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Blacklist confusing global variables #2130

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merged 5 commits into from
May 14, 2017
Merged

Blacklist confusing global variables #2130

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d032897
Blacklist confusing global variables
sidoshi May 12, 2017
854f7c6
Blacklist globals
sidoshi May 13, 2017
54ab0df
Fix kitchensink test to lint
gaearon May 14, 2017
c5e4c05
Edit the list
gaearon May 14, 2017
8a6399c
Use no-restricted globals for this
gaearon May 14, 2017
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68 changes: 67 additions & 1 deletion packages/eslint-config-react-app/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,72 @@
// In the future, we might create a separate list of rules for production.
// It would probably be more strict.

// The ESLint browser environment defines all browser globals as valid,
// even though most people don't know some of them exist (e.g. `name` or `status`).
// This is dangerous as it hides accidentally undefined variables.
// We blacklist the globals that we deem potentially confusing.
// To use them, explicitly reference them, e.g. `window.name` or `window.status`.
var restrictedGlobals = [
'addEventListener',
'blur',
'close',
'closed',
'confirm',
'defaultStatus',
'defaultstatus',
'event',
'external',
'find',
'focus',
'frameElement',
'frames',
'history',
'innerHeight',
'innerWidth',
'length',
'location',
'locationbar',
'menubar',
'moveBy',
'moveTo',
'name',
'onblur',
'onerror',
'onfocus',
'onload',
'onresize',
'onunload',
'open',
'opener',
'opera',
'outerHeight',
'outerWidth',
'pageXOffset',
'pageYOffset',
'parent',
'print',
'removeEventListener',
'resizeBy',
'resizeTo',
'screen',
'screenLeft',
'screenTop',
'screenX',
'screenY',
'scroll',
'scrollbars',
'scrollBy',
'scrollTo',
'scrollX',
'scrollY',
'self',
'status',
'statusbar',
'stop',
'toolbar',
'top',
];

module.exports = {
root: true,

Expand Down Expand Up @@ -121,7 +187,7 @@ module.exports = {
'no-this-before-super': 'warn',
'no-throw-literal': 'warn',
'no-undef': 'error',
'no-restricted-globals': ['error', 'event'],
'no-restricted-globals': ['error'].concat(restrictedGlobals),
'no-unexpected-multiline': 'warn',
'no-unreachable': 'warn',
'no-unused-expressions': [
Expand Down
2 changes: 1 addition & 1 deletion packages/react-scripts/fixtures/kitchensink/src/App.js
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Expand Up @@ -54,7 +54,7 @@ class App extends Component {
}

componentDidMount() {
const feature = location.hash.slice(1);
const feature = window.location.hash.slice(1);
switch (feature) {
case 'array-destructuring':
import(
Expand Down