Refactor up/down key handlers with simple ternary

Author: i-like-robots

lib/ReactTags.js

@@ -51,22 +51,16 @@ function pressUpKey (e) {
   e.preventDefault()
 
   // if first item, cycle to the bottom
-  if (this.state.index <= 0) {
-    this.setState({ index: this.state.options.length - 1 })
-  } else {
-    this.setState({ index: this.state.index - 1 })
-  }
+  const size = this.state.options.length - 1
+  this.setState({ index: this.state.index <= 0 ? size : this.state.index - 1 })
 }
 
 function pressDownKey (e) {
   e.preventDefault()
 
   // if last item, cycle to top
-  if (this.state.index >= this.state.options.length - 1) {
-    this.setState({ index: 0 })
-  } else {
-    this.setState({ index: this.state.index + 1 })
-  }
+  const size = this.state.options.length - 1
+  this.setState({ index: this.state.index >= size ? 0 : this.state.index + 1 })
 }
 
 function pressBackspaceKey () {