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Web API Destination

Web Source code Package

The web API destination allows you to send events from the browser to any HTTP endpoint with customizable data transformation and transport methods.

Where This Fits

Web API is a web destination in the walkerOS flow:

Sends events from the browser to any HTTP endpoint using fetch, XHR, or beacon transport with customizable request formatting.

Installation

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Setup

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Configuration reference

PropertyTypeDescriptionMore
url*stringThe HTTP endpoint URL to send events to
headersRecord<string, string>Additional HTTP headers to include with requests
method*stringHTTP method for the request
transformfunctionFunction to transform event data before sending
transport*'fetch' | 'xhr' | 'beacon'Transport method for sending requests
* Required fields

Usage

Basic Usage

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Advanced Usage with Transform

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Examples

Sending to Analytics API

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Using Beacon Transport

For critical events that need to be sent even when the page is unloading:

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Custom Data Mapping

Use mapping rules to control which events are sent:

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Transport methods

  • fetch (default): Modern, promise-based HTTP requests
  • xhr: Traditional XMLHttpRequest for older browser compatibility
  • beacon: Uses Navigator.sendBeacon() for reliable data transmission during page unload

Mapping

By default the sendWeb function is used to send the events to an API.

Event
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Mapping
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Result
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