I need to dynamically insert an element into an existing list of blog posts.
Here is an example of the HTML:
<div id="page">
<div id="post">Post Content</div>
<div id="post">Post Content</div>
<div id="post">Post Content</div>
<div id="post">Post Content</div>
<!---- Dynamic Post Inserted Here--->
<div id="post">Post Content</div>
<div id="post">Post Content</div>
</div>
I've created a for loop that iterates through the posts and returns the location, but the location returned is an integer so I can't append the new post to that variable. So what is the best way to append the item to my current post list?
I don't have the exact function in front of me but this is essentially what i'm doing:
var post = docuemnt.getElementById('post');
var page = docuemnt.getElementById('page');
var pc = 0;
var insert = 5;
var newPost = "new post content";
for(post in page){
if(pc == insert){
**append new post content after this post**
}else{
pc++;
}
}
If you were using jQuery, this would be incredibly easy.
$('#post4').after('<div id="post5">new post content</div>');
If you want to do it in pure JavaScript, then take a look at this question. The basic idea is:
referenceNode.parentNode.insertBefore(newNode, referenceNode.nextSibling);
In your case, you'd need to create a div node and append to the document directly.
var newpost = document.createElement('div');
newpost.id = 'post5';
newpost.innerText = newpost.textContent = "new post content";
var post = document.getElementById('post4');
post.parentNode.insertBefore(newpost, post.nextSibling);
If you are getting an integer, have the div id be the index. That way you can use document.getElementById('post'+id).innerHTML to append.
Your approach is all wrong, doing a for each on an element won't give you its child nodes but its property keys. You can use getElementsByTagName or querySelector to accomplish your goal
var posts = docuemnt.getElementById('page').getElementsByTagName('div');
var insert = 4;
var newPost = "new post content";
var div = document.createElement('div');
div.appendChild(document.createTextNode(newPost ));
posts[insert].parentNode.insertBefore(div, posts[insert]);//index are zero based so element 4 is actually the 5th element
or
var insert = 5;
var post = docuemnt.querySelector('#page > div:nth-child('+insert+')');//nth child index is one based
var newPost = "new post content";
var div = document.createElement('div');
div.appendChild(document.createTextNode(newPost ));
post.parentNode.insertBefore(div, post);
https://developer.mozilla.org/en-US/docs/DOM/Document.querySelector
https://developer.mozilla.org/en-US/docs/DOM/Node.insertBefore
https://developer.mozilla.org/en-US/docs/DOM/document.getElementsByTagName
Your can create jtag for new post div tag and call .dom() function to receive div element. Try Jnerator library.
function addPost() {
var lastPostElement = page.lastChild;
var count = page.childNodes.length;
var postText = tagPost.value;
var jtag = $j.div({ id: 'post' + count, child: postText });
var newPostElement = jtag.dom();
page.insertBefore(newPostElement, lastPostElement);
}
See an example here: http://jsfiddle.net/jnerator/5nCeV/
Related
I have a form that has multiple fields all with the same class. These are populated with URL's that follow the same structure. I am trying to extract the same section from each URL. So far var res = x.split('/')[5]; will achieve this but only for the first URL. I can also use var x = document.querySelectorAll(".example") to change all the url's but I cannot find the correct way to combine both of these function. so far my code looks like this:
script>
function myFunction() {
var x = document.querySelectorAll(".example").innerHTML;
var res = x.split('/')[5];
var i;
for (i = 0; i < x.length; i++) {
x[i].innerHTML = res;
}
}
</script>
I have looked around but can't find a solution that fits. Thanks in advance for your help.
So loop over the HTML Collection, this is making assumptions based on code.
// Find all the elements
var elems = document.querySelectorAll(".example")
// loop over the collection
elems.forEach(function (elem) {
// reference the text of the element and split it
var txt = elem.innerHTML.split("/")[5]
// replace the text
elem.innerHTML = txt
})
<div class="example">1/2/3/4/5/a</div>
<div class="example">1/2/3/4/5/b</div>
<div class="example">1/2/3/4/5/c</div>
<div class="example">1/2/3/4/5/d</div>
<div class="example">1/2/3/4/5/e</div>
<div class="example">1/2/3/4/5/f</div>
in DOM I already have a wrapper
<div id="wrapper"></div>
which I need to fill with bunch of divs, where each will represent new category.
