1 files changed, 43 insertions, 0 deletions
diff --git a/alpinejs/packages/alpinejs/src/directives/x-if.js b/alpinejs/packages/alpinejs/src/directives/x-if.js
new file mode 100644
index 0000000..8cbb030
--- /dev/null
+++ b/alpinejs/packages/alpinejs/src/directives/x-if.js
@@ -0,0 +1,43 @@
+import { evaluateLater } from '../evaluator'
+import { addScopeToNode } from '../scope'
+import { directive } from '../directives'
+import { initTree } from '../lifecycle'
+import { mutateDom } from '../mutation'
+
+directive('if', (el, { expression }, { effect, cleanup }) => {
+    let evaluate = evaluateLater(el, expression)
+
+    let show = () => {
+        if (el._x_currentIfEl) return el._x_currentIfEl
+
+        let clone = el.content.cloneNode(true).firstElementChild
+
+        addScopeToNode(clone, {}, el)
+
+        mutateDom(() => {
+            el.after(clone)
+
+            initTree(clone)
+        })
+
+        el._x_currentIfEl = clone
+
+        el._x_undoIf = () => { clone.remove(); delete el._x_currentIfEl }
+
+        return clone
+    }
+
+    let hide = () => {
+        if (! el._x_undoIf) return
+
+        el._x_undoIf()
+
+        delete el._x_undoIf
+    }
+
+    effect(() => evaluate(value => {
+        value ? show() : hide()
+    }))
+
+    cleanup(() => el._x_undoIf && el._x_undoIf())
+})