Fixed Responsive Sizes issues - 414px is not really 414 because of scrollbars.

layouts/index.hbs

@@ -16,7 +16,10 @@
     previewFrameUrl: '{{ previewFrameUrl }}',
   };
 </script>
+
+<div class="preview">
   <iframe id="preview_frame" src="{{ previewFrameUrl }}" class="breakpoint"></iframe>
+</div>
 
 <script src="/scripts/dist/index.min.js"></script>
 </body>

layouts/partials/scripts.hbs

@@ -1,3 +1,4 @@
+<script src="/scripts/frame-index.js"></script>
 <script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
 <script src="https://unpkg.com/swiper@8/swiper-bundle.min.js"></script>{{#if config.jsUrl }}
 {{#each config.jsUrl }}<script src="{{ this }}"></script>

layouts/scripts/dist/index.min.js

@@ -9486,8 +9486,7 @@ function Responsive(props = {}) {
   function updateController() {
     let frameBreakpoint = breakpoint;
     if (typeof frameBreakpoint !== 'string') {
-      const browserGap = 17; // Scrollbars + Borders
+      frameBreakpoint = frameBreakpoint + 'px';
-      frameBreakpoint = frameBreakpoint + browserGap + 'px';
     }
     previewFrame.style.setProperty('--breakpoint', frameBreakpoint);
     previewFrame.classList.add('has-breakpoint');
@@ -9687,10 +9686,10 @@ const PreviewButtonStyle = qe.button`
 `;
 const PreviewStyle = qe.div`
   position: fixed;
-  top: 3rem;
+  top: calc(var(--top_panel_height) - 2px);
   bottom: 0;
   left: 0;
-  right: 0;
+  right: 14px; // Scrollbars
 
   background-color: rgba(0, 0, 0, 0.1);
   display: flex;
@@ -9857,7 +9856,8 @@ function DesignPreview({
     if (!previewOption) {
       return 0;
     }
-    return window.innerWidth / 2 - previewOption.widthDimension / 2;
+    const scrollbarOffset = 7;
+    return window.innerWidth / 2 - previewOption.widthDimension / 2 - scrollbarOffset;
   }
   function responsiveModeChangesHandler(e) {
     if (e.data !== 'responsiveUpdate') {
@@ -10000,10 +10000,19 @@ function setupDataOptions(rootAttributes) {
   root.render(html);
 }
 
+const previewFrame = document.getElementById('preview_frame');
 const rootAttributes = {
-  previewFrame: document.getElementById('preview_frame')
+  previewFrame
 };
 setupResponsiveness(rootAttributes);
 setupDataOptions(rootAttributes);
 setupPublish(rootAttributes);
+window.addEventListener('message', function (e) {
+  const RESIZE_CODE = 'resize:';
+  if (typeof e.data !== 'string' || !e.data.startsWith(RESIZE_CODE)) {
+    return;
+  }
+  const data = JSON.parse(e.data.substring(RESIZE_CODE.length));
+  previewFrame.style.height = data.height + 'px';
+});
 //# sourceMappingURL=index.min.js.map

layouts/scripts/frame-index.js

@@ -0,0 +1,16 @@
+'use strict';
+
+setupResizeListener();
+
+///
+
+function setupResizeListener() {
+  const RESIZE_CODE = 'resize:';
+
+  const resizeObserver = new ResizeObserver(entries => {
+    const height = document.body.offsetHeight;
+    window.parent.postMessage(RESIZE_CODE + JSON.stringify({height}), '*');
+  })
+
+  resizeObserver.observe(document.body);
+}

layouts/scripts/index.js

@@ -4,10 +4,21 @@ import {setupResponsiveness} from './toolbar/responsive.jsx';
 import {setupPublish} from "./toolbar/publish.jsx";
 import {setupDataOptions} from "./toolbar/data-options/DataOptions.jsx";
 
