Develop Reference

Replace the main image with thumbnails in Javascript

Here my script :
function changeImage(event){
event = event || window.event;
var targetElement = event.target || event.srcElement;
if (targetElement.tagName == "IMG"){
document.getElementByClass("img-big-wrap").src = targetElement.getAttribute("src");
document.getElementById("mainimageLink").href = 'link'+targetElement.getAttribute("data-link")+'.html';
}
}
Inspired of this Answer : Javascript Gallery - Main Image href change
My HTML :
<div class="gallery-wrap">
<div class="img-big-wrap">
<a id="mainimagelink" href="<?php echo $data[0][gallery][0][photo];?>">
<img class="img-big-wrap" src="<?php echo $data[0][gallery][0][photo];?>" alt="">
</div>
<div class="img-small-wrap" onclick="changeImage(event)">
<div class="item-gallery"> <img src="<?php echo $data[0][gallery][1][thumb];?>" data-link="1"> </div>
<div class="item-gallery"> <img src="<?php echo $data[0][gallery][2][thumb];?>" data-link="2"> </div>
<div class="item-gallery"> <img src="<?php echo $data[0][gallery][3][thumb];?>" data-link="3"> </div>
<div class="item-gallery"> <img src="<?php echo $data[0][gallery][4][thumb];?>" data-link="4"> </div>
</div>
</div>
The code is actualy just open me the link of the main image only
I want to change the main image with the thumbnails when I click On, I dont know if what i'm doing is the good solution

Working Plunk: http://plnkr.co/edit/pjpHBUD4yPihqr7lJKAD?p=preview
<div class="gallery-wrap">
<div>
<a id="mainimagelink" href="https://blog.conservation.org/wp-content/uploads/2014/06/ci_19290600_cropped.jpg">
<img class="img-big-wrap" src="https://blog.conservation.org/wp-content/uploads/2014/06/ci_19290600_cropped.jpg?>" alt="">
</a>
<hr/>
</div>
<div class="img-small-wrap" ">
<div class="item-gallery " onclick="changeImage(event) "> <img src="https://s5.favim.com/610/52/Favim.com-winter-nature-small-canon-eos-7d-474348.jpg " data-link="1 "> </div>
<div class="item-gallery " onclick="changeImage(event) "> <img src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTfAMUZQLGObfUBSLgnPj5b5C7Ww2DNMtKbwkuTbglK-p1La17BnA " data-link="2 "> </div>
</div>
</div>
A couple of things you've missed.
The HTML DOM was not well constructed. The tag with id mainimagelink was left unclosed, leading to opening of the main image everytime you clicked on any image.
Not sure of your use case but I believe you were trying to create a thumbnail gallery with a preview. Added Image URLs and CSS to simulate the API response.
'img-big-wrap' class was used for the image container and the actual Image itself, which would lead to errors when you try to locate your element with js.
document.getElementByClass is not the right name for the method. I believe you were going for 'document.getElementsByClassName' which returns an array as multiple elements can have the same className.
Refer to querySelector (most useful of them all):
https://www.w3schools.com/jsref/met_document_queryselector.asp
All the best!

First of all, you have used the same class more than once and tried to access it img-big-wrap.
There is also no accessor called getElementByClass instead use
getElementsByClassName which is an array since you can have multiple divs with the same class.
Typo here "mainimageLink" which you called your div with id="mainimagelink", case matters.
I have moved onclick into JS using addEventListener which saves me passing parameters from the div.
Add an id into your thumbnail parent div myImgDiv and used it to hook an Event Listener to it.
Here is what the code looks like (Not many changes were made):
let smallImgDiv = document.getElementById('myImgDiv');
smallImgDiv.addEventListener('click', (e) => {
let targetElement = e.target || e.srcElement;
let tagName = targetElement.tagName;
if(tagName === "IMG") {
document.getElementById('bigImage').src = targetElement.getAttribute("src");
document.getElementById("mainimagelink").href = 'link' + targetElement.getAttribute("data-link") + '.html';
}
});
.img-small-wrap img{
width: 150px;
height: 150px;
}
.img-big-wrap {
height: 200px;
}
<div class="gallery-wrap">
<div class="img-big-wrap">
<a id="mainimagelink" href="#">
<img id="bigImage" class="img-big-wrap" src="http://via.placeholder.com/300.png" alt="">
</a>
</div>
<div id="myImgDiv" class="img-small-wrap">
<div class="item-gallery"> <img src="https://getuikit.com/v2/docs/images/placeholder_200x100.svg" data-link="1"> </div>
<div class="item-gallery"> <img src="https://cdn.dribbble.com/users/312581/screenshots/1676038/female-placeholder_1x.png" data-link="2"> </div>
<div class="item-gallery"> <img src="https://d30y9cdsu7xlg0.cloudfront.net/png/1134418-200.png" data-link="3"> </div>
<div class="item-gallery"> <img src="https://source.sierrawireless.com/~/media/developer%20zone/icons/sw_dz_icons_placeholder.ashx?h=240&la=en&w=240" data-link="4"> </div>
</div>

