Add prettier + eslint

.circleci/config.yml

@@ -2,7 +2,7 @@ version: 2
 jobs:
   test:
     docker:
-      - image: circleci/node:4-browsers
+      - image: circleci/node:8-browsers
     steps:
       - checkout
       - run: npm config set "//registry.npmjs.org/:_authToken" $NPM_AUTH
@@ -18,7 +18,7 @@ jobs:
           path: junit-reports
   publish:
     docker:
-      - image: circleci/node:4-browsers
+      - image: circleci/node:8-browsers
     steps:
       - checkout
       - attach_workspace: { at: . }

.eslintrc

@@ -1,3 +1,3 @@
 {
-  "extends": "@segment/eslint-config/browser/legacy"
+  "extends": ["@segment/eslint-config/browser/legacy", "prettier"]
 }

.prettierrc

@@ -0,0 +1,3 @@
+{
+  "singleQuote": true
+}

Makefile

@@ -2,7 +2,6 @@
 # Binaries
 ##
 
-ESLINT := node_modules/.bin/eslint
 KARMA := node_modules/.bin/karma
 
 ##
@@ -58,12 +57,13 @@ distclean: clean
 
 # Lint JavaScript source files.
 lint: install
-	@$(ESLINT) $(ALL_FILES)
+	yarn lint
+
 .PHONY: lint
 
 # Attempt to fix linting errors.
 fmt: install
-	@$(ESLINT) --fix $(ALL_FILES)
+	yarn format
 .PHONY: fmt
 
 # Run browser unit tests in a browser.

lib/analytics.js

@@ -102,7 +102,10 @@ Analytics.prototype.addIntegration = function(Integration) {
  * @return {Analytics}
  */
 
-Analytics.prototype.init = Analytics.prototype.initialize = function(settings, options) {
+Analytics.prototype.init = Analytics.prototype.initialize = function(
+  settings,
+  options
+) {
   settings = settings || {};
   options = options || {};
 
@@ -121,8 +124,8 @@ Analytics.prototype.init = Analytics.prototype.initialize = function(settings, o
     // Don't load disabled integrations
     if (options.integrations) {
       if (
-        options.integrations[name] === false
-        || options.integrations.All === false && !options.integrations[name]
+        options.integrations[name] === false ||
+        (options.integrations.All === false && !options.integrations[name])
       ) {
         return;
       }
@@ -158,7 +161,10 @@ Analytics.prototype.init = Analytics.prototype.initialize = function(settings, o
   // create a list of any integrations that did not initialize - this will be passed with all events for replay support:
   this.failedInitializations = [];
   each(function(integration) {
-    if (options.initialPageview && integration.options.initialPageview === false) {
+    if (
+      options.initialPageview &&
+      integration.options.initialPageview === false
+    ) {
       integration.page = after(2, integration.page);
     }
 
@@ -226,9 +232,9 @@ Analytics.prototype.add = function(integration) {
 Analytics.prototype.identify = function(id, traits, options, fn) {
   // Argument reshuffling.
   /* eslint-disable no-unused-expressions, no-sequences */
-  if (is.fn(options)) fn = options, options = null;
-  if (is.fn(traits)) fn = traits, options = null, traits = null;
-  if (is.object(id)) options = traits, traits = id, id = user.id();
+  if (is.fn(options)) (fn = options), (options = null);
+  if (is.fn(traits)) (fn = traits), (options = null), (traits = null);
+  if (is.object(id)) (options = traits), (traits = id), (id = user.id());
   /* eslint-enable no-unused-expressions, no-sequences */
 
   // clone traits before we manipulate so we don't do anything uncouth, and take
@@ -278,12 +284,11 @@ Analytics.prototype.user = function() {
 Analytics.prototype.group = function(id, traits, options, fn) {
   /* eslint-disable no-unused-expressions, no-sequences */
   if (!arguments.length) return group;
-  if (is.fn(options)) fn = options, options = null;
-  if (is.fn(traits)) fn = traits, options = null, traits = null;
-  if (is.object(id)) options = traits, traits = id, id = group.id();
+  if (is.fn(options)) (fn = options), (options = null);
+  if (is.fn(traits)) (fn = traits), (options = null), (traits = null);
+  if (is.object(id)) (options = traits), (traits = id), (id = group.id());
   /* eslint-enable no-unused-expressions, no-sequences */
 
