diff --git a/docs/reference/elements/py-repl.md b/docs/reference/elements/py-repl.md
index 244211e5..32d95021 100644
--- a/docs/reference/elements/py-repl.md
+++ b/docs/reference/elements/py-repl.md
@@ -4,12 +4,13 @@ The `<py-repl>` element provides a REPL(Read Eval Print Loop) to evaluate multi-
 
 ## Attributes
 
-| attribute         | type    | default | description                           |
-|-------------------|---------|---------|---------------------------------------|
+| attribute         | type    | default | description                          |
+|-------------------|---------|---------|--------------------------------------|
 | **auto-generate** | boolean |         | Auto-generates REPL after evaluation |
 | **output-mode**   | string  | ""      | Determines whether the output element is cleared prior to writing output |
-| **output**        | string  |         | The id of the element to write `stdout` and `stderr` to      |
+| **output**        | string  |         | The id of the element to write `stdout` and `stderr` to     |
 | **stderr**        | string  |         | The id of the element to write `stderr` to |
+| **src**           | string  |         | Resource to be preloaded into the REPL |
 
 
 ### `auto-generate`
@@ -24,6 +25,9 @@ The ID of an element in the DOM that `stdout` (e.g. `print()`), `stderr`, and th
 ### `stderr`
 The ID of an element in the DOM that `stderr` will be written to. Defaults to None, though writes to `stderr` will still appear in the location specified by `output`.
 
+### `src`
+If a \<py-repl\> tag has the `src` attribute, during page initialization, resource in the `src` will be preloaded into the REPL. Please note that this will not run in advance. If there is content in the \<py-repl\> tag, it will be cleared and replaced with preloaded resource.
+
 ## Examples
 
 ### `<py-repl>` element set to auto-generate
@@ -46,3 +50,13 @@ The following will write "Hello! World!" to the div with id `replOutput`.
 ```
 
 Note that if we `print` from the REPL (or otherwise write to `sys.stdout`), the output will be printed in the [`py-terminal`](../plugins/py-terminal.md) if is enabled.
+
+### `<py-repl>` element with src
+Preload resource from src into the REPL
+```html
+<py-repl id="py-repl" output="replOutput" src="./src/py/py_code.py">
+    If a py-repl tag has the src attribute,
+    the content here will be cleared and replaced.
+</py-repl>
+<div id="replOutput"></div>
+```