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11 lines
230 B
HTML
11 lines
230 B
HTML
<!DOCTYPE html>
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<meta charset="utf-8">
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<title>A test page that echos back anything postMessaged to it to its parent</title>
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<script>
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"use strict";
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window.onmessage = ({ data }) => {
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parent.postMessage(data, "*");
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};
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</script>
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