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/**
* @author Yosuke Ota
* See LICENSE file in root directory for full license.
*/
'use strict'
const utils = require('../utils')
/**
* @param {VDirective} vBindAppear
*/
function isValidBindAppear(vBindAppear) {
if (
vBindAppear.value?.expression &&
vBindAppear.value.expression.type === 'Literal'
) {
return vBindAppear.value.expression?.value !== false
}
return true
}
/**
* @param {string[]} directives
*/
function createDirectiveList(directives) {
let str = ''
for (const [index, directive] of directives.entries()) {
if (index === 0) {
str += `\`v-${directive}\``
} else if (index < directives.length - 1) {
str += `, \`v-${directive}\``
} else {
str += ` or \`v-${directive}\``
}
}
return str
}
module.exports = {
meta: {
type: 'problem',
docs: {
description:
'require control the display of the content inside `<transition>`',
categories: ['vue3-essential'],
url: 'https://eslint.vuejs.org/rules/require-toggle-inside-transition.html'
},
fixable: null,
schema: [
{
type: 'object',
properties: {
additionalDirectives: {
type: 'array',
items: {
type: 'string'
},
uniqueItems: true
}
},
additionalProperties: false
}
],
messages: {
expected:
'The element inside `<transition>` is expected to have a {{allowedDirectives}} directive.'
}
},
/** @param {RuleContext} context */
create(context) {
/** @type {Array<string>} */
const additionalDirectives =
(context.options[0] && context.options[0].additionalDirectives) || []
const allowedDirectives = ['if', 'show', ...additionalDirectives]
const allowedDirectivesString = createDirectiveList(allowedDirectives)
/**
* Check if the given element has display control.
* @param {VElement} element The element node to check.
*/
function verifyInsideElement(element) {
if (utils.isCustomComponent(element)) {
return
}
/** @type VElement */ // @ts-expect-error
const parent = element.parent
const vBindAppear = utils.getDirective(parent, 'bind', 'appear')
if (
utils.hasAttribute(parent, 'appear') ||
(vBindAppear && isValidBindAppear(vBindAppear))
) {
return
}
if (
element.name !== 'slot' &&
!allowedDirectives.some((directive) =>
utils.hasDirective(element, directive)
) &&
!utils.hasDirective(element, 'bind', 'key')
) {
context.report({
node: element.startTag,
loc: element.startTag.loc,
messageId: 'expected',
data: {
allowedDirectives: allowedDirectivesString
}
})
}
}
return utils.defineTemplateBodyVisitor(context, {
/** @param {VElement} node */
"VElement[name='transition'] > VElement"(node) {
const child = node.parent.children.find(utils.isVElement)
if (child !== node) {
return
}
verifyInsideElement(node)
}
})
}
}