{"templateId":"markdown","versions":[{"version":"v1","label":"v1","link":"/products/checkout/web/v1/shadow-dom","default":false,"active":false,"folderId":"c6f087f2"},{"version":"v2","label":"v2","link":"/products/checkout/web/shadow-dom","default":true,"active":true,"folderId":"c6f087f2"}],"sharedDataIds":{"sidebar":"sidebar-products/checkout/web/sidebars.yaml"},"props":{"metadata":{"markdoc":{"tagList":["partial","tabs","tab","code-snippet"]},"custom_product":"Checkout","type":"markdown"},"seo":{"title":"Shadow DOM","description":"Worldpay for Developers - docs, code examples, resources and tools. Everything you need to build your omnichannel payment solution.","siteUrl":"https://docs.worldpay.com/access","image":"/access/assets/worldpay-logo-light.21b7daf79984773a9fcd7d4fbcb07ae5289dfffd6023c4c3dca720c7058e53dc.33f780a6.svg","keywords":"documentation, api, openapi, sdks, developer, payments, json, payouts, 3ds","jsonLd":{"@context":"https://schema.org","@type":"Organization","url":"https://docs.worldpay.com/access","name":"Worldpay"},"meta":[{"name":"google-site-verification","content":"zjziIKaP3ImsqsfhYnEBnq1R85UabiSwl7HTXuwtZuo"},{"name":"doc_product","content":"Access"},{"name":"doc_category","content":"Documentation"}],"llmstxt":{"hide":false,"sections":[{"title":"Payments API","description":"Payment orchestration API combining fraud assessment, 3ds authentication, SCA exemptions, Worldpay Token creation and a card or wallet based payment.","includeFiles":["products/payments/@20240601/**/*"],"excludeFiles":[]},{"title":"Payment Queries API","description":"Querying your payments data, based on a variety of parameters.","includeFiles":["products/payment-queries/@v1/**/*"],"excludeFiles":[]},{"title":"Card BIN Data API","description":"Provides detailed information about a card.","includeFiles":["products/card-bin/@v1/**/*"],"excludeFiles":[]},{"title":"3DS Authentication API","description":"Request 3DS authentication to protect against fraud, be SCA compliant and to shift liability using this standalone API.","includeFiles":["products/3ds/@v3/**/*"],"excludeFiles":[]},{"title":"FraudSight API","description":"Request a risk assessment and receive a response with an outcome (e.g. lowRisk) using this standalone API.","includeFiles":["products/fraudsight/@v1/**/*"],"excludeFiles":[]},{"title":"Checkout SDK","description":"Integrate using our clientside SDKs for both web and native devices. 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",{"$$mdtype":"Tag","name":"MarkdownLink","attributes":{"href":"/products/checkout/web/changelog/"},"children":[{"$$mdtype":"Tag","name":"strong","attributes":{},"children":["Change log"]}]}]},{"$$mdtype":"Tag","name":"Heading","attributes":{"level":1,"id":"shadow-dom","__idx":0},"children":["Shadow DOM"]},{"$$mdtype":"Tag","name":"hr","attributes":{},"children":[]},{"$$mdtype":"Tag","name":"p","attributes":{},"children":["You can inject the SDK in a Shadow DOM, making sure that the encapsulation of your HTML code/custom elements is preserved."," ","Both ",{"$$mdtype":"Tag","name":"code","attributes":{},"children":["open"]}," and ",{"$$mdtype":"Tag","name":"code","attributes":{},"children":["closed"]}," modes are supported."]},{"$$mdtype":"Tag","name":"Heading","attributes":{"level":4,"id":"example-configuration","__idx":1},"children":["Example configuration"]},{"$$mdtype":"Tag","name":"p","attributes":{},"children":["To inject the SDK in a Shadow DOM, you must pass a reference to the ",{"$$mdtype":"Tag","name":"code","attributes":{},"children":["shadowRoot"]}," of your Shadow DOM in the SDK configuration:"]},{"$$mdtype":"Tag","name":"CodeBlock","attributes":{"data-language":"javascript","header":{"controls":{"copy":{}}},"source":"Worldpay.checkout.init(\n  {\n    id: \"your-checkout-id\",\n    form: \"#card-form\",\n    fields: {\n      pan: {\n        selector: \"#card-pan\",\n        placeholder: \"4444333322221111\"\n      },\n      cvv: {\n        selector: \"#card-cvv\",\n        placeholder: \"123\"\n      },\n      expiry: {\n        selector: \"#card-expiry\",\n        placeholder: \"MM/YY\"\n      }\n    },\n    shadowRoot: myShadowRoot // a reference to a shadow root is passed in the shadowRoot property\n  },\n  function (error, checkout) {\n    if (error) {\n      console.error(error);\n      return;\n    }\n    \n    // rest of your code run at the time where the SDK is initialized\n  }\n);\n","lang":"javascript"},"children":[]},{"$$mdtype":"Tag","name":"Heading","attributes":{"level":3,"id":"integration-with-custom-elements","__idx":2},"children":["Integration with custom elements"]},{"$$mdtype":"Tag","name":"p","attributes":{},"children":["You can also leverage the power of Shadow DOM to encapsulate all your checkout code in a custom element."]