Web&H5

Initializing the SDK

Embed the following code in the head TAB of the business-critical entry page

<script type="text/javascript">
	(function(){
		window._fmOpt = {
			partner: 'your partnerCode',
			success: function(data) {
				console.log('blackBox: ', data)
			}
		};
		var fm = document.createElement('script'); 
    fm.type = 'text/javascript'; fm.async = true;
		fm.src = 'Base URL' + '?t=' + (new Date().getTime()/3600000).toFixed(0);
		var s = document.getElementsByTagName('script')[0]; 
    s.parentNode.insertBefore(fm, s);
	})();
</script>

Base URL

1.Create Base URL

2.Copy Base URL

window._fmOpt Parameter Description

parameter	type	describe	remark	sample	required	Remove Field
partner	String	Name of partner	Do not change at will (only letters, numbers, underscores)	demo	Yes
channel	String	channel	Do not change at will (only letters, numbers, underscores)	demo_web	No
success	Function	Successful callback	Once the blackBox is successfully fetched, the incoming callback is called	function(data){ console.log('blackBox:',data) }	Yes
timeout	Integer	Collection timeout	The unit is ms. The default value is 2000. If all processes are not completed after the specified time, a demoted blackBox is obtained	2000	No
strictMode	Boolean	Strict mode	true: The current demoted blackBox is returned when demoted false: Returns the cached last non-demoted blackBox (default) when demoted	false	No
geolocation	Boolean	Enable geolocation collection	true: Enable(After enabling it, the customer needs to obtain the permission themselves. The permission acquisition code is as follows) false: Disable (default)	false	No	latitude、longitude

When geolocation is configured to true, the customer needs to actively obtain the geographical location permission

if (navigator.geolocation) {
  // The first execution will trigger the pop-up box for authorization
  navigator.geolocation.getCurrentPosition(function () {}, function () {});
} else {
  // The current environment does not support obtaining geographical location information
}

Synchronously obtain the method of blackBox

The synchronous method may increase the probability of generating a degraded "blackBox". Please use it with caution in combination with the business scenario.

if (window._fmOpt && window._fmOpt.getinfo) {
  // Synchronously obtain the blackBox
  var your_blackBox = window._fmOpt.getinfo()
} else {
  // JSSDK has not been loaded completely
}

Status Check

The SDK successfully reports the data and the returned result is a 26-character string. For example: gWPHA1780038520GyQHv1YhD61.
In abnormal situations, the length of the returned result may reach 5,000 characters. For details, you can check the differences between the normal blackBox and the degraded blackBox

Get SDK Version

Obtain by source code file

/**
 * TrustDeviceJs Pro v4.2.2 - Copyright (c) TrustDeviceJs, Inc, 2026 (https://www.trustdecision.com/solutions/trustdevice)
*/

Obtain by code in runtime

window._fmOpt.sdkVersion