Constnium/node_modules/eslint-plugin-es/lib/rules/no-optional-chaining.js
2022-06-23 02:27:43 +02:00

61 lines
1.9 KiB
JavaScript

/**
* @author Yosuke Ota <https://github.com/ota-meshi>
* See LICENSE file in root directory for full license.
*/
"use strict"
module.exports = {
meta: {
docs: {
description: "disallow optional chaining.",
category: "ES2020",
recommended: false,
url:
"http://mysticatea.github.io/eslint-plugin-es/rules/no-optional-chaining.html",
},
fixable: null,
messages: {
forbidden: "ES2020 optional chaining is forbidden.",
},
schema: [],
type: "problem",
},
create(context) {
const sourceCode = context.getSourceCode()
/**
* Checks if the given token is a `?.` token or not.
* @param {Token} token The token to check.
* @returns {boolean} `true` if the token is a `?.` token.
*/
function isQuestionDotToken(token) {
return (
token.value === "?." &&
(token.type === "Punctuator" || // espree has been parsed well.
// espree@7.1.0 doesn't parse "?." tokens well. Therefore, get the string from the source code and check it.
sourceCode.getText(token) === "?.")
)
}
return {
"CallExpression[optional=true]"(node) {
context.report({
node: sourceCode.getTokenAfter(
node.callee,
isQuestionDotToken
),
messageId: "forbidden",
})
},
"MemberExpression[optional=true]"(node) {
context.report({
node: sourceCode.getTokenAfter(
node.object,
isQuestionDotToken
),
messageId: "forbidden",
})
},
}
},
}