(Fix) Prevent accessing `contentWindow` if `iframe` is `null` (#1161)
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@ -226,9 +226,9 @@ function Apps({ closeModal, closeSnackbar, enqueueSnackbar, openModal }) {
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const sendMessageToIframe = useCallback(
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(messageId, data) => {
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const app = getSelectedApp()
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iframeEl.contentWindow.postMessage({ messageId, data }, app.url)
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iframeEl?.contentWindow.postMessage({ messageId, data }, app.url)
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},
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[getSelectedApp, iframeEl.contentWindow],
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[getSelectedApp, iframeEl],
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)
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// handle messages from iframe
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