eslint-plugin-try-catch-failsafe

eslint-plugin-try-catch-failsafe

Make sure to use try-catch to wrap up some dangerous actions!

Installation

Use package manager to install this plugin.

npm install --save-dev eslint-plugin-try-catch-failsafe
yarn add -D eslint-plugin-try-catch-failsafe
pnpm add -D eslint-plugin-try-catch-failsafe

Usage

Add this plugin to your ESLint configuration.

{
  "extends": [
    "plugin:try-catch-failsafe/default"
  ]
}

Rules

try-catch-failsafe/json-parse

• Default: error
• Fixable: false

Make sure to use try-catch to wrap up JSON.parse. Notice that the JSON.parse in catch or finally block may also throw an error in JavaScript, so we should wrap them up too.

// ❌ Error
JSON.parse('{"foo": "bar"}');

// ❌ Error
try {
  // some code that may throw an error
} catch (e) {
  JSON.parse('{"foo": "bar"}');
}

// ❌ Error
try {
  // some code that may throw an error
} finally {
  JSON.parse('{"foo": "bar"}');
}

// ✅ OK
try {
  JSON.parse('{"foo": "bar"}');
} catch (e) {
  console.error(e);
}

// ✅ OK
try {
  // some code that may throw an error
} finally {
  try {
    JSON.parse('{"foo": "bar"}');
  } finally {}
}

If you are confident that the JSON.parse will not throw an error, you can disable this rule.

try-catch-failsafe/new-url

• Default: error
• Fixable: false

Make sure to use try-catch to wrap up new URL(). Notice that the new URL() in catch or finally block may also throw an error in JavaScript, so we should wrap them up too.

// ❌ Error
new URL('');

// ❌ Error
try {
  // some code that may throw an error
} catch (e) {
  new URL('');
}

// ❌ Error
try {
  // some code that may throw an error
} finally {
  new URL('');
}

// ✅ OK
try {
  new URL('');
} catch (e) {
  console.error(e);
}

// ✅ OK
try {
  // some code that may throw an error
} finally {
  try {
    new URL('');
  } finally {}
}

If you are confident that the new URL() will not throw an error, you can disable this rule.