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Working prototype of infinite scroll.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| --- | ||
| --- | ||
| { | ||
| "posts" : [ | ||
| {% for post in site.categories.blog %} | ||
| "{{ post.url }}"{% unless forloop.last %},{% endunless %} | ||
| {% endfor %} | ||
| ] | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| $(function() { | ||
|
|
||
| var postURLs, | ||
| isFetchingPosts = false, | ||
| shouldFetchPosts = true, | ||
| postsToLoad = $(".post-list").children().length, | ||
| loadNewPostsThreshold = 3000; | ||
|
|
||
| // Load the JSON file containing all URLs | ||
| $.getJSON('/all-posts.json', function(data) { | ||
| postURLs = data["posts"]; | ||
| console.log(postsToLoad); | ||
|
|
||
| // If there aren't any more posts available to load than already visible, disable fetching | ||
| if (postURLs.length <= postsToLoad) | ||
| disableFetching(); | ||
| }); | ||
|
|
||
| // If there's no spinner, it's not a page where posts should be fetched | ||
| if ($(".infinite-spinner").length < 1) | ||
| shouldFetchPosts = false; | ||
|
|
||
| // Are we close to the end of the page? If we are, load more posts | ||
| $(window).scroll(function(e){ | ||
| if (!shouldFetchPosts || isFetchingPosts) return; | ||
|
|
||
| var windowHeight = $(window).height(), | ||
| windowScrollPosition = $(window).scrollTop(), | ||
| bottomScrollPosition = windowHeight + windowScrollPosition, | ||
| documentHeight = $(document).height(); | ||
|
|
||
| // If we've scrolled past the loadNewPostsThreshold, fetch posts | ||
| if ((documentHeight - loadNewPostsThreshold) < bottomScrollPosition) { | ||
| fetchPosts(); | ||
| } | ||
| }); | ||
|
|
||
| // Fetch a chunk of posts | ||
| function fetchPosts() { | ||
| // Exit if postURLs haven't been loaded | ||
| if (!postURLs) return; | ||
|
|
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| isFetchingPosts = true; | ||
|
|
||
| // Load as many posts as there were present on the page when it loaded | ||
| // After successfully loading a post, load the next one | ||
| var loadedPosts = 0, | ||
| postCount = $(".post-list").children().length, | ||
| callback = function() { | ||
| loadedPosts++; | ||
| var postIndex = postCount + loadedPosts; | ||
|
|
||
| if (postIndex > postURLs.length-1) { | ||
| disableFetching(); | ||
| return; | ||
| } | ||
|
|
||
| if (loadedPosts < postsToLoad) { | ||
| fetchPostWithIndex(postIndex, callback); | ||
| } else { | ||
| isFetchingPosts = false; | ||
| } | ||
| }; | ||
|
|
||
| fetchPostWithIndex(postCount + loadedPosts, callback); | ||
| } | ||
|
|
||
| function fetchPostWithIndex(index, callback) { | ||
| var postURL = postURLs[index]; | ||
|
|
||
| $.get(postURL, function(data) { | ||
| $(data).find(".blog-post").appendTo(".post-list"); | ||
| console.log(postURL); | ||
| console.log($(".post-list").children().length); | ||
| callback(); | ||
| }); | ||
| } | ||
|
|
||
| function disableFetching() { | ||
| shouldFetchPosts = false; | ||
| isFetchingPosts = false; | ||
| $(".infinite-spinner").fadeOut(); | ||
| } | ||
|
|
||
| }); |