Allow 0x prefix on hex numbers

Means that users can type it as a prefix, or paste in a number with this
prefix.

diff --git a/src/Field.react.js b/src/Field.react.js
index 6c2362c8cb0658d9d425f55226091e166b1b29c1..b7b3ebda775f8d20bf2437f2664d98682d518de0 100644 (file)
--- a/src/Field.react.js
+++ b/src/Field.react.js
@@ -34,8 +34,9 @@ function fromValue(value: ?Value, base: number): string {
 }
 
 function getValidator(base) {
+  const prefix = base === 16 ? '(?:0x)?' : '';
   return new RegExp(
-    `^\\s*[${DIGITS.slice(0, base)}]*\\s*$`,
+    `^\\s*${prefix}[${DIGITS.slice(0, base)}]*\\s*$`,
     'i'
   );
 }