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node_modules/vue-hot-reload-api/dist/index.js

@@ -167,10 +167,16 @@ exports.rerender = tryWrap(function (id, options) {
       if (Array.isArray(instance.$options.cached)) {
         instance.$options.cached = []
       }
+
       // post 2.5.4: v-once trees are cached on instance._staticTrees.
       // Pure static trees are cached on the staticRenderFns array
       // (both already reset above)
+
+      // 2.6: temporarily mark rendered scoped slots as unstable so that
+      // child components can be forced to update
+      var restore = patchScopedSlots(instance)
       instance.$forceUpdate()
+      instance.$nextTick(restore)
     })
   } else {
     // functional or no instance created yet
@@ -241,3 +247,25 @@ exports.reload = tryWrap(function (id, options) {
     }
   })
 })
+
+// 2.6 optimizes template-compiled scoped slots and skips updates if child
+// only uses scoped slots. We need to patch the scoped slots resolving helper
+// to temporarily mark all scoped slots as unstable in order to force child
+// updates.
+function patchScopedSlots (instance) {
+  if (!instance._u) { return }
+  // https://github.com/vuejs/vue/blob/dev/src/core/instance/render-helpers/resolve-scoped-slots.js
+  var original = instance._u
+  instance._u = function (slots) {
+    try {
+      // 2.6.4 ~ 2.6.6
+      return original(slots, true)
+    } catch (e) {
+      // 2.5 / >= 2.6.7
+      return original(slots, null, true)
+    }
+  }
+  return function () {
+    instance._u = original
+  }
+}