So I have a Javascript script (don't judge it, i've barely used the technology before and this is in need of a tidy!)
$(document).ready(function()
{
retrieveComments();
});
function retriveComments(){
videoID = readCookie("currentVideoID");
$.get("https://gdata.youtube.com/feeds/api/videos/" +videoID+ "/comments", function(d){
$(d).find("entry").each(function(){
var $entry = $(this);
var author = $entry.attr("author");
var comment = $entry.find("content").text();
var html = '<div class="videoComments">';
html += '<p class="author">" + author + "</p>';
html += '<p class="comment"> " + comment + "</p>';
html += '</div>';
};
$('#comments').append(html);
});
And I wish to retrieve the values author and content (comment), and display it on the page. Examples I have found over the course of the day have shown 2 seperate files one with the script in and one a .jsp with the page content in, then class tags (?) corresponding to the last line (in my case #comments).
Seeing as I don't need any other content than just the data I've retrieved and the content I've built in the script, I have this:
<div id="comments"> </div>
but it doesn't display, and I can't see what I have different hin my case.
My whole page looks like:
<script type="text/javascript">
var videoID = readCookie("currentVideoID");
$(document).ready(function()
{
retrieveComments();
});
function retriveComments(){
videoID = readCookie("currentVideoID");
$.get("https://gdata.youtube.com/feeds/api/videos/" +videoID+ "/comments", function(d){
$(d).find("entry").each(function(){
var $entry = $(this);
var author = $entry.attr("author");
var comment = $entry.find("content").text();
var html = '<div class="videoComments">';
html += '<p class="author">" + author + "</p>';
html += '<p class="comment"> " + comment + "</p>';
html += '</div>';
};
$('#comments').append(html);
});
});
</script>
<h1>TEST</h1>
<div id="comments"> </div>
Any ideas how I can get that HTML to display?
Not sure what the readCookie function does (I assume it reads a cookie), but here it is without all the syntax errors and working:
$(document).ready(retriveComments);
function retriveComments() {
$.get("https://gdata.youtube.com/feeds/api/videos/jofNR_WkoCE/comments", function (d) {
$(d).find("entry").each(function (_, entry) {
var author = $(entry).find("author name").text(),
comment = $(entry).find("content").text();
html = '<div class="videoComments">';
html += '<p class="author">' + author + '</p>';
html += '<p class="comment">' + comment + '</p>';
html += '</div>';
$('#comments').append(html);
});
});
}
FIDDLE
Related
I am accessing the following JSON data at:
http://veratech.co.nz/blog/?json=1
When I try to access the "url" property that sits within an array on line 4 of the code below, I get an undefined error. Even though it will appear in console.log (line 13) with console.log(val.attachments[0].url);.
Code below:
$.each(data.posts, function(index, val){
output += '<li>';
output += '<a href="#blogpost" onclick = showPost(' + val.id + ')">';
output += '<img src="' + val.attachments[0].url + '" alt="">';
output += '<h3>' + val.title + '</h3>';
//Here we shorten the paragraph to 60 characters.
var str = val.excerpt;
var paraInfo = str.slice(0, 60);
output += '<p>' + paraInfo + '</p>';
//Closing off the the closing html tags
output += '</a>';
output += '</li>';
console.log(val.attachments[0].url);
});//Go through each post
Advice would be greatly appreciated
I think there's something else wrong.
