#require-atomic-updates

#Configuration

import { defineConfig, js } from '@rslint/core';

export default defineConfig([
  js.configs.recommended,
  {
    rules: {
      'require-atomic-updates': 'error',
    },
  },
]);

#Rule Details

Disallow assignments that can lead to race conditions due to usage of await or yield.

This rule reports assignments to variables or properties in cases where the assignments may be based on outdated values. When a variable is read, then an await or yield pauses execution, the variable might be modified by another concurrent operation before the assignment completes.

Examples of incorrect code for this rule:

let result;

async function foo() {
  result += await something;
}

async function bar() {
  result = result + (await something);
}

function* baz() {
  result += yield;
}

Examples of correct code for this rule:

let result;

async function foo() {
  result = (await something) + result;
}

async function bar() {
  const tmp = await something;
  result += tmp;
}

async function baz() {
  let localVar = 0;
  localVar += await something;
}

#Options

#allowProperties

When set to true, the rule does not report assignments to properties (only variables).

{ "require-atomic-updates": ["error", { "allowProperties": true }] }

async function foo(obj) {
  if (!obj.done) {
    obj.something = await getSomething(); // OK with allowProperties
  }
}

#Original Documentation

ESLint - require-atomic-updates