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README: clarify DEBUG_ envvar parsing #788

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README: clarify DEBUG_ envvar parsing #788

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10 changes: 8 additions & 2 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -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.
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