diff --git a/src/index.js b/src/index.js
index 045a56c..b80f932 100644
--- a/src/index.js
+++ b/src/index.js
@@ -3,7 +3,7 @@ export default {
     {
       name: 'mfm',
       level: 'inline',
-      start(src) { return src.match(/\$\[/)?.index },
+      start (src) { return src.match(/\$\[/)?.index },
       tokenizer (src, tokens) {
         const rule = /^\$\[(?<markup>[\w\d]+)(?:\.(?<options>\S+))? (?<text>.+)\]$/
         const match = rule.exec(src)
@@ -14,7 +14,7 @@ export default {
             markup: match.groups.markup,
             options: match.groups.options,
             text: match.groups.text,
-            tokens: []
+            tokens: [],
           }
           this.lexer.inline(token.text, token.tokens)
           return token
@@ -28,33 +28,29 @@ export default {
             return i
           }, {})
         }
-        const el = (mfmClass, mfmStyle = "") => `<span style="display: inline-block;${mfmStyle}" class="${mfmClass}">${this.parser.parseInline(token.tokens)}</span>`
+        const el = (mfmClass, mfmStyle = '') => `<span style="display: inline-block;${mfmStyle}" class="${mfmClass}">${this.parser.parseInline(token.tokens)}</span>`
         switch (token.markup) {
-        case 'x2': {
-          return el('x2')
-          break
-        }
-        case 'twitch': {
-          const speed = options.speed || '0.5s'
-          return el('twitch', ` animation: mfm-twitch ${speed} ease infinite;`)
-          break
-        }
-        case 'sparkle': {
-          return el('sparkle')
-          break
-        }
-        case 'spin': {
-          const direction = options.left ? 'reverse' : options.alternate ? 'alternate' : 'normal'
-          const anime = options.x ? 'mfm-spinX' : options.y ? 'mfm-spinY' : 'mfm-spin'
-          const speed = options.speed || '1.5s'
-          return el('spin', ` animation: ${anime} ${speed} linear infinite; animation-direction: ${direction};`)
-          break
-        }
-        default: {
-          return `$[${token.markup} ${this.parser.parseInline(token.tokens)}]`
-        }
+          case 'x2': {
+            return el('x2')
+          }
+          case 'twitch': {
+            const speed = options.speed || '0.5s'
+            return el('twitch', ` animation: mfm-twitch ${speed} ease infinite;`)
+          }
+          case 'sparkle': {
+            return el('sparkle')
+          }
+          case 'spin': {
+            const direction = options.left ? 'reverse' : options.alternate ? 'alternate' : 'normal'
+            const anime = options.x ? 'mfm-spinX' : options.y ? 'mfm-spinY' : 'mfm-spin'
+            const speed = options.speed || '1.5s'
+            return el('spin', ` animation: ${anime} ${speed} linear infinite; animation-direction: ${direction};`)
+          }
+          default: {
+            return `$[${token.markup} ${this.parser.parseInline(token.tokens)}]`
+          }
         }
       },
     },
-  ]
+  ],
 }