Handlebars pagination helper.
Handlebars.registerHelper('pagination', function(currentPage, totalPage, size, options) { | |
var startPage, endPage, context; | |
if (arguments.length === 3) { | |
options = size; | |
size = 5; | |
} | |
startPage = currentPage - Math.floor(size / 2); | |
endPage = currentPage + Math.floor(size / 2); | |
if (startPage <= 0) { | |
endPage -= (startPage - 1); | |
startPage = 1; | |
} | |
if (endPage > totalPage) { | |
endPage = totalPage; | |
if (endPage - size + 1 > 0) { | |
startPage = endPage - size + 1; | |
} else { | |
startPage = 1; | |
} | |
} | |
context = { | |
startFromFirstPage: false, | |
pages: [], | |
endAtLastPage: false, | |
}; | |
if (startPage === 1) { | |
context.startFromFirstPage = true; | |
} | |
for (var i = startPage; i <= endPage; i++) { | |
context.pages.push({ | |
page: i, | |
isCurrent: i === currentPage, | |
}); | |
} | |
if (endPage === totalPage) { | |
context.endAtLastPage = true; | |
} | |
return options.fn(context); | |
}); |
// currentPage = 1, pageCount = 25, size = 5 | |
[1] 2 3 4 5 > | |
// currentPage = 16, pageCount = 25, size = 5 | |
< 14 15 [16] 17 18 > |
{{#pagination currentPage pageCount size}} | |
<div class="pagination"> | |
{{#unless startFromFirstPage}} | |
<a href="#"><</a> | |
{{/unless}} | |
{{#each pages}} | |
{{#if isCurrent}} | |
[<a href="#">{{page}}</a>] | |
{{/if}} | |
{{#unless isCurrent}} | |
<a href="#">{{page}}</a> | |
{{/unless}} | |
{{/each}} | |
{{#unless endAtLastPage}} | |
<a href="#">></a> | |
{{/unless}} | |
</div> | |
{{/pagination}} |
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Can you explain the "options" argument and the logic behind it? |
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hah - nevermind...I see it's a handlebars thing. anyway thanks, this was helpful |
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Hi @trantorLiu thank you so much for posting the handlebar helper, I am trying to use your pagination helper for handlebar. do you know where I should put my data? here is my handlebar.js
could you tell me where I put this code inside pagination ? {{#pagination currentPage pageCount size}} |
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Should also convert totalPage and endPage to numbers when comparing them to prevent white space effects |
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nice work by using
context.endAtLastPage
instead of defining multiple helper functions.