-
   // grab from group again to make sure we're taking from the source
   group.identify(id, traits);
 
@@ -318,8 +323,9 @@ Analytics.prototype.group = function(id, traits, options, fn) {
 Analytics.prototype.track = function(event, properties, options, fn) {
   // Argument reshuffling.
   /* eslint-disable no-unused-expressions, no-sequences */
-  if (is.fn(options)) fn = options, options = null;
-  if (is.fn(properties)) fn = properties, options = null, properties = null;
+  if (is.fn(options)) (fn = options), (options = null);
+  if (is.fn(properties))
+    (fn = properties), (options = null), (properties = null);
   /* eslint-enable no-unused-expressions, no-sequences */
 
   // figure out if the event is archived.
@@ -353,7 +359,10 @@ Analytics.prototype.track = function(event, properties, options, fn) {
   }
 
   // Add the initialize integrations so the server-side ones can be disabled too
-  defaults(msg.integrations, this._mergeInitializeAndPlanIntegrations(planIntegrationOptions));
+  defaults(
+    msg.integrations,
+    this._mergeInitializeAndPlanIntegrations(planIntegrationOptions)
+  );
 
   this._invoke('track', new Track(msg));
 
@@ -374,7 +383,11 @@ Analytics.prototype.track = function(event, properties, options, fn) {
  * @return {Analytics}
  */
 
-Analytics.prototype.trackClick = Analytics.prototype.trackLink = function(links, event, properties) {
+Analytics.prototype.trackClick = Analytics.prototype.trackLink = function(
+  links,
+  event,
+  properties
+) {
   if (!links) return this;
   // always arrays, handles jquery
   if (type(links) === 'element') links = [links];
@@ -387,9 +400,10 @@ Analytics.prototype.trackClick = Analytics.prototype.trackLink = function(links,
     on(el, 'click', function(e) {
       var ev = is.fn(event) ? event(el) : event;
       var props = is.fn(properties) ? properties(el) : properties;
-      var href = el.getAttribute('href')
-        || el.getAttributeNS('http://www.w3.org/1999/xlink', 'href')
-        || el.getAttribute('xlink:href');
+      var href =
+        el.getAttribute('href') ||
+        el.getAttributeNS('http://www.w3.org/1999/xlink', 'href') ||
+        el.getAttribute('xlink:href');
 
       self.track(ev, props);
 
@@ -417,14 +431,19 @@ Analytics.prototype.trackClick = Analytics.prototype.trackLink = function(links,
  * @return {Analytics}
  */
 
-Analytics.prototype.trackSubmit = Analytics.prototype.trackForm = function(forms, event, properties) {
+Analytics.prototype.trackSubmit = Analytics.prototype.trackForm = function(
+  forms,
+  event,
+  properties
+) {
   if (!forms) return this;
   // always arrays, handles jquery
   if (type(forms) === 'element') forms = [forms];
 
   var self = this;
   each(function(el) {
-    if (type(el) !== 'element') throw new TypeError('Must pass HTMLElement to `analytics.trackForm`.');
+    if (type(el) !== 'element')
+      throw new TypeError('Must pass HTMLElement to `analytics.trackForm`.');
     function handler(e) {
       prevent(e);
 
@@ -465,12 +484,15 @@ Analytics.prototype.trackSubmit = Analytics.prototype.trackForm = function(forms
 Analytics.prototype.page = function(category, name, properties, options, fn) {
   // Argument reshuffling.
   /* eslint-disable no-unused-expressions, no-sequences */
-  if (is.fn(options)) fn = options, options = null;
-  if (is.fn(properties)) fn = properties, options = properties = null;
-  if (is.fn(name)) fn = name, options = properties = name = null;
-  if (type(category) === 'object') options = name, properties = category, name = category = null;
-  if (type(name) === 'object') options = properties, properties = name, name = null;
-  if (type(category) === 'string' && type(name) !== 'string') name = category, category = null;
+  if (is.fn(options)) (fn = options), (options = null);
+  if (is.fn(properties)) (fn = properties), (options = properties = null);
+  if (is.fn(name)) (fn = name), (options = properties = name = null);
+  if (type(category) === 'object')
+    (options = name), (properties = category), (name = category = null);
+  if (type(name) === 'object')
+    (options = properties), (properties = name), (name = null);
+  if (type(category) === 'string' && type(name) !== 'string')
+    (name = category), (category = null);
   /* eslint-enable no-unused-expressions, no-sequences */
 