+const previewFrame = document.getElementById('preview_frame');
 const rootAttributes = {
-  previewFrame: document.getElementById('preview_frame'),
+  previewFrame,
 }
 
 setupResponsiveness(rootAttributes);
 setupDataOptions(rootAttributes);
 setupPublish(rootAttributes)
+
+window.addEventListener('message', function (e) {
+  const RESIZE_CODE = 'resize:';
+  if (typeof e.data !== 'string' || !e.data.startsWith(RESIZE_CODE)) {
+    return;
+  }
+
+  const data = JSON.parse(e.data.substring(RESIZE_CODE.length))
+  previewFrame.style.height = data.height + 'px';
+});

layouts/scripts/toolbar/data-options/DesignPreview.jsx

@@ -130,7 +130,8 @@ export function DesignPreview({previewOption = {widthDimension: 0}}) {
       return 0;
     }
 
-    return window.innerWidth / 2 - previewOption.widthDimension / 2;
+    const scrollbarOffset = 7;
+    return window.innerWidth / 2 - previewOption.widthDimension / 2 - scrollbarOffset;
   }
 
   function responsiveModeChangesHandler(e) {

layouts/scripts/toolbar/data-options/design-preview.style.js

@@ -30,10 +30,10 @@ export const PreviewButtonStyle = styled.button`
 
 export const PreviewStyle = styled.div`
   position: fixed;
-  top: 3rem;
+  top: calc(var(--top_panel_height) - 2px);
   bottom: 0;
   left: 0;
-  right: 0;
+  right: 14px; // Scrollbars
 
   background-color: rgba(0, 0, 0, 0.1);
   display: flex;

layouts/scripts/toolbar/responsive.jsx

@@ -65,8 +65,7 @@ function Responsive(props = {}) {
   function updateController() {
     let frameBreakpoint = breakpoint;
     if (typeof frameBreakpoint !== 'string') {
-      const browserGap = 17; // Scrollbars + Borders
+      frameBreakpoint = frameBreakpoint + 'px';
-      frameBreakpoint = (frameBreakpoint + browserGap) + 'px';
     }
 
     previewFrame.style.setProperty('--breakpoint', frameBreakpoint);

layouts/styles/_page--breakpoints.scss → layouts/styles/_page--preview.scss

@@ -1,3 +1,9 @@
+.preview {
+  overflow-y: scroll;
+  height: calc(100% - var(--top_panel_height));
+  position: relative;
+}
+
 #preview_frame {
   display: block;
   margin-right: auto;
@@ -7,10 +13,11 @@
   --breakpoint_top_spacing: 30px;
 
   margin-top: var(--top_spacing);
-  height: calc(100% - var(--top_panel_height) - var(--top_spacing));
+  height: 100%;
   background-color: white;
 
-  border: 1px solid #E2E8F0;
+  border: 0;
+  outline: 1px solid #E2E8F0;
 
   transition: max-width .3s ease-in-out, width .3s ease-in-out, margin-top .3s ease-in-out;
 
@@ -19,7 +26,6 @@
 
     width: 100%;
     max-width: var(--breakpoint);
-    box-sizing: border-box;
   }
 
 }

layouts/styles/page--main.css

@@ -56,6 +56,8 @@ body {
   display: flex;
   justify-content: space-between;
   align-items: center;
+  position: relative;
+  z-index: 1;
 }
 .page_toolbar__middle {
   display: flex;
@@ -104,6 +106,12 @@ body {
   justify-content: flex-end;
 }
 
+.preview {
+  overflow-y: scroll;
+  height: calc(100% - var(--top_panel_height));
+  position: relative;
+}
+
 #preview_frame {
   display: block;
   margin-right: auto;
@@ -111,16 +119,16 @@ body {
   --top_spacing: 0px;
   --breakpoint_top_spacing: 30px;
   margin-top: var(--top_spacing);
-  height: calc(100% - var(--top_panel_height) - var(--top_spacing));
+  height: 100%;
   background-color: white;
-  border: 1px solid #E2E8F0;
+  border: 0;
+  outline: 1px solid #E2E8F0;
   transition: max-width 0.3s ease-in-out, width 0.3s ease-in-out, margin-top 0.3s ease-in-out;
 }
 #preview_frame.has-breakpoint {
   --breakpoint: 100%;
   width: 100%;
   max-width: var(--breakpoint);
-  box-sizing: border-box;
 }
 
