JavaScript SDK

Control and configure the Userback widget programmatically — identify users, manage widget visibility, trigger surveys, and capture session data.

SDK Methods

Identify Users

identify(uid: string, attributes: object)

Identifies a logged-in user with unique attributes. Should be used after initializing the widget.

MyApp.on('login', () => {
  Userback.identify('123456', {
    name: 'Jane Doe',
    email: '[email protected]',
    plan: 'Enterprise',
    account_id: '789XYZ'
  });
});

Note:

• identify() updates existing records, without overwriting all data.
• Key names should not contain special characters.
• Values must be JSON strings, numbers, or booleans.

user_data: object

Use this when the JavaScript SDK hasn't been initialized. This will identify the user and provide a similar set of attributes.

Userback.user_data = {
  id: '123456',
  info: {
    name: 'Jane Doe',
    email: '[email protected]',
    plan: 'Enterprise',
    account_id: '789XYZ'
  }
};

Widget Button

showLauncher(project_key?: string), hideLauncher()

Show or hide the Userback widget button on the screen.

Project Keys: project_key is optional — pass it to showLauncher() to switch to a different project before showing the widget.

Userback.showLauncher(); // Show the widget
Userback.hideLauncher(); // Hide the widget
Userback.showLauncher('PROJECT_KEY');  // Switch to this project, then show the widget

Widget Pop-up

openForm(type: string, destination: string, project_key?: string)

Opens the widget for specified feedback type and destination. Tip: Hide the Widget Button with Widget Settings.

Feedback Types: general, bug, and feature_request

Destinations: screenshot, video, and form

Project Keys: project_key is optional — pass it to switch to a different project's widget before opening the form.

Userback.openForm('bug', 'screenshot'); // open the screenshot tool and then direct to the bug form
Userback.openForm('bug', 'screenshot', 'PROJECT_KEY'); // switch to PROJECT_KEY first, then open the screenshot tool and then direct to the bug form

close()

Closes the Userback widget popup.

Userback.close();

setTheme()

Sets light or dark mode for the widget.

Userback.setTheme('light'); // light, dark, auto

Widget Destroy

destroy()

Removes the Userback widget and SDK from your application.

Userback.destroy();

Survey

openSurvey(survey_id: string)

Opens the specified survey. Tip: Hide the Survey with Survey Settings.

Userback.openSurvey('YOUR_SURVEY_ID'); 

closeSurvey()

Closes the Userback survey.

Userback.closeSurvey(); 

Session Replay

startSessionReplay(options: object)

When session replay is turned off for your domain, you can still start it programmatically using startSessionReplay().

Userback.startSessionReplay({
    block_rule: '.userback-block', // optional
    ignore_rule: '.userback-ignore', // optional
    log_level: ['log', 'warn', 'info', 'debug', 'error'], // optional
    tags: ['tag1', 'tag2'] // optional
}); 

stopSessionReplay()

Stops full session replay.

Userback.stopSessionReplay(); 

Custom Event

addCustomEvent(event_title, event_details)

Record a custom event with optional details, useful for session replay or triggering surveys.

Userback.addCustomEvent('account_upgrade', {
    account_id: 123456,
    amount: '99'
});

SDK Options

Name and Email

Automatically populate Feedback name and email fields without relying on User Identification.

email: string

Set the default email. The email field will be auto-filled in the feedback form.

Userback.email = "[email protected]";

name: string

Set the default name. The name field will be auto-filled in the feedback form.

Userback.name = "Someone";

Categories and Priority

categories: string

Preselect the category that will be chosen in the feedback form. The value assigned must match one of the existing categories already configured in your Userback settings.

Userback.categories = "Frontend"; // Preselects the 'Frontend' category

priority: string

Set the default priority level for feedback.

Priority Types: low, neutral, high, and urgent

Userback.priority = "urgent"; // Sets the priority to 'urgent'

Custom Data

setData(data: object)

Capture session-specific or dynamically changing data. Use this method after initializing the widget with init().

Userback.setData({
    AB_test_variant: 'B',
    time_on_page: '2m 15s'
});

Note:

• setData() can be called multiple times, overwriting previous data.
• Key names should not contain special characters.
• Values must be JSON strings, numbers, or booleans.

custom_data: object

Capture static custom data when the JavaScript SDK hasn't been initialized.

Userback.custom_data = {
    page_name: 'Checkout',
    user_status: 'Active'
};

Event Handling

on_load, on_open, on_close, before_send, after_send, on_survey_submit

Customize the widget's behavior during specific events.

Userback.on_load = () => {
  console.log("Widget Loaded");
};

Build Environment

is_live: boolean

Configure the screenshot engine based on your website's hosting environment.

• is_live: true: Use this when your website is locally hosted, but assets like images and scripts are publicly accessible. Enables the live screenshot server for higher-quality captures.
• is_live: false: Forces the use of the client-side screenshot engine, which may not generate pixel-perfect images. Recommended for restricted or isolated environments. Learn how to whitelist our IPs for improved quality.

Userback.is_live = true;

Native Screenshot

native_screenshot: boolean

Force the browser's built-in Screen Capture API for capturing screenshots.

Userback.native_screenshot = true

Note: Useful when dealing with complex web elements like shadow DOM and iframes. This enables pixel-perfect screenshots that may not be achievable using our default screenshot engine.

Widget Settings

widget_settings: object

Dynamically configure various aspects of your widget's appearance and functionality.

Global Settings

language (string): "en", "fr", "zh-CN" Language code options

ui_theme (string): "light", "dark", "default" style (string): "text", "circle"
position (string): "e", "w", "se", "sw"
trigger_type (string): "page_load", "api", "url_match"
main_button_text (string)
main_button_background_colour (string) "#000FFF"
main_button_text_colour (string) "#000FFF"
device_type (string): "desktop", "tablet", "phone"
help_link (string)
help_title (string)
help_message (string)
logo (string)

Form Settings

rating_type (string): "star", "emoji", "heart", "thumb", "numbers"
rating_help_message (string)
name_field (boolean)
name_field_mandatory (boolean)
email_field (boolean)
email_field_Mandatory (boolean)
title_field (boolean)
title_field_mandatory (boolean)
comment_field (boolean)
comment_field_mandatory (boolean)
display_category (boolean)
display_feedback (boolean)
display_attachment (boolean)
display_assignee (boolean)
display_priority (boolean)

Userback.widget_settings = {
    language                      : "en",
    ui_theme                      : 'light', 
    style                         : "text",    
    position                      : "e",
    trigger_type                  : "page_load", 
    main_button_text              : "Feedback", 
    main_button_background_colour : "#3E3F3A",  
    main_button_text_colour       : "#FFFFFF",
    device_type                   : "desktop,tablet,phone", 
    help_link                     : "https://www.example.com", 
    help_title                    : "Contact Us",              
    help_message                  : "Get in touch with us",    
    logo                          : '//example.com/logo.jpg',   
    form_settings: {
        // General Feedback Form
        general: {
            rating_type             : "star",
            rating_help_message     : "How would you like to rate your experience?", 
        },
        // Bug Form
        bug: {...},
        // Feature Request Form
        feature_request: {...}
    }
};

See the JavaScript SDK in action

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