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feat: Add option to add CSP to the replay iframe #1766

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feat: Add option to add CSP to the replay iframe #1766

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cb29098
feat: Add option to add CSP to the replay iframe
KristianGrafana Dec 2, 2025
4016cb3
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KristianGrafana Dec 3, 2025
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10 changes: 8 additions & 2 deletions packages/rrweb/src/replay/index.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -618,6 +618,12 @@
// hide iframe before first meta event
this.iframe.style.display = 'none';
this.iframe.setAttribute('sandbox', attributes.join(' '));

// Apply CSP if configured
if (this.config.csp) {
this.iframe.setAttribute('csp', this.config.csp);
}

this.disableInteract();
this.wrapper.appendChild(this.iframe);
if (this.iframe.contentWindow && this.iframe.contentDocument) {
Expand Down Expand Up @@ -932,7 +938,7 @@
sn?.type === NodeType.Element &&
sn?.tagName.toUpperCase() === 'HTML'
) {
const { documentElement, head } = iframeEl.contentDocument!;

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[@typescript-eslint/no-non-null-assertion] Forbidden non-null assertion.
this.insertStyleRules(
documentElement as HTMLElement | RRElement,
head as HTMLElement | RRElement,
Expand All @@ -951,14 +957,14 @@
};

buildNodeWithSN(mutation.node, {
doc: iframeEl.contentDocument! as Document,

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[@typescript-eslint/no-non-null-assertion] Forbidden non-null assertion.
mirror: mirror as Mirror,
hackCss: true,
skipChild: false,
afterAppend,
cache: this.cache,
});
afterAppend(iframeEl.contentDocument! as Document, mutation.node.id);

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[@typescript-eslint/no-non-null-assertion] Forbidden non-null assertion.

for (const { mutationInQueue, builtNode } of collectedIframes) {
this.attachDocumentToIframe(mutationInQueue, builtNode);
Expand Down Expand Up @@ -1075,7 +1081,7 @@
const canvas = document.createElement('canvas');
const ctx = canvas.getContext('2d');
const imgd = ctx?.createImageData(canvas.width, canvas.height);
ctx?.putImageData(imgd!, 0, 0);

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}
}
private async deserializeAndPreloadCanvasEvents(
Expand Down Expand Up @@ -1396,7 +1402,7 @@
// Only apply virtual dom optimization if the fast-forward process has node mutation. Because the cost of creating a virtual dom tree and executing the diff algorithm is usually higher than directly applying other kind of events.
if (this.config.useVirtualDom && !this.usingVirtualDom && isSync) {
this.usingVirtualDom = true;
buildFromDom(this.iframe.contentDocument!, this.mirror, this.virtualDom);

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// If these legacy missing nodes haven't been resolved, they should be converted to virtual nodes.
if (Object.keys(this.legacy_missingNodeRetryMap).length) {
for (const key in this.legacy_missingNodeRetryMap) {
Expand Down Expand Up @@ -1513,7 +1519,7 @@
// If the parent is attached a shadow dom after it's created, it won't have a shadow root.
if (!hasShadowRoot(parent)) {
(parent as Element | RRElement).attachShadow({ mode: 'open' });
parent = (parent as Element | RRElement).shadowRoot! as Node | RRNode;

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} else parent = parent.shadowRoot as Node | RRNode;
}

Expand All @@ -1536,8 +1542,8 @@
const targetDoc = mutation.node.rootId
? mirror.getNode(mutation.node.rootId)
: this.usingVirtualDom
? this.virtualDom
: this.iframe.contentDocument;
? this.virtualDom
: this.iframe.contentDocument;
if (isSerializedIframe<typeof parent>(parent, mirror)) {
this.attachDocumentToIframe(
mutation,
Expand Down
1 change: 1 addition & 0 deletions packages/rrweb/src/types.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -196,6 +196,7 @@ export type playerConfig = {
warn: (...args: Parameters<typeof console.warn>) => void;
};
plugins?: ReplayPlugin[];
csp?: string;
};

export type missingNode = {
Expand Down
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