NOW Experience: how to open a New Tab via dispatch

You can open new tab in Agent Workspace in 2 ways: 1) Via component; 2) Via Client Script.

UI Component

Component does not require any dependencies. The action name to open a new record (new tab) is called ‘REFERENCE_INFO_CLICK’. If we create a component and put it in the contextual side panel, when the button is clicked, it will open a new tab with provided details, or if the tab is open it will switch to the tab itself. This component can be used anywhere in AW, not just side panel.

import { createCustomElement } from '@servicenow/ui-core';
import snabbdom from '@servicenow/ui-renderer-snabbdom';


const view = (state, { updateState, dispatch }) => {
    return (
            <button on-click={
                () => {
                    dispatch(REFERENCE_INFO_CLICK, {
                        "referenceInfoClick": {
                            // Table of record you want to open
                            "referencetable": "sys_user", 

                            // Record you want to open sys_id
			    "sys_id": "6816f79cc0a8016401c5a33be04be441" 
            }> Open New Tab</button>

createCustomElement('x-177418-dispatch-new-tab', {
    renderer: { type: snabbdom },

Client Script

You have to use GlideAgentWorkspace (g_aw) API. This one is fully documented here. For example:

g_aw.openRecord("sys_user", "6816f79cc0a8016401c5a33be04be441");

NOW Experience: HTTP Effect Cheat Sheet

Http Effect is currently the single official method to communicate to ServiceNow server via REST API’s using Seismic UI framework.

Note: information is up to date as of latest Orlando release.

To install it:

npm install @servicenow/ui-effect-http

Import it to your js file:

import { createHttpEffect } from '@servicenow/ui-effect-http';

URL, Method and Headers option

They are typical REST API endpoints and options that can be found via REST API explorer, docs or by navigating SN pages and inspecting chrome developer tools network tab.

Batch option

With batch you define and use same REST API endpoints, but they get converted to /api/now/v1/batch endpoint with encoded request and response payloads.

Batching is set to true by default, batching comes with performance improvement in certain cases when 2 or more API calls are required. Batching single API call has worse performance than not using batch. Batching too many API calls together might have worse end user experience if users can be presented with something first, rather than everything at once. Encoded payload makes payload debugging harder.

encodeURIComponent option

Encodes the call with percent encoding removing all non-alpha numerical characters (# becomes %23 for example). Should be left default at true.

dataParam option

This is used to build Request Payload (body), usually for POST calls. Second parameter of dispatch function holds single JSON object for the Call parameters. In this case object name is data and in the Effect it is defined as ‘data’ string. Only the names should match, it could be called anything. Below will create a user with provided details.


dispatch(USER_CREATED, {
    data: { "active": "true", "user_name": "E1325", "first_name": "John", "last_name": "Doe" }

Action handler:

USER_CREATED: createUserEffect,


const createUserEffect = createHttpEffect('/api/now/table/sys_user', {
    method: 'POST',
    dataParam: 'data',

pathParams option

Second parameter of dispatch function holds JSON object for the Call parameters that are in pairs. URL maps to JSON object by putting : in front of object name.


    table: 'sys_user',
    sysparm_query: 'active=true',
    sysparm_limit: 10

Action handler:

USER_FETCHED: fetchUsersEffect,


const fetchUsersEffect = createHttpEffect('/api/now/table/:table', {
    batch: false,
    method: 'GET',
    pathParams: ['table'],
    queryParams: [
    successActionType: USER_FETCH_SUCCESS,

Note: you can mix pathParams with queryParams within single Effect, however you cannot mix dataParams option.

queryParams option

This option looks similar to REST API Explorer in SN options. It holds a JSON object with and maps exactly.


dispatch(USER_FETCHED, {
    "id": "E1324", "first_name": "Abel"

Action handler:

USER_FETCHED: fetchUsersEffectQueryParams,


const fetchUsersEffectQueryParams = createHttpEffect('/api/now/table/sys_user?sysparm_query=user_name=:id^ORfirst_nameLIKE:first_name', {
    method: 'GET',
    queryParams: ['id', 'first_name']


Gets triggered right at the start of API call execution.


Used when on progress event is triggered by API call, useful when uploading large attachments to give feedback about upload state. Hovewer, this does not seem possible with current state of HTTPEffect, so I have not found any actual uses yet. Would be interested to hear other experiences.


Gets triggered right when API call is done successfully.


Gets triggered right when API call is completed with failure.

Action Type handling:

Coeffects variable holds everything that is available for the action handler. In below case ‘result’ variable will hold the response payload (this is same as coeffects.action.payload.result). Response headers are not available yet.

UpdateState will update the initialState with the result payload:

USER_FETCH_SUCCESS: (coeffects) => {
    const {action: {payload: {result}} } = coeffects;

    for (var a in result) {
            path: 'records.users',
            value: result[a],
            operation: 'push'

NOW Experience: How to customize ServiceNow Component source code to build you own Workspaces

ServiceNow Components not only can be used for your workspace development, but you can use existing component source code to change or extend functionality beyond provided component parameters, even for some undocumented components.

Click here to learn how to modify customer hidden classic ServiceNow application files.

Similar to Service Portal widgets, SN Components are read only and cannot be customized. You need to make a copy first. However, you will not find human readable source code anywhere in ServiceNow and you cannot just press ‘Copy’ button to make it work.

Note: not all components can be modified at this time because not all dependencies are available yet, however it is a good tool to browse and learn how Seismic is implemented.

If the component is documented, source code can be installed via NPM install, if not, you will need to utilize Chrome developer tools by having ‘Enable JavaScript source maps’ enabled via settings and by opening any workspace where component source code is executed.

If you open the source code for chrome.jsdbx, you see that source map was detected:

Doing CTRL+F search for ‘sourceMappingURL’ you will find the name and the link for the source map file:

For example: /scripts/@servicenow/now-button/ or /scripts/@servicenow/now-record-common/

Download it and use any source map browser (like this) to find the src folder and copy required source code for the component. Usually source files with a component code has @seismicElement declaration.

Going forward you need to set up your development environment. More info on SN Docs here.

  1. Download VS Code, git Bash, Node.js
  2. Create new project folder – right click to open with VS Code
  3. Set up VS Code terminal to utilize bash
  4. Run following commands:
npm install --global @servicenow/cli@orlando

now-cli login --host --method basic --username username --password password

now-cli project --name @servicenow_think/customize-components

npm install

now-cli develop --open

You should have your component running live by now.

Copy the source code from the map file and required dependencies (this can get tricky). Make sure declarations and names match in your files.

Change element name in the source code as well:

For POC purposes, add console.log statement on click and hardcode the button label in the source code:

Test Component locally:

Now register the component to UI Builder via now-ui.json:

Deploy the component to your instance:

now-cli deploy --open

It should appear in UI builder:

Add the component, save and activate the workspace page.

That’s it, it is possible to customize anything. Don’t forget to follow customization best practices!