},{"$$mdtype":"Tag","name":"p","attributes":{},"children":["Here is a full example:"]},{"$$mdtype":"Tag","name":"Tabs","attributes":{"size":"medium"},"children":[{"$$mdtype":"Tag","name":"div","attributes":{"label":"HTML","disable":false},"children":[{"$$mdtype":"Tag","name":"CodeBlock","attributes":{"file":"./code/shadow-dom/custom-element.html","language":"html","header":{"controls":{"copy":{}}},"lang":"html","source":"<script language=\"JavaScript\">\n  // Place the JavaScript code here\n</script>\n\n<template id=\"custom-checkout-template\">\n    <style>\n        p {\n            color: white;\n            background-color: #666;\n            padding: 5px;\n        }\n\n        body {\n            font: 11px/22px sans-serif;\n            text-transform: uppercase;\n            background-color: #f7f7f7;\n            color: black;\n        }\n\n        .container {\n            height: 100vh;\n            display: flex;\n            justify-content: center;\n            align-items: center;\n        }\n\n        .card {\n            position: relative;\n            background: white;\n            padding: 40px 30px;\n            top: -30px;\n            width: 100%;\n            max-width: 300px;\n            border-radius: 12px;\n            box-shadow: 3px 3px 60px 0px rgba(0, 0, 0, 0.1);\n        }\n\n        .card .checkout .col-2 {\n            display: flex;\n        }\n\n        .card .checkout .col-2 .col:first-child {\n            margin-right: 15px;\n        }\n\n        .card .checkout .col-2 .col:last-child {\n            margin-left: 15px;\n        }\n\n        .card .checkout .label .type {\n            color: green;\n        }\n\n        .card .checkout.visa .label .type:before {\n            content: \"(visa)\";\n        }\n\n        .card .checkout.mastercard .label .type:before {\n            content: \"(master card)\";\n        }\n\n        .card .checkout.amex .label .type:before {\n            content: \"(american express)\";\n        }\n\n        .card .checkout .field {\n            height: 40px;\n            border-bottom: 1px solid lightgray;\n        }\n\n        .card .checkout .field#card-pan {\n            margin-bottom: 30px;\n        }\n\n        .card .checkout .field.is-onfocus {\n            border-color: black;\n        }\n\n        .card .checkout .field.is-empty {\n            border-color: orange;\n        }\n\n        .card .checkout .field.is-invalid {\n            border-color: red;\n        }\n\n        .card .checkout .field.is-valid {\n            border-color: green;\n        }\n\n        .card .checkout .submit {\n            background: red;\n            position: absolute;\n            cursor: pointer;\n            left: 50%;\n            bottom: -60px;\n            width: 200px;\n            margin-left: -100px;\n            color: white;\n            outline: 0;\n            font-size: 14px;\n            border: 0;\n            border-radius: 30px;\n            text-transform: uppercase;\n            font-weight: bold;\n            padding: 15px 0;\n            transition: background 0.3s ease;\n        }\n\n        .card .checkout.is-valid .submit {\n            background: green;\n        }\n\n        .clear {\n            background: grey;\n            position: absolute;\n            cursor: pointer;\n            left: 50%;\n            bottom: -120px;\n            width: 200px;\n            margin-left: -100px;\n            color: white;\n            outline: 0;\n            font-size: 14px;\n            border: 0;\n            border-radius: 30px;\n            text-transform: uppercase;\n            font-weight: bold;\n            padding: 15px 0;\n            transition: background 0.3s ease;\n        }\n    </style>\n\n    <section class=\"container\">\n        <section class=\"card\">\n            <form class=\"checkout\" id=\"card-form\">\n                <div class=\"label\">Card number <span class=\"type\"></span></div>\n                <section id=\"card-pan\" class=\"field\"></section>\n                <section class=\"col-2\">\n                    <section class=\"col\">\n                        <div class=\"label\">Expiry date</div>\n                        <section id=\"card-expiry\" class=\"field\"></section>\n                    </section>\n                    <section class=\"col\">\n                        <div class=\"label\">CVV</div>\n                        <section id=\"card-cvv\" class=\"field\"></section>\n                    </section>\n                </section>\n                <button class=\"submit\" type=\"submit\">Pay