1 files changed, 65 insertions, 0 deletions
diff --git a/alpinejs/packages/alpinejs/src/clone.js b/alpinejs/packages/alpinejs/src/clone.js
new file mode 100644
index 0000000..0f37d05
--- /dev/null
+++ b/alpinejs/packages/alpinejs/src/clone.js
@@ -0,0 +1,65 @@
+import { effect, release, overrideEffect } from "./reactivity"
+import { initTree, isRoot } from "./lifecycle"
+import { walk } from "./utils/walk"
+
+let isCloning = false
+
+export function skipDuringClone(callback) {
+    return (...args) => isCloning || callback(...args)
+}
+
+export function onlyDuringClone(callback) {
+    return (...args) => isCloning && callback(...args)
+}
+
+export function skipWalkingSubClone(callback) {
+    return (...args) => isCloning || callback(...args)
+}
+
+export function interuptCrawl(callback) {
+    return (...args) => isCloning || callback(...args)
+}
+
+export function clone(oldEl, newEl) {
+    newEl._x_dataStack = oldEl._x_dataStack
+
+    isCloning = true
+
+    dontRegisterReactiveSideEffects(() => {
+        cloneTree(newEl)
+    })
+
+    isCloning = false
+}
+
+export function cloneTree(el) {
+    let hasRunThroughFirstEl = false
+
+    let shallowWalker = (el, callback) => {
+        walk(el, (el, skip) => {
+            if (hasRunThroughFirstEl && isRoot(el)) return skip()
+
+            hasRunThroughFirstEl = true
+
+            callback(el, skip)
+        })
+    }
+
+    initTree(el, shallowWalker)
+}
+
+function dontRegisterReactiveSideEffects(callback) {
+    let cache = effect
+
+    overrideEffect((callback, el) => {
+        let storedEffect = cache(callback)
+
+        release(storedEffect)
+
+        return () => {}
+    })
+
+    callback()
+
+    overrideEffect(cache)
+}