Adding json filter function

Signed-off-by: Dave Henderson <dhenderson@gmail.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/README.md b/README.md
index 6bb1a508..1b73a8b6 100644
--- a/README.md
+++ b/README.md
@@ -73,6 +73,23 @@ $ FOO=true gomplate < input.tmpl
 foo
 ```
 
+#### `json`
+
+Converts a JSON string into an object. Only works for JSON Objects. This can be used to access properties of JSON objects.
+
+##### Example
+
+_`input.tmpl`:_
+```
+Hello {{ (getenv "FOO" | json).hello }}
+```
+
+```console
+$ export FOO='{"hello":"world"}'
+$ gomplate < input.tmpl
+Hello world
+```
+
 ### Some more complex examples
 
 ##### Variable assignment and `if`/`else`