Tag initialization

Tip. Working with the JavaScript API requires knowledge of HTML and JavaScript. If you don't have these skills, contact your website developer or webmaster.

Download the JavaScript library that is responsible for tag operation from the URL https://mc.yandex.ru/metrika/tag.js.

The code for enabling the library is available on the tag editing page. The library can be loaded asynchronously (recommended) or synchronously, but its functionality remains the same.

To create and manage a tag, use the ym method. It is created in the download code:

(function(m,e,t,r,i,k,a){m[i]=m[i]||function(){(m[i].a=m[i].a||[]).push(arguments)};
m[i].l=1*new Date();k=e.createElement(t),a=e.getElementsByTagName(t)[0],k.async=1,k.src=r,a.parentNode.insertBefore(k,a)})
(window, document, "script", "https://mc.yandex.ru/metrika/tag.js", "ym");

Required arguments for ym are the tag ID and the name of the function being called. The method can also be passed arguments of the invoked function. For example, to initialize a tag, you need to pass the tag ID, the name of the init function, and an array of parameters:

ym(XXXXXX, "init", {clickmap: true, webvisor: true});

If you do not want to pass parameters to the function, initialization will look like this:

ym(XXXXXX, "init", {});

The part of the code containing the main initialization parameters is generated on the Settings page. The full list of initialization parameters is shown in the table.

Functions that can be called via the ym method are described in the methods reference.

Parameters of tag initialization
Name	Default value	Type	Description
accurateTrackBounce	`false`	Boolean \| Number	Accurate bounce rate The parameter can accept these values: `true` — Enable the accurate bounce rate, with a non-bounce event registered after 15000 ms (15 s). `false` — Do not enable the accurate bounce rate. `<N>` (integer) — Enable the accurate bounce rate, with a non-bounce event registered after `<N> ms`.
clickmap	`false`	Boolean	Whether to collect data for a click map
defer	`false`	Boolean	Whether to disable automatically sending data during tag initialization
ecommerce	`false`	Boolean \| String \| Array	Collecting data for e-commerce. `true` — Enable e-commerce data collection. Data is transmitted via a JavaScript array named `dataLayer` in the global namespace (`window.dataLayer`). `false` — Disable e-commerce data collection. `<objectName>` (String) — Enable e-commerce data collection. Data is transmitted via a JavaScript array named `<objectName>` in the global namespace (`window.<objectName>`). `<array>` (Array) — Enable e-commerce data collection. Data is transmitted via the JavaScript array `array>`
params	—	Object \| Array	Session parameters transmitted during tag initialization. To transmit session parameters at any other time, use the params method.
userParams	—	Object	Parameters of site users that are transmitted when initializing the tag. To transmit user parameters at any other time, use the userParams method.
trackHash	`false`	Boolean	Hash tracking in the browser's address bar
trackLinks	`false`	Boolean	Track clicks on outbound links
type	`0`	Number	Tag type. 1 for YAN
ut	—	string	The only possible value is "noindex", which prohibits sending information about the page's existence to Yandex search robots. Using this parameter doesn't guarantee that the page won't be indexed. A robot can get information about a page's existence from other sources.
webvisor	`false`	Boolean	Whether to use Session Replay
triggerEvent	`false`	Boolean	Whether to check if the tag is ready

Parameters of tag initialization
Name	Default value	Type	Description
accurateTrackBounce	`false`	Boolean \| Number	Accurate bounce rate The parameter can accept these values: `true` — Enable the accurate bounce rate, with a non-bounce event registered after 15000 ms (15 s). `false` — Do not enable the accurate bounce rate. `<N>` (integer) — Enable the accurate bounce rate, with a non-bounce event registered after `<N> ms`.
clickmap	`false`	Boolean	Whether to collect data for a click map
defer	`false`	Boolean	Whether to disable automatically sending data during tag initialization
ecommerce	`false`	Boolean \| String \| Array	Collecting data for e-commerce. `true` — Enable e-commerce data collection. Data is transmitted via a JavaScript array named `dataLayer` in the global namespace (`window.dataLayer`). `false` — Disable e-commerce data collection. `<objectName>` (String) — Enable e-commerce data collection. Data is transmitted via a JavaScript array named `<objectName>` in the global namespace (`window.<objectName>`). `<array>` (Array) — Enable e-commerce data collection. Data is transmitted via the JavaScript array `array>`
params	—	Object \| Array	Session parameters transmitted during tag initialization. To transmit session parameters at any other time, use the params method.
userParams	—	Object	Parameters of site users that are transmitted when initializing the tag. To transmit user parameters at any other time, use the userParams method.
trackHash	`false`	Boolean	Hash tracking in the browser's address bar
trackLinks	`false`	Boolean	Track clicks on outbound links
type	`0`	Number	Tag type. 1 for YAN
ut	—	string	The only possible value is "noindex", which prohibits sending information about the page's existence to Yandex search robots. Using this parameter doesn't guarantee that the page won't be indexed. A robot can get information about a page's existence from other sources.
webvisor	`false`	Boolean	Whether to use Session Replay
triggerEvent	`false`	Boolean	Whether to check if the tag is ready

Checking tag initialization

You can use a special JavaScript event to find out if the tag is ready to operate. However, you must add the triggerEvent parameter set to true in the code snippet.

ym(XXXXXX, "init", {triggerEvent: true});

For jQuery, you can use the following code sample up to the moment of tag initialization:

jQuery(document).on('yacounterXXXXXXinited', function () {
    console.log('yaCounterXXXXXX tag is ready to use');
});

Enabling a tag using the tag management system

Yandex.Metrica tags can also be enabled using tag management systems (also called tag dispatchers or tag containers). These systems let you store all the necessary HTML/JavaScript code on an external server and connect it to webpages using small code snippets. This means you can make changes to the connected code without changing the code of webpages.

Tag management systems usually support two types of integrated code for tags: JavaScript and image. Yandex.Metrica supports both types of tags. Use the following code to integrate tags using tag management systems.

<script type="text/javascript">
(function(m,e,t,r,i,k,a){m[i]=m[i]||function(){(m[i].a=m[i].a||[]).push(arguments)};
m[i].l=1*new Date();k=e.createElement(t),a=e.getElementsByTagName(t)[0],k.async=1,k.src=r,a.parentNode.insertBefore(k,a)})
(window, document, "script", "https://mc.yandex.ru/metrika/tag.js", "ym");

ym(XXXXXX, "init",{<initialization parameters>});
</script>

<img src="https://mc.yandex.ru/watch/XXXXXX" style="position:absolute; left:-9999px;" alt="" />

Here, XXXXXX is the Yandex.Metrica tag ID.

The data collected may vary depending on the type of code snippet. For more information, see Data collected by the Yandex.Metrica tag.

You can enable multiple tags at once inside each tag, in the same way as described in Installing multiple tags on a site.