Create multiple metafields (aka flock)

Vanilla JS
FieldsRaven Fetch wrapper (aka Storefront JS Kit)
<!-- JavaScript + Liquid -->
<script type="text/javascript">
flockSubmit = (value) => {
const ravenObjOne = {%- render 'raven-mac-gen', resource_id: customer.id, raven_id: raven_id_1 -%};
const valueObjOne = { value: 'text value' };
const requestParamsOne = Object.assign({}, ravenObjOne, valueObjOne);
const ravenObjTwo = {%- render 'raven-mac-gen', resource_id: customer.id, raven_id: raven_id_2 -%};
const valueObjTwo = { value: 1 };
const requestParamsTwo = Object.assign({}, ravenObjTwo, valueObjTwo);
const ravenObjThree = {%- render 'raven-mac-gen', resource_id: customer.id, raven_id: raven_id_3 -%};
const valueObjThree = { value: 1.2 };
const requestParamsThree = Object.assign({}, ravenObjThree, valueObjThree);
const requestParams = { flock: [requestParamsOne, requestParamsTwo, requestParamsThree] }
const response = fetch('/apps/raven/create_multiple_metafields', {
method: 'PUT',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify(requestParams)
})
response
.then(res => res.json())
.then(resJson => console.log('resJson: ', resJson))
}
</script>
<!-- HTML -->
<button id="fieldsraven-demo" onclick="flockSubmit()">Send the Flock!</button>
<!-- JavaScript + Liquid -->
<script type="text/javascript">
flockSubmit = (value) => {
const ravenObjOne = {%- render 'raven-mac-gen', resource_id: customer.id, raven_id: raven_id_1 -%};
const valueObjOne = { value: 'text value' };
const requestParamsOne = Object.assign({}, ravenObjOne, valueObjOne);
const ravenObjTwo = {%- render 'raven-mac-gen', resource_id: customer.id, raven_id: raven_id_2 -%};
const valueObjTwo = { value: 1 };
const requestParamsTwo = Object.assign({}, ravenObjTwo, valueObjTwo);
const ravenObjThree = {%- render 'raven-mac-gen', resource_id: customer.id, raven_id: raven_id_3 -%};
const valueObjThree = { value: 1.2 };
const requestParamsThree = Object.assign({}, ravenObjThree, valueObjThree);
const response = FieldsRaven.sendMultiple([requestParamsOne, requestParamsTwo, requestParamsThree]);
response.then(res => console.log('FieldsRaven.send response: ', res))
}
</script>
<!-- HTML -->
<button id="fieldsraven-demo" onclick="flockSubmit()">Send the Flock!</button>