Execute JavaScript from rules

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Warning Work in progress! We are in the process of updating the information on this page. Subject to change.

The Resco platform offers two main options for adding business logic to your projects:

  • Rules which represent the no-code approach for simpler use cases
  • Resco JavaScript Bridge that allows you to write custom scripts to modify UI, data, and access additional functions

The option to execute scripts directly from rules combines these two options. It aims to simplify writing JavaScript for Mobile CRM by removing the need for boilerplate code, and it should open path for creating reusable JavaScript libraries with additional functionality for Resco mobile apps, e.g., additional math, date, or string operations, and also business logic.

For now, this option is supported for form rules

Offline HTML

Some prep work is necessary in the Offline HTML section of Woodford. TBD

Adding the function calls to rules



<!DOCTYPE html>
    <meta charset="utf-8" />
    <title>JS from Resco rules</title>
    <meta http-equiv='X-UA-Compatible' content='IE=edge' />
    <meta name='viewport' content='initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no'>
    <script type='text/javascript' src='JSBridge.js'></script>
        function getAccountEntity() {
            return new Promise(function(resolve, reject) {
                var contact = new MobileCRM.FetchXml.Entity("account"); // NOTE: If we save to shared variable of type entity ACCOUNT, we need to create/fetch account entity.

                var fetch = new MobileCRM.FetchXml.Fetch(contact);
                fetch.execute("DynamicEntities", function (res) {
                    var current = res[getRandomInt(res.length)];
                    var entity = new MobileCRM.DynamicEntity(current.entityName, current.id, current.primaryName, clearInvalidProps(current.properties));
                }, reject, null);

        function getLookUp() {
            return new Promise(function(resolve, reject) {
                var account = new MobileCRM.FetchXml.Entity("contact");

                var fetch = new MobileCRM.FetchXml.Fetch(account);
                fetch.execute("DynamicEntities", function (res) {
                    var current = res[getRandomInt(res.length)];
                    resolve(new MobileCRM.Reference(current.entityName, current.id, current.primaryName));
                }, reject, null);

        function getInteger() { return getRandomInt(128); }
        function getString() { return getRandomString(); }
        function getDecimal() {
            var precision = 100; // 2 decimals
            return Math.floor(Math.random() * (10 * precision - 1 * precision) + 1 * precision) / (1 * precision);
        function getStringList() {
            var res = [];
            for (var i = 0; i < getRandomInt(); i++)

            return res;
        function getDateTime() {
            var dt = new Date();
            return dt.toLocaleTimeString();

        // **** Helpers ****

        function getRandomString(length) {
            var len = length || 7;
            return Math.random().toString(36).substring(len);
        function getRandomInt(maximum) {
            var max = maximum || 4;
            return Math.floor(Math.random() * Math.floor(max));