Each category will be then filled with various cards representing items of that category. Like this:
<div id="wrapper">
<div data-category="puppy">
Dynamically created category wrapper
<div class="puppy1">...</div>
<div class="puppy2">...</div>
</div>
<div data-category="cat">
...
</div>
</div>
I use following code to create and fill category, but I always end up either having empty category or having a string inside reprenting the html.
var categoryWrapper = document.createElement("div");
categoryWrapper.setAttribute("data-category", key);
categoryWrapper.innerHtml = htmlString;
Here is a fiddle demo of my issue.
https://jsfiddle.net/uuqj4ad5/
I'll be grateful for a help.
There is a typo, innerHml should be innerHTML(Javascript object properties are case sensitive) otherwise it simply add an additional property and nothing gets happened.
categoryWrapper.innerHTML = htmlString;
var htmlString = "<div class='card'><div class='cardImg'><img src='http://cdn.cutestpaw.com/wp-content/uploads/2012/07/l-Wittle-puppy-yawning.jpg' alt='Puppy'></div><div class='cardContent'><div class='cardInfo'><p>Puppy Yawning</p></div><div class='cardDesc'><p>Awww!</p></div></div></div>";
var outerWrapper = $("#wrapper");
var categoryWrapper = document.createElement("div");
categoryWrapper.innerHTML = htmlString;
outerWrapper.append(categoryWrapper);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div>
<h3>
Under this title various categories should be dynamically created
</h3>
<div id="wrapper">outerWrapper waiting for dynamic data...</div>
</div>
FYI : If you want to remove the existing content then use html() method instead of append() method.
innerHtml
should be
innerHTML
Javascript is case sensitive
If you are using jQuery why do you want to mix jQuery and Vanilla JS.
var outerWrapper = $("#wrapper");
// I created new categoryWrapper object
var categoryWrapper = $('<div/>', {
html: htmlString
});
debugger;
// WHen I have the category filled with inner data, I will append it into outerwrapper
outerWrapper.append(categoryWrapper);
jsFiddle
Checkout my fiddle:-
https://jsfiddle.net/dhruv1992/1xg18a3f/1/
your js code should look like this
// This is dynamically filled html template. The data comes from some JSON.
var htmlString = "<div class='card'><div class='cardImg'><img src='http://cdn.cutestpaw.com/wp-content/uploads/2012/07/l-Wittle-puppy-yawning.jpg' alt='Puppy'></div><div class='cardContent'><div class='cardInfo'><p>Puppy Yawning</p></div><div class='cardDesc'><p>Awww!</p></div></div></div>";
// This outer wrapper will in the end contain few categories
var outerWrapper = $("#wrapper");
outerWrapper.append('<div>'+htmlString+'</div>')
I'm trying to learn HTML and Javascript/jQuery. If I have a container which holds a title, an image, a description and a number, then I want to create a new container with the exact same format (except the values will be different), how is this commonly done?
This is an example of the format I'm looking for in each item.
<li>
<div>
<div>
Image Name
</div>
<div>
<a href=URL>
<img src='image_url'>
</a>
</div>
<div>
Description
</div>
<div>
num_comment Comments
</div>
</div>
</li>
Do I just create a string and concatenate with the actual values for the image, then add that string to some variable I've saved called html_content, and then set the html value to html_content? Is that the common way of doing this or is there a better way?
EDIT
To give a better idea of what I'm currently doing, here's the javascript:
var html1 = '<li><div><div>';
var html2 = '</div><div><a href="';
var html3 = '"><img src="';
var html4 = '"></a></div><div>';
var html5 = '</div><div>';
var html6 = '</div></div></li>';
function render(pics){
for (var i in pics){
html = html + html1 + pics[i].name + html2 + pics[i].image_url + html3 + ...
