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<script> | |
window.addEventListener('message', function(e) { | |
window.console.log('post message received.'); | |
var data = JSON.parse(e.data); | |
if (data.length == 1 && data[0] === 'ping') { | |
e.source.postMessage(JSON.stringify(['pong']), '*'); | |
} | |
}); | |
</script> |