I downloaded the json manually, and wrote this code:
HTML:
Urls:
<ul id="foo">
</ul>
JavaScript:
function extractUrls(data) {
var $foo = $('#foo');
$.each(data.posts, function (i, p) {
$foo.append($('<li></li>').text(p.attachments[0].url));
});
}
var jsonData = { /* code omitted for brevity */ };
extractUrls(jsonData);
My output was:
Urls:
<ul id="foo">
<li>http://veratech.co.nz/blog/wp-content/uploads/2014/03/martial.jpg</li>
<li>http://veratech.co.nz/blog/wp-content/uploads/2013/12/grave.jpg</li>
<li>http://veratech.co.nz/blog/wp-content/uploads/2013/12/GTA5.jpg</li>
<li>http://veratech.co.nz/blog/wp-content/uploads/2013/10/miyagi.jpg</li>
<li>http://veratech.co.nz/blog/wp-content/uploads/2013/08/htc-box.png</li>
<li>http://veratech.co.nz/blog/wp-content/uploads/2013/08/scaffold1.jpg</li>
<li>http://veratech.co.nz/blog/wp-content/uploads/2013/07/barriera.png</li>
<li>http://veratech.co.nz/blog/wp-content/uploads/2013/06/tv.jpg</li>
</ul>
Note: You should be able to replace the var jsonData = line with:
$.get('http://veratech.co.nz/blog/', { json: 1 }, extractUrls, 'json');
Anyway; can't see what's wrong with your code? Are you sure this is the issue?
PS: I even added the following inside the $.each loop:
if (!p.attachments[0].url) {
alert(p.id + ' has undefined url!');
}
And did not see any alert...
See code running in a jsFiddle here
Hi i am making a WordPress plugin that can bring the names of products from json file if someone writes products name into the search bar. But i think data.json is not getting by Ajax in WordPress. its path defining syntax error i guess.
$.getJSON('data.json', function(data)
following is complete scripting code and it was working fine in PHP website but not in WordPress.:
`jQuery('#search').keyup(function(){
var searchField = jQuery('#search').val();
var myExp = RegExp(searchField,"i");
jQuery.getJSON('data.json', function(data){
var output= '<ul class="SearchResult">';
jQuery.each(data, function(key, val){
if((val.name.search(myExp) != -1) || (val.category.search(myExp) != -1)){
output += '<li>';
output += '<h2>' + val.name + '</h2>';
output += '<img src="images/'+val.image+'.jpg" alt="sorry for image"/>';
output += '<p>' + val.category + '</p>';
output += '</li>';
}
});
output += '</ul>';
$('#update').html(output);
});
});
`
1: the file "data.json" should be in the root of your folder along with the wp-config.php file
2: check your .htaccess if you can access the "data.json" file
3: in wordpress the jquery version, you only can use jQuery instead of $ , so i can see you are using $("#update") , change it to jQuery("#update")
jQuery('#update').html(output);
This question already has answers here:
How to show Page Loading div until the page has finished loading?
(13 answers)
Closed 8 years ago.
I use AJAX requests to retrieve data from mySQL (link), after that I build a sequence of post. Every post has a feature image. So while in process of outputting the posts, the visitor sees 'no image' sign:
.
This lasts for a bit of second, but looks bad.
How can I prevent this sign from showing, or subtitute with a loading spin?
jQuery part for outputting the results
function postsBuilder(posts){
var contents ='';
$.each(posts, function(k, field){
if(field.link[field.link.length-1] == '/') {field.link = field.link.slice(0, field.link.length-1)};
contents += '<div class="post-container">';
//here I output the feature image
contents += "<div class='col_1'><div class='post_image'><img src='/images/icons/id_" + field.id + ".png'></div></div>";
contents += "<div class='col_2'><div class='post_name'><a class='post_name_link' target='blank' href=http://" + field.link + ">" + field.name + "</a></div>";
contents += "<div class='post_link'>" + field.link + "</div>";
contents += "<div class='post_content'>Content: " + field.content + "</div>";
if ( field.video.indexOf('you') >-1 ) {contents += "<div class='post_video'><a data-toggle='lightbox' href=" + field.video + ">Video</a></div>";}
contents += "</div></div><br />";
});
return contents;
}
One of examples when the function is called
$.ajax({cache:false,
url:str,
beforeSend: function() { $('#loadingDiv').show(); },
complete: function() { $('#loadingDiv').hide(); },
dataType :'json'})
.done(function(result){
var i, j, m=0;
var div_content="";
div_content += "<div><b>Category: ".concat(result[0].category).concat("</b></div>");
posts_array = [];
for (i=0,j=result.length; i<j; i+=size) { // slice whole JSON result into portions of at maximum 'size' posts in each
posts_array.push(result.slice(i, i+size));
m++;
}
div_content += postsBuilder(posts_array[0]);
...
