Web/API/PaymentRequest/onmerchantvalidation

DeprecatedThis feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

Non-standard This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

Secure contextThis feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

The PaymentRequest event handler onmerchantvalidation is invoked when the merchantvalidation is fired, indicating that the payment handler (e.g., Apple Pay) requires the merchant to validate themselves. This is usually the first event to be fired, and the user won't be able to proceed with a payment until the merchant validate themselves.

This event is not be fired by all payment handlers. In particular, it's used by Apple Pay.

Syntax

paymentRequest.onmerchantvalidation = eventHandlerFunction;

Value

An event handler function which is to be called whenever the merchantvalidation event is fired at the PaymentRequest, indicating that the payment handler requires the merchant to validate themselves as allowed to use this payment handler.

Examples

An example merchant validation handler for the PaymentRequest object request looks like this:

request.onmerchantvalidation = ev => {
  ev.complete(async () => {
    const merchantServerUrl = window.location.origin +
        '/validation?url=' + encodeURIComponent(ev.validationURL);
    // get validation data, and complete validation;
    return await fetch(merchantServerUrl).then(r => r.text());
  })
};

const response = await request.show();

For more information, see Merchant Validation in Payment processing concepts.

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
onmerchantvalidation	Chrome No support No	Edge No support No	Firefox No support No Notes' No support No Notes' Notes' Available only in nightly builds.	IE No support No	Opera No support No	Safari Full support 11.1	WebView Android No support No	Chrome Android No support No	Firefox Android No support No Notes' No support No Notes' Notes' Available only in nightly builds.	Opera Android No support No	Safari iOS Full support Yes	Samsung Internet Android No support No

Legend

Full support  

Full support

No support  

No support

See implementation notes.'

See implementation notes.

PaymentRequest.onmerchantvalidation by Mozilla Contributors is licensed under CC-BY-SA 2.5.