};
$('pics').html(html);
}
In jQuery you just have to use the append() function to add on to something.
You could do something like...
$('select element').append('<li><div>....etc.');
and where you want a different value you can use a variable.
You can use .clone() and create a copy of this, then iterate through the cloned object and change what you need:
var $objClone = $("li").clone(true);
$objClone.find("*").each(function() {
//iterates over every element. customize this to find elements you need.
});
To change the image source you can do:
$objClone.find("img").attr("src", "new/img/here.jpg");
Fiddle demoing the concept: http://jsfiddle.net/H9DnA/1/
You may find it useful to explore some of the JavaScript templating libraries. The essential idea is that you create a template of your markup:
<li>
<div>
<div>
{{name}}
</div>
<div>
<a href="{{url}}">
<img src="{{imageUrl}}">
</a>
</div>
<div>
{{description}}
</div>
<div>
{{comments}}
</div>
</div>
</li>
Then you merge it against some associated matching object and insert it into your document:
{ name: 'Image Name',
url: 'http://example.com',
imageUrl: 'http://example.com/image.jpg',
description: 'Description',
comments [ { text: 'Comment' } ]
}
function render(pics)
{
var theList = document.getElementByid("LIST ID");
for (var i in pics){
var listItem = document.createElement('li'); // Create new list item
var nameDiv = document.createElement('div'); // Create name DIV element
nameDiv.innerHTML = pics[i].name; // Insert the name in the div
var img = document.createElement('img'); // Create Img element
img.setAttribute('src',pics[i].src); // Assign the src attribute of your img
var imgDiv = document.createElement('div'); // Create Img Div that contains your img
imgDiv.appendChild(img); // Puts img inside the img DIV container
var descDiv = document.createElement('div'); // Create Description DIV
descDiv.innerHTML = pics[i].description; // Insert your description
listItem.appendChild(nameDiv); // Insert all of you DIVs
listItem.appendChild(imgDiv); // inside your list item
listItem.appendChild(descDiv); // with appropriate order.
theList.appendChild(listItem); // Insert the list item inside your list.
}
}
I think this will work just fine:
$('#button').click(function () {
var html1 = '<li><div><div>';
var html2 = '</div><div><a href="';
var html3 = '"><img src="';
var html4 = '"></a></div><div>';
var html5 = '</div><div>';
var html6 = '</div></div></li>';
function render(pics){
for (var i in pics){
html = html + html1 + pics[i].name + html2 + pics[i].image_url + html3 + ...
$("ul").append(html);
}
}
// call render
});
I didn't do a test run on your code so there might be an error somewhere. My tweak adds this line $("ul").append(html); inside your loop
I'm trying to create a simple javascript game for college and am having trouble getting what i want to display on screen.
my script is as follows:
var qArray = new Array();
qArray[0] = {image:"Images/q1.png"};
qArray[1] = {image:"Images/q2.png"};
qArray[2] = {image:"Images/q3.png"};
qArray[3] = {image:"Images/q4.png"};
qArray[4] = {image:"Images/q5.png"};
var count = 0;
var question = qArray.splice(count,1);
when i use this i get "undefined":
document.getElementById("question").innerHTML = question.image;
and when i use this i get nothing:
document.getElementById("question").src = question.image;
my html is just a simple div like so:
<div id = "question" align = "center">
</div>
i need to have the "count" variable because it increments to show the next image for the next question
if anyone could help that would be great
Here is a working Fiddle. qArray.splice() doesn't work because it actually removes that element from the array and returns a new array while you were just looking for a specific index in the array (not to mention you just deleted the element you were looking for)
This works. I used a random imgur image to show that it does indeed load.