$("#content").html(div_content);
});
Use the error event for images:
$(document).on('error', 'img', function () {
$(this).hide();
// or $(this).css({visibility:"hidden"});
});
Check out How to silently hide "Image not found" icon when src source image is not found
I would like to achieve 2 things with this Code I have been working on so not sure if to separate the Questions:
JS:
function listPosts(data) {
postlimit =
var output='<ul data-role="listview" data-filter="true">';
$.each(data.posts,function(key,val) {
output += '<li>';
output += '<a href="#devotionpost" onclick="showPost(' + val.id + ')">';
output += '<h3>' + val.title + '</h3>';
output += '<p>' + excerpt + '</p>';
output += '</a>';
output += '</li>';
}); // go through each post
output+='</ul>';
$('#postlist').html(output);
} // lists all the posts
Questions:
1: I would like to limit the number of Dynamic List Posts returned to 8
2: While I limit the displayed items, I want to add a 'More...' text at the bottom so another set of 8 items is appended to already displayed list.
I am already trying out some codes but was hoping to get some guidance
function listPosts(data, postlimit) {
var $output = $('<ul class="posts" data-role="listview" data-filter="true">');
$.each(data.posts,function(key, val) {
$("<li>", {id: "post_" + val.id})
.append([
$("<h3>", {text: val.title}),
$("<p>", {text: val.excerpt})
])
.appendTo($output);
return (postlimit-- > 1);
});
$('#postlist').empty().append($output);
}
// exemplary delegated event handler
$(document).on("click", "ul.posts h3", function () {
$(this).show();
});
later ...
listPosts(data, 8);
Notes:
from $.each() you can return true or false. If you return false, the loop stops.
Try not to build HTML from concatenated strings. This is prone to XSS vulnerabilities that are easy to avoid. jQuery gives you the tools to build HTML safely.
Generally, for the same reason, try to avoid working with .html(), especially if you already have DOM elements to work with.
Don't use inline event handlers like onclick. At all. Ever.
I am answering you on basis of pure logic and implementation of logic. there could be API stuff for it , but I don't really know. Secondly; It would be a good solution to find some jQuery plugin if you don't have any problems with using jQuery.
call the function onMoreClick() upon clicking the More... html item
var end = 8;
var start = 1;
function onMoreClick()
{
start = end
end = end+8;
listPosts(data)
}
function listPosts(data) {
postlimit =
var output='<ul data-role="listview" data-filter="true">';
var i = start;
$.each(data.posts,function(key,val) {
if(i<end && i >=start){
output += '<li>';
output += '<a href="#devotionpost" onclick="showPost(' + val.id + ')">';
output += '<h3>' + val.title + '</h3>';
output += '<p>' + excerpt + '</p>';
output += '</a>';
output += '</li>';
i++;
}
}); // go through each post
output+='</ul>';
$('#postlist').html(output);
} // lists all the posts
I am working on a website that uses infinite scroll. There is a function called is_element_in_view() that gets executed on these 3 events:
scroll
load
resize
The function does exactly what it's called, it checks to see if an element with a loading gif image is in view and if so it fires an ajax request to get content from the server.
The server sends back a json object that looks like this:
[{
"url": "\/embed\/182926\/some-slug",
"thumb": "http:\/\/cdn.site.com\/91\/26\/a62c1ad74327321dab78bb194c130da5.jpg",
"type": "video",
"is_original": false,
"is_prank_news": false,
"title": "Hello World",
"description": "\t<p>Enjoy this video!<\/p>",
"teaser": "Click Me!",
"finder": "Found by <strong>Jim<\/strong> yesterday",
"likes": "2 likes",
"ad_img": null,
"media_stats": "<div class=\"media-status\">2000 views<\/div>"
},
more objects...]
