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/**
* @author Toru Nagashima <https://github.com/mysticatea>
* See LICENSE file in root directory for full license.
*/
"use strict"
const { isCommaToken } = require("../utils")
module.exports = {
meta: {
docs: {
description:
"disallow trailing commas in parameter/argument lists.",
category: "ES2017",
recommended: false,
url:
"http://mysticatea.github.io/eslint-plugin-es/rules/no-trailing-function-commas.html",
},
fixable: "code",
schema: [],
messages: {
forbidden:
"ES2017 trailing commas in parameter/argument lists are forbidden.",
},
},
create(context) {
const sourceCode = context.getSourceCode()
return {
":function"(node) {
const length = node.params.length
if (length === 0) {
return
}
const lastParam = node.params[length - 1]
const token = sourceCode.getTokenAfter(lastParam)
if (isCommaToken(token)) {
context.report({
loc: token.loc,
messageId: "forbidden",
fix(fixer) {
return fixer.remove(token)
},
})
}
},
"CallExpression, NewExpression"(node) {
const token = sourceCode.getLastToken(node, 1)
if (node.arguments.length >= 1 && isCommaToken(token)) {
context.report({
loc: token.loc,
messageId: "forbidden",
fix(fixer) {
return fixer.remove(token)
},
})
}
},
}
},
}