feat(ui): lint js code

ui/package.json

@@ -19,19 +19,19 @@
     "vue-router": "^3.5.2"
   },
   "devDependencies": {
-    "@vue/cli-plugin-babel": "^4.5.14",
-    "@vue/cli-plugin-eslint": "^4.5.14",
-    "@vue/cli-service": "^4.5.14",
+    "@vue/cli-plugin-babel": "^5.0.4",
+    "@vue/cli-plugin-eslint": "^5.0.4",
+    "@vue/cli-service": "^5.0.4",
     "@vue/eslint-config-standard": "^6.1.0",
     "babel-eslint": "^10.1.0",
     "eslint": "^7.28.0",
-    "eslint-plugin-import": "^2.25.2",
+    "eslint-plugin-import": "^2.25.4",
     "eslint-plugin-node": "^11.1.0",
-    "eslint-plugin-promise": "^5.1.0",
+    "eslint-plugin-promise": "^6.0.0",
     "eslint-plugin-standard": "^4.1.0",
-    "eslint-plugin-vue": "^7.19.1",
-    "express": "^4.17.1",
-    "http-proxy-middleware": "^2.0.1",
+    "eslint-plugin-vue": "^8.5.0",
+    "express": "^4.17.3",
+    "http-proxy-middleware": "^2.0.4",
     "vue-template-compiler": "^2.6.14"
   }
 }

ui/src/helpers.js

@@ -15,7 +15,7 @@
  * @param data POST data. Optional.
  */
 export function stream_ajax (path, callback, successCallback, failCallback, data) {
-  var req = new XMLHttpRequest()
+  const req = new XMLHttpRequest()
 
   console.log('Making streaming HTTP request to ' + path)
 
@@ -28,23 +28,23 @@ export function stream_ajax (path, callback, successCallback, failCallback, data
     }
   })
 
-  var buffer = ''
-  var seenBytes = 0
+  let buffer = ''
+  let seenBytes = 0
 
   req.onreadystatechange = function () {
     if (req.readyState > 2) {
       buffer += req.responseText.substr(seenBytes)
 
-      var pointer
+      let pointer
       while ((pointer = buffer.indexOf('\n')) >= 0) {
-        var line = buffer.substring(0, pointer).trim()
+        const line = buffer.substring(0, pointer).trim()
         buffer = buffer.substring(pointer + 1)
 
         if (line.length === 0) {
           continue
         }
 
-        var contents = JSON.parse(line)
+        const contents = JSON.parse(line)
         callback(contents)
       }
 
@@ -59,9 +59,9 @@ export function stream_ajax (path, callback, successCallback, failCallback, data
   req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded')
 
   if (data != null) {
-    var form = ''
+    let form = ''
 
-    for (var key in data) {
+    for (const key in data) {
       if (!data[key]) {
         continue
       }

ui/src/views/MigrateView.vue

@@ -27,7 +27,7 @@ export default {
     // See if we need to migrate yuzu to mainline
     let need_migrate = false
     for (const package_id in this.$root.metadata.database.packages) {
-      var name = this.$root.metadata.database.packages[package_id].name
+      const name = this.$root.metadata.database.packages[package_id].name
       if ((name.indexOf('Nightly') !== -1 || name.indexOf('Canary') !== -1)) {
         console.log('Migration needed (found "' + name + '", move to mainline)')
 
@@ -38,7 +38,7 @@ export default {
 
         // Migration step: enable mainline
         for (const sub_package_id in this.$root.config.packages) {
-          var name = this.$root.config.packages[sub_package_id].name
+          const name = this.$root.config.packages[sub_package_id].name
           if (name === 'yuzu') {
             this.$root.config.packages[sub_package_id].default = true
             break