<html><head></head><body>
<img src="" id="question"></img>
<script type="text/javascript">
var qArray = new Array();
qArray[0] = {image:"http://i.imgur.com/pGpmq.jpg"};
qArray[1] = {image:"Images/q2.png"};
qArray[2] = {image:"Images/q3.png"};
qArray[3] = {image:"Images/q4.png"};
qArray[4] = {image:"Images/q5.png"};
var count = 0;
var question = qArray[count];
document.getElementById('question').src = question.image;
</script>
</body>
</html>
I'm trying to get this JavaScript working:
I have an HTML email which links to this page which contains a variable in the link (index.html?content=email1). The JavaScript should replace the DIV content depending on what the variable for 'content' is.
<!-- ORIGINAL DIV -->
<div id="Email">
</div>
<!-- DIV replacement function -->
<script type="text/javascript">
function ReplaceContentInContainer(id,content) {
var container = document.getElementById(id);
container.innerHTML = content;
}
</script>
<!-- Email 1 Content -->
<script ="text/javascript">
var content = '<div class="test">Email 1 content</div>';
ReplaceContentInContainer('Email1',content);
}
</script>
<!-- Email 2 Content -->
<script ="text/javascript">
var content = '<div class="test">Email 2 content</div>';
ReplaceContentInContainer('Email2',content);
}
</script>
Any ideas what I've done wrong that is causing it not to work?
Rather than inserting the element as text into innerHTML create a DOM element, and append it manually like so:
var obj = document.createElement("div");
obj.innerText = "Email 2 content";
obj.className = "test"
document.getElementById("email").appendChild(obj);
See this working here: http://jsfiddle.net/BE8Xa/1/
EDIT
Interesting reading to help you decide if you want to use innerHTML or appendChild:
"innerHTML += ..." vs "appendChild(txtNode)"
The ReplaceContentInContainer calls specify ID's which are not present, the only ID is Email and also, how are the two scripts called, if they are in the same apge like in the example the second (with a corrected ID) would always overwrite the first and also you declare the content variable twice which is not permitted, multiple script blocks in a page share the same global namespace so any global variables has to be named uniquely.
David's on the money as to why your DOM script isn't working: there's only an 'Email' id out there, but you're referencing 'Email1' and 'Email2'.
As for grabbing the content parameter from the query string:
var content = (location.search.split(/&*content=/)[1] || '').split(/&/)[0];
I noticed you are putting a closing "}" after you call "ReplaceContentInContainer". I don't know if that is your complete problem but it would definitely cause the javascript not to parse correctly. Remove the closing "}".
With the closing "}", you are closing a block of code you never opened.
First of all, parse the query string data to find the desired content to show. To achieve this, add this function to your page:
<script type="text/javascript">
function ParseQueryString() {
var result = new Array();
var strQS = window.location.href;
var index = strQS.indexOf("?");
if (index > 0) {
var temp = strQS.split("?");
var arrData = temp[1].split("&");
for (var i = 0; i < arrData.length; i++) {
temp = arrData[i].split("=");
var key = temp[0];
var value = temp.length > 0 ? temp[1] : "";
result[key] = value;
}
}
return result;
}
</script>
Second step, have all possible DIV elements in the page, initially hidden using display: none; CSS, like this:
<div id="Email1" style="display: none;">Email 1 Content</div>
<div id="Email2" style="display: none;">Email 2 Content</div>
...
Third and final step, in the page load (after all DIV elements are loaded including the placeholder) read the query string, and if content is given, put the contents of the desired DIV into the "main" div.. here is the required code:
window.onload = function WindowLoad() {
var QS = ParseQueryString();
var contentId = QS["content"];
if (contentId) {
var source = document.getElementById(contentId);
if (source) {
var target = document.getElementById("Email");
target.innerHTML = source.innerHTML;
}
}
}
How about this? Hacky but works...
<!-- ORIGINAL DIV -->
<div id="Email"></div>
<script type="text/javascript">
function ReplaceContentInContainer(id,content) {
var container = document.getElementById(id);
var txt = document.createTextNode(content);
container.appendChild(txt);
}
window.onload = function() {
var args = document.location.search.substr(1, document.location.search.length).split('&');
var key_value = args[0].split('=');
ReplaceContentInContainer('Email', key_value[1]);
}
</script>