Avoid shadowed variables in javascript

The rule no-shadow gets enabled in the version eslint-config-wikimedia
0.17.0.
In prepration for the automatic update with libup this needs to be done
in a separate patch set due to T262450

Change-Id: I66d405aef6d2b777e9a7f63734f2b5a5649d2080

package.json

@@ -67,7 +67,7 @@
 	"bundlesize": [
 		{
 			"path": "resources/dist/index.js",
-			"maxSize": "13.64kB"
+			"maxSize": "13.7kB"
 		}
 	]
 }

src/actions.js

@@ -149,12 +149,12 @@ export function fetch( gateway, title, el, token, type ) {
 			} )
 			.catch( ( err, data ) => {
 				const exception = new Error( err );
-				const type = data && data.textStatus && data.textStatus === 'abort' ?
+				const fetchType = data && data.textStatus && data.textStatus === 'abort' ?
 					types.FETCH_ABORTED : types.FETCH_FAILED;
 
 				exception.data = data;
 				dispatch( {
-					type,
+					type: fetchType,
 					el,
 					token
 				} );

src/changeListeners/eventLogging.js

@@ -19,8 +19,8 @@ export default function eventLogging(
 	boundActions, eventLoggingTracker, getCurrentTimestamp
 ) {
 	return ( _, state ) => {
-		const eventLogging = state.eventLogging;
+		const eventLoggingObj = state.eventLogging;
-		let event = eventLogging.event;
+		let event = eventLoggingObj.event;
 
 		if ( !event ) {
 			return;
@@ -33,7 +33,7 @@ export default function eventLogging(
 		// Rightly or wrongly, it's left as an exercise for the analyst to
 		// calculate the time at which the interaction started as part of their
 		// analyses, e.g. https://phabricator.wikimedia.org/T186016#4002923.
-		event = $.extend( true, {}, eventLogging.baseData, event, {
+		event = $.extend( true, {}, eventLoggingObj.baseData, event, {
 			timestamp: getCurrentTimestamp()
 		} );
 

src/changeListeners/settings.js

@@ -6,7 +6,7 @@
  * @return {ext.popups.ChangeListener}
  */
 export default function settings( boundActions, render ) {
-	let settings;
+	let settingsObj;
 
 	return ( prevState, state ) => {
 		if ( !prevState ) {
@@ -20,25 +20,25 @@ export default function settings( boundActions, render ) {
 			state.settings.shouldShow === true
 		) {
 			// Lazily instantiate the settings UI
-			if ( !settings ) {
+			if ( !settingsObj ) {
-				settings = render( boundActions );
+				settingsObj = render( boundActions );
-				settings.appendTo( document.body );
+				settingsObj.appendTo( document.body );
 			}
 
 			// Update the UI settings with the current settings
-			settings.setEnabled( state.preview.enabled );
+			settingsObj.setEnabled( state.preview.enabled );
 
-			settings.show();
+			settingsObj.show();
 		} else if (
 			prevState.settings.shouldShow === true &&
 			state.settings.shouldShow === false
 		) {
-			settings.hide();
+			settingsObj.hide();
 		}
 
 		// Update help visibility
 		if ( prevState.settings.showHelp !== state.settings.showHelp ) {
-			settings.toggleHelp( state.settings.showHelp );
+			settingsObj.toggleHelp( state.settings.showHelp );
 		}
 	};
 }

src/changeListeners/statsv.js

@@ -12,10 +12,10 @@
  */
 export default function statsv( boundActions, track ) {
 	return ( _, state ) => {
-		const statsv = state.statsv;
+		const statsvObj = state.statsv;
 
-		if ( statsv.action ) {
+		if ( statsvObj.action ) {
-			track( statsv.action, statsv.data );
+			track( statsvObj.action, statsvObj.data );
 