how to get div elements using click function jquery ,php

I don't know why click function not working,
jquery code
$("[id^='msgr_']").click(function(){
var id= $(this).attr('id').split("_")[1];
$("#chatbox-data-"+id ).fadeIn();
});
Html code
<div id="chatbox-data-<?php echo $d['qid'];?>" class="chatbox">
<div style="background-color:#000; color:#fff;padding:10px;">
title:<a><?php echo $d['title'];?></a><br>
qid:<?php echo $d ['qid'];?>
<span class="close">×</span>
</div><br>
link:
<a class="clinks msgr" style="text-decoration: none; font-weight:bold;"
id="msgr_<?php echo $d['qid'];?>"href="javascript:void(0)">message</a>
when i click message link chatbox needs to be open but not working don't
no what is the problem save me

first this is a part of your code:
<div id="chatbox-data-<?php echo $d['qid'];?>" class="chatbox">
<div style="background-color:#000; color:#fff;padding:10px;">
title:<a><?php echo $d['title'];?></a><br>
qid:<?php echo $d ['qid'];?>
<span class="close">×</span>
</div><br>
you open two div and only close one , so replace it to :
<div id="chatbox-data-<?php echo $d['qid'];?>" class="chatbox">
<div style="background-color:#000; color:#fff;padding:10px;">
title:<a><?php echo $d['title'];?></a><br>
qid:<?php echo $d ['qid'];?>
<span class="close">×</span>
</div></div><br>
then at js code :
$("[id^='msgr_']").click(function(){
var id= $(this).attr('id').split("_")[1];
$("#chatbox-data-"+id ).fadeIn();
});
you use fadeIn to element already displayed so,no change will happen.
either to make that element style= "display:none" to accept fadeIn onclick that anchor or to change it to fadeOut to see effect :
$("[id^='msgr_']").click(function(){
var id= $(this).attr('id').split("_")[1];
$("#chatbox-data-"+id ).fadeOut();
});
or
$("[id^='msgr_']").click(function(){
var id= $(this).attr('id').split("_")[1];
$("#chatbox-data-"+id ).fadeOut(1000).fadeIn(1000);
});

How to make an image slider with dynamic content

How can I make a content slider, like the popular product sliders shown on most websites (Flipkart, Amazon), which scroll left and right on button click, similar to this image:
I have only four contents showing, but I want to add some more, and I want it to slide on button click. Sorry, I dont know the exact term for it.
These content values would be dynamic.
<div class="dialog">
<div class="shop_img">
<img src="../image/shops/1.jpg">
</div>
<hr id="hr">
<div class="shop_name">
<?php echo $name;?>
</div>
<a href="detail.php?add=<?php echo $add_id;?>"><div class="address">
<span id="1">ADDRESS</span><span id="2"><i class="fa fa-arrow-right" aria-hidden="true"></i></i></span>
</div></a>
</div>

This is called carousel.
You can use a javascript plugin called owl carousel from here http://www.owlcarousel.owlgraphic.com/ to achieve that effect.
You can use php foreach loop to dynamically generate your carousel items inside carousel container like below:
<?php
foreach ($items as $key => $item) {
ob_start();
?>
<div class="dialog">
<div class="shop_img">
<img src="../image/shops/<?php echo $item->imageName;?>">
</div>
<hr id="hr">
<div class="shop_name">
<?php echo $item->name;?>
</div>
<a href="detail.php?add=<?php echo $item->id;?>"><div class="address">
<span id="1">ADDRESS</span><span id="2"><i class="fa fa-arrow-right" aria-hidden="true"></i></i></span>
</div></a>
</div>
<?php
$itemHtml = ob_get_clean();
print $itemHtml;
}
?>

