Style CI Checks and Fixes (#272)

.eslintignore

@@ -0,0 +1,13 @@
+core/openseadragon/*.js
+core/openseadragonzoomlevels.js
+core/openseadragonzoomlevels.BAK.js
+core/openseadragon-scalebar.js
+core/openseadragon-scalebar.BAK.js
+core/openseadragon-imaginghelper.min.js
+core/openseadragon-imaginghelper.min.BAK.js
+apps/landing/skel.min.js
+apps/landing/util.js
+apps/landing/jquery.dropotron.min.js
+apps/landing/jquery.min.js
+apps/landing/jquery.scrollex.min.js
+apps/segment/opencv.js

.eslintrc.js

@@ -0,0 +1,27 @@
+module.exports = {
+  'env': {
+    'browser': true,
+    'es6': true,
+  },
+  'extends': [
+    'google',
+  ],
+  'globals': {
+    'Atomics': 'readonly',
+    'SharedArrayBuffer': 'readonly',
+  },
+  'parserOptions': {
+    'ecmaVersion': 2018,
+  },
+  'rules': {
+    "require-jsdoc" : 0,
+    "valid-jsdoc" : 0,
+    "max-len" : ["error", { "code": 120 ,"ignoreTemplateLiterals": true},],
+    "camelcase" : 0,
+    "no-unused-vars" : 0,
+    "no-var" : 0,
+    "prefer-promise-reject-errors" :0,
+    "no-extra-bind" : 0,
+    "new-cap" : 0,
+  },
+};

.travis.yml

@@ -1,16 +1,40 @@
-sudo: required
+os: linux
+dist: xenial
 language: node_js
 node_js:
    - "12"
 install:
-    - npm ci
+    - npm install
     - npm install jsdom
     - npm install -g http-server
     - npm install -g mocha
+    - npm install eslint
+    - npm install eslint-config-google
+
+stages:
+  - name: tests
+  - name: lintjs
+  - name: linthtml
 
 before_script:
   - http-server -s & # start a Web server
   - sleep 3 # give Web server some time to bind to sockets, etc
 
-script:
-    - mocha test --recursive --exit
+jobs:
+  include:
+    - stage: tests
+      name: Unit Tests
+      script: mocha test --recursive --exit
+    - stage: lintjs
+      name: "JS Code Style Check"
+      script:
+        - ./node_modules/.bin/eslint core/*.js --quiet
+        - ./node_modules/.bin/eslint components/**/*.js --quiet
+        - ./node_modules/.bin/eslint apps/heatmap/*.js --quiet
+        - ./node_modules/.bin/eslint apps/labeling/*.js --quiet
+        - ./node_modules/.bin/eslint apps/loader/*.js --quiet
+        - ./node_modules/.bin/eslint apps/model/*.js --quiet
+        - ./node_modules/.bin/eslint apps/segment/*.js --quiet
+        - ./node_modules/.bin/eslint apps/model/**/*.js --quiet
+        - ./node_modules/.bin/eslint apps/segment/**/*.js --quiet
+        - ./node_modules/.bin/eslint apps/viewer/*.js --quiet