Merge pull request #2150 from adumesny/master

vue doc tweaks

Author: adumesny

demo/vue3js.html

@@ -35,7 +35,7 @@ <h1>How to integrate GridStack.js with Vue.js</h1>
         setup() {
           let count = ref(0);
           let info = ref("");
-          let grid = null; // DO NOT use ref(NULL) as proxies GS will break all logic when comparing structures... see https://github.com/gridstack/gridstack.js/issues/2115
+          let grid = null; // DO NOT use ref(null) as proxies GS will break all logic when comparing structures... see https://github.com/gridstack/gridstack.js/issues/2115
           const items = [
             { x: 2, y: 1, h: 2 },
             { x: 2, y: 4, w: 3 },

demo/vue3js_v-for.html

@@ -56,7 +56,7 @@ <h1>How to integrate GridStack.js with Vue.js</h1>
           let gridFloat = ref(false);
           let color = ref("black");
           let gridInfo = ref("");
-          let grid = null; // DO NOT use ref(NULL) as proxies GS will break all logic when comparing structures... see https://github.com/gridstack/gridstack.js/issues/2115
+          let grid = null; // DO NOT use ref(null) as proxies GS will break all logic when comparing structures... see https://github.com/gridstack/gridstack.js/issues/2115
           let items = ref([]);
 
           onMounted(() => {