Making a <div> Clickable in Wordpress

I'm working on modifying an existing wordpress portfolio page. All that is left to do is to make it so when the user clicks anywhere in the article list the link will open. Currently it is just when the title or image is clicked.
I can see that I could make a clickable with the following setup:
<a href="http://example.com">
<div>
anything
</div>
</a>
However Wordpress moves the tags when the page loads like so:
<a href="http://example.com">
</a>
<div>
anything
</div>
So I started to work on using css with the following setup:
HTML
<div class= "box">
</div>
CSS
div.box {
position: relative;
}
div.box:hover {
cursor: hand;
cursor: pointer;
opacity: .9;
}
The hover works, it triggers over all of the content and a cursor does appear.
However thats as much as I can do so far. Any attempt to interact with the .box is shot down. Nothing will trigger with javascript using the following :
$(".box").click(function() {
alert("I am an alert box!");
});
I cannot seem to interact with the div.
The page is as follows:
<div class= "box">
<article id="post-<?php the_ID(); ?>" class="portfolio-article clearfix">
<?php if( get_post_meta($post->ID, "portfolio_image", true) ): ?>
<img src="<?php the_field('portfolio_image'); ?>" class="portfolio-image">
<!--get PDF if not empty-->
<?php else: ?>
<img src="http://domain.com/wp-content/uploads/2014/02/placeholder.png" class="portfolio-image">
<?php endif; ?>
<div class="portfolio-content">
<header>
<?php if( get_post_meta($post->ID, "portfolio_link", true) ): ?>
<h1 class="portfolio-title">
<a target="_blank" href="<?php the_field('portfolio_link'); ?>">
<?php the_field('portfolio_title'); ?> <span class="sosa-icon">p</span>
</a>
</h1>
<!--get PDF if not empty-->
<?php else: ?>
<h1 class="portfolio-title"><?php the_field('portfolio_title'); ?></h1>
<?php endif; ?>
</header>
<p class="portfolio-meta">
<?php the_field('portfolio_publication_and_date'); ?>
<?php if( get_post_meta($post->ID, "portfolio_pdf_upload", true) ): ?>
<span class="sosa-icon">H</span> Open Pdf<!--get PDF if not empty-->
<?php endif; ?>
</p><!-- END ortfolio-meta -->
</div><!--portfolio-content-->
</article>
</div>

NewToJS was in the right area when saying it could be a problem with the access to the jQuery library. In this case I had linked jQuery correctly, it was tested and working.
jQuery in Wordpress needs to be enqueued by adding the following into functions.php
wp_enqueue_script("jquery");
My fault was because I didn't change the '$' to 'jQuery' as this is necessary when working with Wordpress.
Here is the incorrect usage :
$(".box").click(function() {
alert("I am an alert box!");
});
Here is the correct usage :
jQuery(".box").click(function() {
alert("I am an alert box!");
});

Dropdown box close on click

I have a DIV that expands on click, it currently closes when another DIV is clicked but I would also like it to close on click, my code is below:
The Jquery:
$(function(){
$('.opReview').click(function(){
$('.review').addClass('hide');
$(this).children('.review').toggleClass('hide');
});
});
The HTML Markup (Wordpress code can be ignored)
<article class="sixteen columns opReview">
<img class="opLogo" src="<?php bloginfo('stylesheet_directory'); ?>/img/core/operator/90x58_operatorlogo/<?php echo $op_logo?>.png" alt="<?php echo($op_title)?>" >
<div class="list_details">
<div class="reviewTitle"><p>Click To </br> Read a review</p> </div>
</div>
<button class="claimBtn"><i class="fa fa-chevron-circle-right fa-rotate-90"></i></button>
<div class="clear"></div>
<div class="review hide">
<h1><?php echo $op_name; ?></h1>
<p><?php echo $operator_review; ?></p>
</div>
</article>

This code hides all .review elements and then toggles the active one, unhiding it
$('.review').addClass('hide');
$(this).children('.review').toggleClass('hide');
you need to do exclude the current item from the first selector
$(this).siblings('.review').addClass('hide');
$(this).children('.review').toggleClass('hide');