vue hello world项目
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/**
* @fileoverview Enforces component's data property to be a function.
* @author Armano
*/
'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 }
}
}
}
// ------------------------------------------------------------------------------
// Rule Definition
// ------------------------------------------------------------------------------
module.exports = {
meta: {
type: 'problem',
docs: {
description: "enforce component's data property to be a function",
categories: ['vue3-essential', 'essential'],
url: 'https://eslint.vuejs.org/rules/no-shared-component-data.html'
},
fixable: 'code',
schema: []
},
/** @param {RuleContext} context */
create(context) {
const sourceCode = context.getSourceCode()
return utils.executeOnVueComponent(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,
message: '`data` property in component must be a function.',
fix(fixer) {
const tokens = getFirstAndLastTokens(invalidData.value, sourceCode)
return [
fixer.insertTextBefore(tokens.first, 'function() {\nreturn '),
fixer.insertTextAfter(tokens.last, ';\n}')
]
}
})
}
})
}
}