diff --git a/static/js/confirm_dialog.js b/static/js/confirm_dialog.js
index 45409f72de..c988c06d3e 100644
--- a/static/js/confirm_dialog.js
+++ b/static/js/confirm_dialog.js
@@ -34,6 +34,9 @@ import * as settings_data from "./settings_data";
            This will show a loading spinner when the yes button is clicked.
            The caller is responsible for calling hide_dialog_spinner()
            to hide the spinner in both success and error handlers.
+
+        7) If a caller needs to run code after the modal body is added
+           to DOM, it can do so by passing a post_render hook.
 */
 
 export function hide_dialog_spinner() {
@@ -98,6 +101,10 @@ export function launch(conf) {
 
     submit_button_span.html(conf.html_submit_button);
 
+    if (conf.post_render !== undefined) {
+        conf.post_render();
+    }
+
     const submit_button = dialog.find(".dialog_submit_button");
     // Set up handlers.
     submit_button.on("click", () => {