Created
April 23, 2015 20:47
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Pure JavaScript paging. Makes no assumptions about how you want your page structured. Just new it up, bind it, and go.
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(function() { | |
"use strict"; | |
window.Pager = function (itemSelector, pageSize) { | |
this.ItemSelector = itemSelector; | |
this.PageSize = pageSize; | |
this.CurrentPage = 1; | |
this.ItemCount = $(itemSelector).length; | |
this.PageCount = Math.round(this.ItemCount / pageSize + 0.5); | |
this.Selectors = { | |
PageCount: null, | |
CurrentPage: null, | |
PreviousPage: null, | |
NextPage: null | |
}; | |
this.HasPreviousPage = function () { | |
return this.CurrentPage > 1; | |
}; | |
this.HasNextPage = function () { | |
return this.CurrentPage < this.PageCount; | |
}; | |
this.PageFor = function (index) { | |
return 1 + Math.round(index / this.PageSize - 0.5); | |
}; | |
this.Bind = function (selectors) { | |
this.Selectors = selectors; | |
var self = this; | |
$(this.Selectors.PreviousPage).on("click", function () { | |
self.GotoPreviousPage(); | |
}); | |
$(this.Selectors.NextPage).on("click", function () { | |
self.GotoNextPage(); | |
}); | |
this.Update(); | |
}; | |
this.Update = function () { | |
$(this.Selectors.PageCount).text(this.PageCount); | |
$(this.Selectors.CurrentPage).text(this.CurrentPage); | |
$(this.Selectors.PreviousPage).prop("disabled", !this.HasPreviousPage()); | |
$(this.Selectors.NextPage).prop("disabled", !this.HasNextPage()); | |
var $items = $(this.ItemSelector); | |
for (var i = 0; i < $items.length; i++) { | |
var $item = $($items[i]); | |
if (this.PageFor(i) === this.CurrentPage) { | |
$item.css("display", ""); | |
} else { | |
$item.css("display", "none"); | |
} | |
} | |
}; | |
this.GotoPreviousPage = function () { | |
this.CurrentPage = this.CurrentPage - 1; | |
this.Update(); | |
}; | |
this.GotoNextPage = function () { | |
this.CurrentPage = this.CurrentPage + 1; | |
this.Update(); | |
}; | |
}; | |
})(); |
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