appwrite/app/sdks/js/docs/examples/database/create-document.md

let sdk = new Appwrite();

sdk
    setProject('')
    setKey('')
;

let promise = sdk.database.createDocument('[COLLECTION_ID]', '{}');

promise.then(function (response) {
    console.log(response);
}, function (error) {
    console.log(error);
});