Now</button>\n            </form>\n            <button class=\"clear\" id=\"clear\">Clear</button>\n        </section>\n    </section>\n</template>\n\n<script src=\"https://try.access.worldpay.com/access-checkout/v2/checkout.js\" onload=\"addCheckout()\"></script>\n\n// For production change to \"https://access.worldpay.com/access-checkout/v2/checkout.js\"\n"},"children":[]}]},{"$$mdtype":"Tag","name":"div","attributes":{"label":"JavaScript","disable":false},"children":[{"$$mdtype":"Tag","name":"CodeBlock","attributes":{"file":"./code/shadow-dom/custom-element.js","language":"javascript","header":{"controls":{"copy":{}}},"lang":"javascript","source":"customElements.define(\n  'custom-checkout',\n  class extends HTMLElement {\n    get checkout() {\n      return this._checkout;\n    }\n\n    set checkout(value) {\n      return this._checkout = value;\n    }\n\n    connectedCallback() {\n      const shadow = this.attachShadow({ mode: 'closed' });\n\n      const template = document.getElementById('custom-checkout-template');\n      shadow.appendChild(template.content.cloneNode(true));\n\n      const thisInstance = this;\n\n      Worldpay.checkout.init(\n        {\n          id: 'identity',\n          form: '#card-form',\n          fields: {\n            pan: {\n              selector: '#card-pan',\n              placeholder: '4444 3333 2222 1111'\n            },\n            expiry: {\n              selector: '#card-expiry',\n              placeholder: 'MM/YY'\n            },\n            cvv: {\n              selector: '#card-cvv',\n              placeholder: '123'\n            }\n          },\n          styles: {\n            'input': {\n              'color': 'black',\n              'font-weight': 'bold',\n              'font-size': '20px',\n              'letter-spacing': '3px'\n            },\n            'input#pan': {\n              'font-size': '24px'\n            },\n            'input.is-valid': {\n              'color': 'green'\n            },\n            'input.is-invalid': {\n              'color': 'red'\n            },\n            'input.is-onfocus': {\n              'color': 'black'\n            }\n          },\n          enablePanFormatting: true,\n          shadowRoot: shadow,\n          allowNonLuhnCompliantCards: true,\n        },\n        function (error, checkout) {\n          if (error) {\n            console.error(error);\n            return;\n          }\n\n          thisInstance.checkout = checkout;\n\n          const form = shadow.getElementById('card-form');\n          form.addEventListener('submit', function (event) {\n            event.preventDefault();\n\n            checkout.generateSessionState(function (error, sessionState) {\n              if (error) {\n                console.error(error);\n                return;\n              }\n\n              // session state for card details\n              console.log(sessionState);\n            });\n          });\n\n          const clear = shadow.getElementById('clear');\n          clear.addEventListener('click', function (event) {\n            event.preventDefault();\n\n            checkout.clearForm(function () {\n              console.log('Form successfully cleared');\n            });\n          });\n        }\n      );\n    }\n\n    disconnectedCallback() {\n      this.checkout.remove();\n    }\n  }\n);\n\nfunction addCheckout() {\n  document.body.appendChild(document.createElement('custom-checkout'));\n}\n"},"children":[]}]}]},{"$$mdtype":"Tag","name":"Heading","attributes":{"level":3,"id":"limitations","__idx":3},"children":["Limitations"]},{"$$mdtype":"Tag","name":"p","attributes":{},"children":["The SDK is not compatible with nested Shadow DOMs per se, because it can only be initialized in a Shadow DOM when the host element belongs to the document's Light DOM."]},{"$$mdtype":"Tag","name":"p","attributes":{},"children":["If your Checkout form must be in a nested Shadow DOM, then a workaround consists in embedding your Checkout form into an iframe. Within the iframe's document context, the SDK can initialize normally either directly in the Light DOM or within a Shadow DOM."]}]},"headings":[{"value":"Shadow DOM","id":"shadow-dom","depth":1},{"value":"Example configuration","id":"example-configuration","depth":4},{"value":"Integration with custom elements","id":"integration-with-custom-elements","depth":3},{"value":"Limitations","id":"limitations","depth":3}],"frontmatter":{"seo":{"title":"Shadow DOM"}},"lastModified":"2025-09-22T09:15:26.000Z","pagePropGetterError":{"message":"","name":""}},"slug":"/products/checkout/web/shadow-dom","userData":{"isAuthenticated":false,"teams":["anonymous"]},"isPublic":true}