Added CPE example

force-app/main/default/lwc/productTileList/productTileList.js

@@ -22,6 +22,18 @@ export default class ProductTileList extends LightningElement {
      */
     @api tilesAreDraggable = false;
 
+    /**
+     * min-size of the pictures shown
+     */
+    @api minPictureWidth;
+
+    renderedCallback() {
+        const productTiles = this.template.querySelectorAll('c-product-tile');
+        productTiles.forEach((tile) => {
+            tile.style.minWidth = `${this.minPictureWidth}px`;
+        });
+    }
+
     /** Current page in the product list. */
     pageNumber = 1;
 

force-app/main/default/lwc/productTileList/productTileList.js-meta.xml

@@ -37,6 +37,12 @@
                 type="Boolean"
                 label="Product tiles are draggable"
             />
+            <property
+                type="Integer"
+                name="minPictureWidth"
+                label="Min Picture Width"
+                editor="c/sliderEditor"
+            />
         </targetConfig>
     </targetConfigs>
 </LightningComponentBundle>

force-app/main/default/lwc/sliderEditor/sliderEditor.html

@@ -0,0 +1,13 @@
+<!-- sldsValidatorIgnore -->
+<template>
+    <div>
+        <lightning-slider
+            label={label}
+            step="1"
+            min="10"
+            max="1000"
+            value={width}
+            onchange={handleChange}
+        ></lightning-slider>
+    </div>
+</template>

force-app/main/default/lwc/sliderEditor/sliderEditor.js

@@ -0,0 +1,30 @@
+import { LightningElement, api } from 'lwc';
+
+export default class SliderEditor extends LightningElement {
+    @api label;
+    _width = 200; // Default width
+
+    @api
+    get width() {
+        return this._width;
+    }
+
+    set width(value) {
+        this._width = value;
+    }
+
+    connectedCallback() {
+        this.fireWidthChangedEvent();
+    }
+
+    handleChange(event) {
+        this._width = event.target.value;
+        this.fireWidthChangedEvent();
+    }
+
+    fireWidthChangedEvent() {
+        this.dispatchEvent(
+            new CustomEvent('valuechange', { detail: { value: this._width } })
+        );
+    }
+}

force-app/main/default/lwc/sliderEditor/sliderEditor.js-meta.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<LightningComponentBundle xmlns="http://soap.sforce.com/2006/04/metadata">
+    <apiVersion>59.0</apiVersion>
+    <isExposed>true</isExposed>
+   <masterLabel>Slider Custom Editor</masterLabel>
+   <targets>
+     <target>lightning__PropertyEditor</target>
+   </targets>
+</LightningComponentBundle>