Develop Reference

How should I not load the images with broken link?

I'm working on a feature, in which images are being rendered from the servers. I was working on aligning the images but found that there is a lot of white space. This was the reason, due to loading of images with a broken link.
HTML :
<div class="image-result" *ngIf="Display('images')">
<div class="col-sm-3" *ngFor="let item of items$|async">
<a href="{{item.link}}">
<figure>
<img class="res-img" src="{{item.link}}" onerror="this.style.display='none'">
</figure>
</a>
</div>
</div>
I have used onerror="this.style.display='none'" to solve the problem, but leaves a lot of white space when images are being loaded from the server. Is there any solution for it like to remove img tag whenever a image with a broken link has been detected ? I have gone through stackoverflow before asking question, but I'm not able to solve this problem. It would be great if someone can help me out. Thanks! :)

Instead of onerror="this.style.display='none'" to hide an image, you can use onerror="this.parentNode.removeChild(this)" to remove the image tag altogether.
If you want to remove the entire column, in your specific case you can do the following.
var colEl = this.parentNode.parentNode.parentNode;
colEl.parentNode.removeChild(colEl);
Or, in your HTML:
onerror="this.parentNode.parentNode.parentNode.parentNode.removeChild(this.parentNode.parentNode.parentNode)"
You should probably move that to some JavaScript function and attach your handler by saying
element.addEventListener('error', function() { /* ... */ });
References: parentNode, removeChild, addEventListener.
If you don't care about supporting Internet Explorer, you can also use remove instead of doing the parentNode.removeChild trickery. That would be particularly useful for reducing the code length in your onerror attribute, would you choose to use it, but I don't recommend that.

A more angular-way of doing this would be:
<img src="{{item.link}}" (error)="item.brokenImage=true">
So you would have:
<div class="col-sm-3" *ngFor="let item of items$|async">
<div *ngIf="!item.brokenImage">
<a href="{{item.link}}">
<figure>
<img class="res-img" [src]="item.link" (error)="item.brokenImage=true">
</figure>
</a>
</div>
</div>
You need to listen for the error event of the image element, and assign a boolean on whether the image loaded successfully or not. Then, depending on that value angular will either show the image with the div, or remove it from the DOM.

Google Tag Manager - CSS selector challenge

I am trying to get the URL of a link in the source code. The challenge is that the URL is hidden behind a image, and thus only letting me fetch the image-url.
I've been trying to figure a way to solve this issue by using the new CSS selector in the trigger system and also made a DOM variable that should get the URL when the image is clicked. There can also be multiple downloads.
Here is an example of what I am trying to achieve:
<div>
<div class="download">
<a href="example.com/The-URL-I-Want-to-get-if-top-image-is-clicked.pdf" target="_blank">
<img src="some-download-image.png"/></a>
<div class="download">
<a href="example.com/Another-URL-I-Want-to-get-if-middle-image-is-clicked.pdf" target="_blank">
<img src="some-download-image.png"/></a>
<div class="download">
<a href="example.com/Last-URL-I-Want-to-get-if-bottom-image-is-clicked.pdf" target="_blank">
<img src="some-download-image.png"/></a>
</div>
</div>
There are much code above and below this snippet, but with the selector it should be fairly easy to get the information I want. Only that I don't.
If anyone have met this wall and solved it, I really would like to know how. :)

This is one possible solution. So as I understand it, you would like to grab the anchor element's href attribute when you click the "download" image.
A Custom Javascript variable would need to be created so that you can manipulate the click element object:
function(){
var ec = {{Click Element}};
var href = $(ec).closest('a').attr('href');
return href;
}
So you will need to do your due diligence and add in your error checking and stuff, but basically this should return to you the href, and then you will need to parse the string to extract the portion that you need.

