// Initialize the Plugin somewhere in your javascript, doesn't have to be on the window
var pageOptions = { cache: true, maxCacheLength: 15, onUpdateCachedValues: _updateCachedFormValues };
window.PjaxPage = window.PjaxPage || Pjax.New(pageOptions);

// there are 2 approaches, but you will most likely implement both:

// 1 - setup some global listeners to always perform the Plugin call
// pure javascript
var links = document.querySelectorAll('a[data-pjax-page]');

for(var i = 0, len = links.length; i < len; i++ ) {
    links[i].onclick = function(e) {
    
        var container = // find container
    
        PjaxPage.Load(e, this.href, this, container, null);
    }
}
// Jquery
$(document).on('click', 'a[data-pjax-page]', function(e) {
    var container = $(document).find(this).closest('[data-pjax-page-ct]');

    PjaxPage.Load(e, this.href, this, container[0], null);
});

// 2 - subscribe each request individually
// pure javascript
var triggerElement = // find link
var url = // get/set url
var container = // find container
var additionalHeaders = {};
additionalHeaders["X-CSRF-Token"] = // token

PjaxPage.Load(e, url, triggerElement, container, { headers: additionalHeaders });

Pjax.New(options)

options - is any options that you may wish to override from the defaults, use {} if none.

PjaxPlugin.Load(e, url, el, ct, oneTimeOptions)

e              - is the click event of the anchor tag, needed to preventDefault operations
url            - the url to load
el             - the element that triggered the Load
ct             - the container element whose content will be replaced
oneTimeOptions - this can contain any options that you may want to override including the 
                 default used when calling Pjax.New, but just for this request, in order to handle one off 
                 situations without the need to initialize another plugin instance.

PjaxPlugin.Submit(e, url, el, ct, oneTimeOptions)

e              - is the click event of the anchor tag, needed to preventDefault operations
url            - the url to load
el             - the element that triggered the Load
ct             - the container element whose content will be replaced
oneTimeOptions - this can contain any options that you may want to override including the 
                 default used when calling Pjax.New, but just for this request, in order to handle one off 
                 situations without the need to initialize another plugin instance.