From 1a3dfdad3d8a232de34440eaf3049777c92ceb1c Mon Sep 17 00:00:00 2001
From: Wout Mertens <Wout.Mertens@gmail.com>
Date: Tue, 13 Oct 2020 10:38:27 +0200
Subject: [PATCH] README: clarify DEBUG_ envvar parsing

---
 README.md | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 88dae35d..47aa2eab 100644
--- a/README.md
+++ b/README.md
@@ -171,9 +171,15 @@ change the behavior of the debug logging:
 | `DEBUG_DEPTH` | Object inspection depth.                    |
 | `DEBUG_SHOW_HIDDEN` | Shows hidden properties on inspected objects. |
 
-
-__Note:__ The environment variables beginning with `DEBUG_` end up being
+__Note:__ Any environment variables beginning with `DEBUG_` end up being
 converted into an Options object that gets used with `%o`/`%O` formatters.
+
+To set these variables, you can use the following string values:
+- one of "yes", "on", "true", "enabled": `true`
+- one of "no", "off", "false", "disabled": `false`
+- "null": `null`
+- anything else is parsed as a number
+
 See the Node.js documentation for
 [`util.inspect()`](https://nodejs.org/api/util.html#util_util_inspect_object_options)
 for the complete list.