   properties = clone(properties) || {};
@@ -539,9 +561,9 @@ Analytics.prototype.pageview = function(url) {
 Analytics.prototype.alias = function(to, from, options, fn) {
   // Argument reshuffling.
   /* eslint-disable no-unused-expressions, no-sequences */
-  if (is.fn(options)) fn = options, options = null;
-  if (is.fn(from)) fn = from, options = null, from = null;
-  if (is.object(from)) options = from, from = null;
+  if (is.fn(options)) (fn = options), (options = null);
+  if (is.fn(from)) (fn = from), (options = null), (from = null);
+  if (is.object(from)) (options = from), (from = null);
   /* eslint-enable no-unused-expressions, no-sequences */
 
   var msg = this.normalize({
@@ -660,7 +682,11 @@ Analytics.prototype._invoke = function(method, facade) {
     // Check if an integration failed to initialize.
     // If so, do not process the message as the integration is in an unstable state.
     if (failedInitializations.indexOf(name) >= 0) {
-      self.log('Skipping invokation of .%s method of %s integration. Integation failed to initialize properly.', method, name);
+      self.log(
+        'Skipping invokation of .%s method of %s integration. Integation failed to initialize properly.',
+        method,
+        name
+      );
     } else {
       try {
         metrics.increment('analytics_js.integration.invoke', {
@@ -673,7 +699,12 @@ Analytics.prototype._invoke = function(method, facade) {
           method: method,
           integration_name: integration.name
         });
-        self.log('Error invoking .%s method of %s integration: %o', method, name, e);
+        self.log(
+          'Error invoking .%s method of %s integration: %o',
+          method,
+          name,
+          e
+        );
       }
     }
   }, this._integrations);
@@ -738,13 +769,17 @@ Analytics.prototype._parseQuery = function(query) {
   function pickPrefix(prefix, object) {
     var length = prefix.length;
     var sub;
-    return foldl(function(acc, val, key) {
-      if (key.substr(0, length) === prefix) {
-        sub = key.substr(length);
-        acc[sub] = val;
-      }
-      return acc;
-    }, {}, object);
+    return foldl(
+      function(acc, val, key) {
+        if (key.substr(0, length) === prefix) {
+          sub = key.substr(length);
+          acc[sub] = val;
+        }
+        return acc;
+      },
+      {},
+      object
+    );
   }
 };
 
@@ -772,7 +807,9 @@ Analytics.prototype.normalize = function(msg) {
  * @param  {Object} planIntegrations Tracking plan integrations.
  * @return {Object}                  The merged integrations.
  */
-Analytics.prototype._mergeInitializeAndPlanIntegrations = function(planIntegrations) {
+Analytics.prototype._mergeInitializeAndPlanIntegrations = function(
+  planIntegrations
+) {
   // Do nothing if there are no initialization integrations
   if (!this.options.integrations) {
     return planIntegrations;

lib/cookie.js

@@ -22,7 +22,6 @@ function Cookie(options) {
   this.options(options);
 }
 
-
 /**
  * Get or set the cookie options.
  *
@@ -63,7 +62,6 @@ Cookie.prototype.options = function(options) {
   this.remove('ajs:test');
 };
 
-
 /**
  * Set a `key` and `value` in our cookie.
  *
@@ -82,7 +80,6 @@ Cookie.prototype.set = function(key, value) {
   }
 };
 
-
 /**
  * Get a value from our cookie by `key`.
  *
@@ -100,7 +97,6 @@ Cookie.prototype.get = function(key) {
   }
 };
 
-
 /**
  * Remove a value from our cookie by `key`.
  *
@@ -117,14 +113,12 @@ Cookie.prototype.remove = function(key) {
   }
 };
 
-
 /**
  * Expose the cookie singleton.
  */
 
 module.exports = bindAll(new Cookie());
 
-
 /**
  * Expose the `Cookie` constructor.
  */