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