From fe623a29dbb8b2b8429fccd102301745f973f40a Mon Sep 17 00:00:00 2001
From: Greg Hurrell <greg@hurrell.net>
Date: Fri, 31 Jul 2015 20:00:15 -0700
Subject: [PATCH] Allow user to fully clear input field

---
 src/App.js         | 2 +-
 src/Field.react.js | 8 +++++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/App.js b/src/App.js
index 41aedb5..87ca53f 100644
--- a/src/App.js
+++ b/src/App.js
@@ -14,7 +14,7 @@ export default class App extends React.Component {
   constructor(props) {
     super(props);
     this.state = {
-      value: '0',
+      value: null,
     };
   }
 
diff --git a/src/Field.react.js b/src/Field.react.js
index 6bc42c2..4dab605 100644
--- a/src/Field.react.js
+++ b/src/Field.react.js
@@ -16,6 +16,9 @@ const DIGITS = '0123456789abcdef';
  * Convert from canonical (hexadecimal) value to `base`.
  */
 function fromValue(value: string, base: number): string {
+  if (value === null) {
+    return '';
+  }
   if (base === 16) {
     return value;
   }
@@ -25,7 +28,10 @@ function fromValue(value: string, base: number): string {
 /**
  * Convert from `base` value to canonical (hexadecimal) value.
  */
-function toValue(value: string, base: number): string {
+function toValue(value: string, base: number): ?string {
+  if (value === '') {
+    return null;
+  }
   if (base === 16) {
     return value;
   }
-- 
2.37.1