1. 重新初始化

static/admin/js/change_form.js

@@ -0,0 +1,33 @@
+/*global gettext*/
+'use strict';
+{
+    const inputTags = ['BUTTON', 'INPUT', 'SELECT', 'TEXTAREA'];
+    const modelName = document.getElementById('django-admin-form-add-constants').dataset.modelName;
+    let submitted = false;
+
+    if (modelName) {
+        const form = document.getElementById(modelName + '_form');
+
+        form.addEventListener('submit', (event) => {
+            event.preventDefault();
+            if (submitted) {
+                const answer = window.confirm(gettext('You have already submitted this form. Are you sure you want to submit it again?'));
+                if (!answer) {
+                    return;
+                }
+            }
+            ;
+            event.target.submit();
+            submitted = true;
+        });
+
+        for (const element of form.elements) {
+            // HTMLElement.offsetParent returns null when the element is not
+            // rendered.
+            if (inputTags.includes(element.tagName) && !element.disabled && element.offsetParent) {
+                element.focus();
+                break;
+            }
+        }
+    }
+}