 			boundActions.statsvLogged();
 		}

src/index.js

@@ -115,36 +115,36 @@ function getCurrentTimestamp() {
  * [store](http://redux.js.org/docs/api/Store.html#store).
  *
  * @param {Redux.Store} store
- * @param {Object} actions
+ * @param {Object} registerActions
  * @param {UserSettings} userSettings
  * @param {Function} settingsDialog
  * @param {PreviewBehavior} previewBehavior
  * @param {EventTracker} statsvTracker
  * @param {EventTracker} eventLoggingTracker
  * @param {EventTracker} pageviewTracker
- * @param {Function} getCurrentTimestamp
+ * @param {Function} callbackCurrentTimestamp
  * @return {void}
  */
 function registerChangeListeners(
-	store, actions, userSettings, settingsDialog, previewBehavior,
+	store, registerActions, userSettings, settingsDialog, previewBehavior,
-	statsvTracker, eventLoggingTracker, pageviewTracker, getCurrentTimestamp
+	statsvTracker, eventLoggingTracker, pageviewTracker, callbackCurrentTimestamp
 ) {
 	registerChangeListener( store, changeListeners.footerLink( actions ) );
 	registerChangeListener( store, changeListeners.linkTitle() );
 	registerChangeListener( store, changeListeners.render( previewBehavior ) );
 	registerChangeListener(
-		store, changeListeners.statsv( actions, statsvTracker ) );
+		store, changeListeners.statsv( registerActions, statsvTracker ) );
 	registerChangeListener(
 		store, changeListeners.syncUserSettings( userSettings ) );
 	registerChangeListener(
-		store, changeListeners.settings( actions, settingsDialog ) );
+		store, changeListeners.settings( registerActions, settingsDialog ) );
 	registerChangeListener(
 		store,
 		changeListeners.eventLogging(
-			actions, eventLoggingTracker, getCurrentTimestamp
+			registerActions, eventLoggingTracker, callbackCurrentTimestamp
 		) );
 	registerChangeListener( store,
-		changeListeners.pageviews( actions, pageviewTracker )
+		changeListeners.pageviews( registerActions, pageviewTracker )
 	);
 }
 

src/ui/renderer.js

@@ -360,12 +360,12 @@ export function hide( preview ) {
  * @param {number} windowData.scrollTop
  * @param {number} windowData.width
  * @param {number} windowData.height
- * @param {number} pointerSize Space reserved for the pointer
+ * @param {number} pointerSpaceSize Space reserved for the pointer
  * @param {string} dir 'ltr' if left-to-right, 'rtl' if right-to-left.
  * @return {ext.popups.PreviewLayout}
  */
 export function createLayout(
-	isPreviewTall, eventData, linkData, windowData, pointerSize, dir
+	isPreviewTall, eventData, linkData, windowData, pointerSpaceSize, dir
 ) {
 	let flippedX = false,
 		flippedY = false,
@@ -377,7 +377,7 @@ export function createLayout(
 				eventData.pageY - windowData.scrollTop,
 				linkData.clientRects,
 				false
-			) + windowData.scrollTop + pointerSize :
+			) + windowData.scrollTop + pointerSpaceSize :
 			// Position according to link position or size
 			linkData.offset.top + linkData.height + pointerSize,
 		offsetLeft;
@@ -430,7 +430,7 @@ export function createLayout(
 			) + windowData.scrollTop;
 		}
 
-		offsetTop -= pointerSize;
+		offsetTop -= pointerSpaceSize;
 	}
 
 	return {
@@ -498,11 +498,11 @@ export function getClasses( preview, layout ) {
  * @param {ext.popups.PreviewLayout} layout
  * @param {string[]} classes class names used for layout out the preview
  * @param {number} predefinedLandscapeImageHeight landscape image height
- * @param {number} pointerSize
+ * @param {number} pointerSpaceSize
  * @return {void}
  */
 export function layoutPreview(
-	preview, layout, classes, predefinedLandscapeImageHeight, pointerSize
+	preview, layout, classes, predefinedLandscapeImageHeight, pointerSpaceSize
 ) {
 	const popup = preview.el,
 		isTall = preview.isTall,
@@ -517,7 +517,7 @@ export function layoutPreview(
 	) {
 		popup.find( '.mwe-popups-extract' ).css(
 			'margin-top',
-			thumbnail.height - pointerSize
+			thumbnail.height - pointerSpaceSize
 		);
 	}
 

tests/node-qunit/isEnabled.test.js

@@ -1,13 +1,13 @@
 import * as stubs from './stubs';
 import isEnabled from '../../src/isEnabled';
 
-function createStubUserSettings( isEnabled ) {
+function createStubUserSettings( expectEnabled ) {
 	return {
 		hasIsEnabled() {
-			return isEnabled !== undefined;
+			return expectEnabled !== undefined;
 		},
 		getIsEnabled() {
-			return Boolean( isEnabled );
+			return Boolean( expectEnabled );
 		}
 	};
 }