How to edit text for a link that does not have an ID using Javascript

I want to change the text of a link using javascript. The problem is this particular link does not have an id. I am unable to change the html, as this is a SharePoint page, and this particular link is created by a page layout, which I do not have access to. Using IE Developer Tools, I see that the HTML surrounding the link is this:
<span id="DeltaPlaceHolderPageTitleInTitleArea">
<span>
<a href="#ctl00_PlaceHolderPageTitleInTitleArea_ctl00_SkipLink">
<img width="0" height="0" style="border-width: 0px;" alt="Skip Navigation Links" src="" /></a>
<span>
<a title="State-Compliance" href="/sites/tax/Compliance/SitePages/State-Compliance.aspx">State-Compliance</a>
</span>
<a id="ctl00_PlaceHolderPageTitleInTitleArea_ctl00_SkipLink"></a>
</span>
The link I wish to change is the second one, the one with "State-Compliance" for the tooltip.
I looked at jQuery, and found I could use $('#DeltaPlaceHolderPageTitleInTitleArea').find("a").text("Test"); to change the text, but it changes the text of all three links. How can I change just the one? Do I need to iterate through the three, or is there an easier way of getting the link I wish to change?
Sorry if this is a stupid question, I'm a c# developer, and this is my first experience using javascript.
Let me know if you need more information.
Warren

Use .eq():
$('#DeltaPlaceHolderPageTitleInTitleArea').find("a").eq(1).text("Test");
jsFiddle example

How about this, using the attribute equals selector:
$('#DeltaPlaceHolderPageTitleInTitleArea a[title="State-Compliance"]')

How to populate href value from src value of an image?

I know this is super simple, but I can't work it out (I'm a designer).
I want to simply populate the href attribute value of the <a> tag, with the value of the src attribute of the <img> tag. So the image links to itself basically.
the image src will be updated through a super simple CMS and I want the link to dynamically update, instead of the user having to update the URL also.
I tried something like this, but it didn't work.
<a rel="lightbox[job1]" href="()document.getElementById("gal1_img1").src">
<img id="gal1_img1" src="images/gallery/job1/image-1.jpg">`enter code here`
</a>

You cannot inline JavaScript inside attributes the way you have currently. You can add a script to the page to do this:
<a id="link" rel="lightbox[job1]" href="#">
<img id="gal1_img1" src="images/gallery/job1/image-1.jpg">`enter code here`
</a>
<script>
document.getElementById("link").href = document.getElementById("gal1_img1").src;
</script>

try this as your <a>'s href:
href="javascript:window.location=this.getElementsByTagName('img')[0].src;"
Assuming there's only ever one image inside these <a> tags, this should work for anyone who's NOT running with javascript disabled.

try this.
var att = $('#gal1_img1').attr('src');
$("a[rel*='lightbox[job1]']").attr('href',att);

Url Hash with Html Base Tag

window.location.hash
When using a link for a javascript action, I usually do something like this:
Link Text
That way, when someone clicks the link before the page loads nothing terrible happens.
Html Base Tag
On my current project I use this same construct, but with a base tag:
<html>
<head>
<base href="http://example.com/" />
</head>
<body>
Link Text
</body>
</html>
However, if the page url is:
http://example.com/dir/page
clicking the link navigates to
http://example.com/#
rather than
http://example.com/dir/page#
How can I fix this?

Either remove your base tag or change your href attributes to be fully qualified. What you are observing is the intended behavior when you mix base with a elements.

If you're inclined to use an a tag another solution is to not use # as the href target (when you don't specify one it causes a jump to the top of the page which I find undesirable). What you can do is:
Some Link that Goes nowhere
Really though, unless you are doing something that requires that to be an a tag a span would be your best bet:
CSS:
.generic_link {
text-decoration:underline;
}
.generic_link:hover {
text-decoration:none;
}
HTML:
<span class="generic_link">Something that really isn't a link</span>

If there's no URL that is suitable for a non-javascript user, then don't use an <a>. <a> tags are for links to other pages.
Any visible HTML element can have an onclick and won't have this problem you describe.

Return false on the onclick event to disable the link:
Link Text
(This is just an example of how you’d do it inline. But try to avoid inline declarations and use techniques of progressive enhancements.)

<html>
<head>
<base href="http://example.com/" />
</head>
<body>
Link Text
</body>
</html>

I had the same issue in the past.
I had a link that i wanted to be empty, to link to the current page.
Without the base html element this will be just an a element with href="#".
My example without using the base html element,
<li>
<div>The text of my Link</div>
</li>
The same example with the solution i found,
<li style="cursor: pointer !important;">
<div>The text of my Link</div>
</li>
This solution only uses css to disable the link.
With the first css rule cursor: pointer !important; i ensure that this link will have the correct (for my case) pointer icon.
With the second rule pointer-events: none; i ensure that this link will not be clickable.
You can find more about this rule following this link.

You can just simply remove href attribute from your <a> tag.
<a href="#"> => <a>