
return [
fixer.insertTextBefore(tokens.first, 'function() {\nreturn '),
fixer.insertTextAfter(tokens.last, ';\n}')
]
}
})
})
})
}
}