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/**
* @fileoverview disallow using deprecated object declaration on data
* @author yoyo930021
*/
'use strict'
const utils = require('../utils')
/** @param {Token} token */
function isOpenParen(token) {
return token.type === 'Punctuator' && token.value === '('
}
/** @param {Token} token */
function isCloseParen(token) {
return token.type === 'Punctuator' && token.value === ')'
}
/**
* @param {Expression} node
* @param {SourceCode} sourceCode
*/
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 }
}
}
}
module.exports = {
meta: {
type: 'problem',
docs: {
description:
'disallow using deprecated object declaration on data (in Vue.js 3.0.0+)',
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."
}
},
/** @param {RuleContext} context */
create(context) {
const sourceCode = context.getSourceCode()
return utils.executeOnVue(context, (obj) => {
const invalidData = utils.findProperty(
obj,
'data',
(p) =>
p.value.type !== 'FunctionExpression' &&
p.value.type !== 'ArrowFunctionExpression' &&
p.value.type !== 'Identifier'
)
if (invalidData) {
context.report({
node: invalidData,
messageId: 'objectDeclarationIsDeprecated',
fix(fixer) {
const tokens = getFirstAndLastTokens(invalidData.value, sourceCode)
return [
fixer.insertTextBefore(tokens.first, 'function() {\nreturn '),
fixer.insertTextAfter(tokens.last, ';\n}')
]
}
})
}
})
}
}