From e4dcb8f85e226161f466c50b003c875dee5263ca Mon Sep 17 00:00:00 2001
From: Nick Fitzgerald <fitzgen@gmail.com>
Date: Fri, 8 Jun 2018 14:22:18 -0700
Subject: [PATCH] Add associated constants for common JS values

---
 src/lib.rs | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index 055e7e3b..5905adc9 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -67,6 +67,18 @@ const JSIDX_FALSE: u32 = 6;
 const JSIDX_RESERVED: u32 = 8;
 
 impl JsValue {
+    /// The `null` JS value constant.
+    pub const NULL: JsValue = JsValue { idx:  JSIDX_NULL };
+
+    /// The `undefined` JS value constant.
+    pub const UNDEFINED: JsValue = JsValue { idx:  JSIDX_UNDEFINED };
+
+    /// The `true` JS value constant.
+    pub const TRUE: JsValue = JsValue { idx:  JSIDX_TRUE };
+
+    /// The `false` JS value constant.
+    pub const FALSE: JsValue = JsValue { idx:  JSIDX_FALSE };
+
     /// Creates a new JS value which is a string.
     ///
     /// The utf-8 string provided is copied to the JS heap and the string will