Get exteriors list

To get current exteriors list send this postMessage:

JavaScript

iframeRoomtodo.contentWindow.postMessage(JSON.stringify({action:"get_exteriorsList"}), "*");

After that planner will return "send_floorList" message:

HTML

<iframe
    frameborder="0"
    id="iframe"
    src="https://example.com/planner/matconfig">
</iframe>

<script>

window.addEventListener("message", messageListener);

function messageListener(e) {
    try {
        const dataObj = JSON.parse(e.data);
        if (dataObj.action === "send_exteriorsList") {
            let exteriorsArray = data.exteriors;// Looks like: ['First exterior', 'Second exterior']
        }
    } catch (error) {
        console.error("Error parse JSON string!");
    }
}
</script>