 .open_in_new_tab {

layouts/styles/page--main.css.map

@@ -1 +1 @@
-{"version":3,"sourceRoot":"","sources":["page--main.scss","_buttons.scss","_overlay.scss","_page--breakpoints.scss"],"names":[],"mappings":"AAAA;EACE;EACA;;;AAGF;EACE;EACA;EAEA;;;ACTF;EACE;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;;AAEA;EACE;EACA;;AAGF;EACE;EACA;;;ACtBJ;EACE;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;;;AFIF;EACE;EACA;EAEA;EACA;EACA;EAEA;EACA;EACA;;AAEA;EACE;EACA;EACA;EACA;;AAEA;EACE;;AAEA;EAHF;IAII;;;AAGF;EACE;EACA;EACA;EACA;EACA;EACA;EACA;;AAGF;EACE;EACA;EACA;EACA;EACA;EACA;EACA;;AAKF;EADF;IAEI;;;AAKN;EAEE;EACA;EACA;EACA;;AAGF;EACE;;;AG7EJ;EACE;EACA;EACA;EAEA;EACA;EAEA;EACA;EACA;EAEA;EAEA;;AAEA;EACE;EAEA;EACA;EACA;;;AH+DJ;EACE;EACA;EACA;EAEA;EACA;EACA;EACA;EACA;EAEA;EACA;EACA;EACA;EACA;EACA;EACA;EACA","file":"page--main.css"}
+{"version":3,"sourceRoot":"","sources":["page--main.scss","_buttons.scss","_overlay.scss","_page--preview.scss"],"names":[],"mappings":"AAAA;EACE;EACA;;;AAGF;EACE;EACA;EAEA;;;ACTF;EACE;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;;AAEA;EACE;EACA;;AAGF;EACE;EACA;;;ACtBJ;EACE;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;;;AFIF;EACE;EACA;EAEA;EACA;EACA;EAEA;EACA;EACA;EAEA;EACA;;AAEA;EACE;EACA;EACA;EACA;;AAEA;EACE;;AAEA;EAHF;IAII;;;AAGF;EACE;EACA;EACA;EACA;EACA;EACA;EACA;;AAGF;EACE;EACA;EACA;EACA;EACA;EACA;EACA;;AAKF;EADF;IAEI;;;AAKN;EAEE;EACA;EACA;EACA;;AAGF;EACE;;;AGhFJ;EACE;EACA;EACA;;;AAGF;EACE;EACA;EACA;EAEA;EACA;EAEA;EACA;EACA;EAEA;EACA;EAEA;;AAEA;EACE;EAEA;EACA;;;AH4DJ;EACE;EACA;EACA;EAEA;EACA;EACA;EACA;EACA;EAEA;EACA;EACA;EACA;EACA;EACA;EACA;EACA","file":"page--main.css"}

layouts/styles/page--main.scss

@@ -25,6 +25,9 @@ body {
   justify-content: space-between;
   align-items: center;
 
+  position: relative;
+  z-index: 1;
+
   &__middle {
     display: flex;
     justify-content: center;
@@ -80,7 +83,7 @@ body {
 
 }
 
-@import "page--breakpoints";
+@import "page--preview";
 
 .open_in_new_tab {
   --size: 1.5rem;

layouts/styles/page--view.css

@@ -1,6 +1,6 @@
 body {
   margin: 0;
-  overflow-y: scroll;
+  overflow-y: hidden;
 }
 
 main {

layouts/styles/page--view.scss

@@ -1,6 +1,6 @@
 body {
   margin: 0;
-  overflow-y: scroll;
+  overflow-y: hidden;
 }
 
 main {