There's only one object in this response for clarity sake but in reality I get back 20. This is how I'm building out the html from the json data:
$.ajax({
url: '/some/ajax/url',
type: 'get',
data: 'somedata',
dataType: 'json',
success: function(response) {
if(!$.isEmptyObject(response)) {
for(var i = 0; i < response.length; i++) {
if(response[i]) {
var item = response[i];
var title = item.title.replace(/\\"/g, '"');
var media_label = '';
var item_description_teaser = '';
var likes = '';
var ad_image = '';
var media_stats = '';
if(item.description) {
// description
item_description_teaser = '<div class="description">' + item.description.replace(/\\"/g, '"');
// teaser
item_description_teaser += (item.teaser) ? ''+ item.teaser.replace(/\\"/g, '"') +'<img src="images/teaser-arrow.png" alt="" /></div>' : '</div>';
}
// media label
if(item.type == 'article' && item.is_prank_news || item.is_original && item.is_prank_news) {
media_label = '<span class="media-label prank-news-network">Prank</span>';
}
else {
if(item.type == 'article') {
media_label = '<span class="media-label article">Article</span>';
}
else if(item.is_original) {
media_label = '<span class="media-label original">Original</span>';
}
}
// likes
if(!settings.hide_likes) {
likes = '<span class="likes">' + item.likes + '</span> | ';
}
// ad image
if(item.ad_img) {
ad_image = '<img src="'+ item.ad_img +'" alt="" class="ad-img" />';
}
block += '<article class="block">' +
'<div class="inner-left">' +
media_label +
'<a href="'+ item.url +'" title="" class="thumb">' +
'<img src="'+ item.thumb +'" alt="" width="198" height="111" />' +
'</a>' +
'</div>' +
'<div class="inner-right">' +
'<a href="'+ item.url +'" title="" class="title">' +
title +
'</a>' +
item_description_teaser.replace(/\\"/g, '"') +
'<div class="media-stats">' +
likes +
'<span class="finder">'+ item.finder.replace(/\\"/g, '"') +'</span>' +
'</div>' +
ad_image +
'</div>' +
item.media_stats +
'</article>';
}
}
$('#content').append('<div class="page page-'+ page_num +'">' + block + '</div>');
// update page count
page_num++;
// clear previous listings
block = '';
}
else {
$('#content').append('<div class="page page-1"><p class="nothing-to-show">Nothing found...</p></div>');
}
},
error: function() {
alert('error');
}
});
As you can see I put everything in one giant string stored inside the variable block. I append data to this string with every loop and append it to the page outside the loop at the end.
I feel like there is a faster way to build html from js. I read somewhere a while ago that building giant strings like I'm doing isn't as efficient as some other method the article described that I forgot. So what's the faster way to do this?
Store the blocks in an array say blocks, then
$('#content').append(blocks.join(""));
Edit: that wasn't what the OP wanted. I guess the problem is appending the stuff each time the event is triggered.
I'd say to create a DocumentFragment, put the new stuff in it, then appending to $("#content"). Unfortunately, DocumentFragments don't support innerHTML.
So, create a dummy element, fill it and then put its child nodes into the container:
var dummy = $("<div>").html(block), content = $("#content");
$.each(dummy.children(), function(i, c) {content.append(c);});
Adding html elements to the DOM represents a big performance penalty so it is better to create a big string and append it at the end, this post explains it really well
For most of your uses, the method of creating one really long string and appending it at the end will be the best choice, as it makes the best use of the trade offs of code legibility, ease of programming, and speed.
You could have your server return the values already marked-up in HTML, then:
$('#content').append( response );
You can then handle all of your looping and filtering server side, cutting down on the amount JS in your document.