Get data attribute value and output image equal to this value - javascript

I'm very new to this, I'm looking to get the data-rating value of each line of HTML and output the same image a multiple amount of times for each line, dependent on each value, using jQuery/Javascript.
Here's a sample of the HTML:
<div class="review-value" data-rating="5"></div>
<div class="review-value" data-rating="7"></div>
How can I best do this?

One of the way to do it.
Get the attribute for each div.
Run the loop that many times and add an image in each iteration
$('.review-value').each(function() {
for (var i = 0, len = parseInt($(this).attr("data-rating")); i < len; i++) {
$('<img src="#" />').appendTo($(this))
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div class="review-value" data-rating="5"></div>
<div class="review-value" data-rating="7"></div>

You can use this code:
$('.review-value').each(function (index, value) {
alert('div' + index + ':' + $(this).attr("data-rating"));
});

Data is HTML's attribute. you can use that as well with Jquery each loop and store the value in Array
var getRating = [];
$('.review-value').each(function () {
getRating.push($(this).data("rating"));
});
alert(getRating);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
<div class="review-value" data-rating="5"></div>
<div class="review-value" data-rating="7"></div>

JQuery has data() that can help you get the value of any data attributes:
$(document).ready(function() {
$(".review-value").each(function() {
console.log('Rating: ' + $(this).data('rating'));
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="review-value" data-rating="5"></div>
<div class="review-value" data-rating="7"></div>

Related

Jquery find all elements with custom attribute begin with, get rest of it's name and it's value

Let's say we have element with custom attribute
... bind-html="varName" ...
I want to find all elements with attribute beginning with "bind-",
then get second part of it's name, which is unknown, in this case "html".
And at last get it's value "varName".
How do i achieved this with Jquery? I don't want to use second attribute to describe attibute to bind (like .. bind="varName" attr="html" ..)
You can use a loop through each object's attributes this.attributes and use the attribute's name and value properties.
Running example:
$("input").each(function() {
$.each(this.attributes, function() {
if (this.name.indexOf('bind-') == 0) {
console.log(this.name + ' has the value: ' + this.value);
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<input bind-koby='hello'>
<input bind-douek='stack'>
<input will-not-show='yes'>
<input bind-hello='overflow'>
well that what you are looking for like
<div bind-html="varName">hi there i am </div>
well hi thats me
var namer = $(" *[attr*='bind']").text();
console.log(namer);
<div class="bindable" data-bind="html:varName1"></div>
<div class="bindable" data-bind="css:varName2"></div>
<div class="bindable" data-bind="js:varName3"></div>
<div class="bindable" data-bind="whatEver:varName4"></div>
(function(){
let bindables = $('.bindable');
bindables.each(function(){
let bindData = $(this).data('bind');
let bindDataArray = bindData.split(":");
console.log(bindDataArray);
});
}());
now u will get array with data u want
You can get all elements and their attributes which contain bind- by using jquery .properties and .indexOf() like following example.
// $("*") selects all elements in your html
$("*").each(function() {
$.each(this.attributes, function() {
// checks whether element has an attribute starts with "bind-" or not
if(this.specified && this.name.indexOf("bind-") !== -1) {
console.log("Attr Name: "+ this.name + " Attr Value: " + this.value)
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<span bindNot-html="bindNot">element1</span>
<div bind-html="varName1">element2</div>
<a bind-html2="varName2">element3</a>
<div bind-html3="varName3">element4</div>
<span bindNot-html="bindNot">element5</span>

How to know if two divs are present with same id in javascript?

Is there any way to check if two divs are having same ids?
I have created divs dynamically and I am finding it difficult to remove the div having a duplicate id, can anyone help here?
I do not know what you are trying to achieve here , but generally you should not have two elements with the same id . But if you have some reason to do this maybe you are building a validator or someting like this you can do the following to count the number of elements
var count = document.querySelectorAll('#test').length;
console.log(count);
then you can loop through them and remove them using
document.querySelectorAll('#test')[1].remove();
Try it with:
$('[id]').each(function () {
var ids = $('[id=' + this.id + ']');
if (ids.length > 1 && ids[0] == this) {
$(ids[1]).remove();
}
});
You have to loop all the elements as helpers like getElementById() won't work well when their aren't unique.
Example, no need for jQuery. Alerts the duplicate ID.
var idMap = {};
var all = document.getElementsByTagName("*");
for (var i=0; i < all.length; i++) {
// Do something with the element here
var elem = all[i];
if(elem.id != ""){ //skip without id
if(idMap[elem.id]){
alert("'" + elem.id + "' is not unique")
}
idMap[elem.id] = true;
}
}
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title></title>
</head>
<body>
<div id="id1"></div>
<div id="id2"></div>
<div id="id3"></div>
<div id="id4"></div>
<div id="id5"></div>
<div id="id1"></div>
</body>
</html>
var idList = [];
$('*[id]').each(function(){
var id = $(this).attr('id');
if($.inArray(id, idList)){
alert('the id ' + id + ' is already set!');
} else {
idList.push(id);
}
});
$('[id]').each(function(){
var ids = $('[id="'+this.id+'"]');
if (ids.length>1 && ids[0]==this){
$("#"+this.id).remove();
}
});​
above function use jquery to create array of all IDs with in the document and remove duplicated id
Something like this should do what you want
$('[id]').each(function (i) {
$('[id="' + this.id + '"]').slice(1).remove();
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id = "1">
ola
</div>
<div id = "2">
ole
</div>
<div id = "1">
ola
</div>
<div id = "3">
olo
</div>
<div id = "1">
ola
</div>
<div id = "3">
olo
</div>
Example based on the link: jQuery: Finding duplicate ID's and removing all but the first
Can you not just control + F and search for the id's? Also if you are using an editor like atom, you can delete every other duplicate in one go after the search.

Simplify function for removing duplicate array

I want to find div element that contain custom attribute mod than append that div to list item. But first I have to remove divs that contain duplicate mod value. Here's what I have done
<div class="list"></div>
<div class="container">
<div mod="dog"></div>
<div mod="man"></div>
<div mod="woman"></div>
<div mod="dog"></div>
<div mod="bird"></div>
<div mod="insects"></div>
<div mod="dog"></div>
</div>
this is my script
modArr($('.container').find('[mod]'))
function modArr(el){
var filterArray = [] // store mod
, modNames = [] // store mod value
, arrIndex = [] // store non duplicate index
, li = [] // store
modArray = el
// store mod value
for(var i=0; i < modArray.length; i++){
modNames.push($(modArray[i]).attr('mod')) // get mod value from div
}
// search for non duplicate mod value and get the index of none duplicate mod
for(var i=0; i < modArray.length; i++){
if(filterArray.indexOf(modNames[i]) === -1){
filterArray.push(modNames[i])
arrIndex.push(i) // push non duplicate index value
}
}
filterArray = [] // reset filterArray
// push module from modArray to filterArray using index in arrIndex
for(var i=0; i < arrIndex.length; i++){
filterArray.push(modArray[arrIndex[i]])
}
// push to li array
$.each(filterArray,function(i,el){
li[i] = '<li>'+ el.outerHTML +'</li>'
})
$('<ul></ul>')
.append(li.join(''))
.appendTo('.list')
}
What you can see is that I've used to many loops, is there any simple way to do this. Thanks!
We can use an object as a map for checking duplicates, see comments (I've added text to the mod divs so we can see them):
modArr($('.container').find('[mod]'));
function modArr(elements) {
// A place to remember the mods we've seen
var knownMods = Object.create(null);
// Create the list
var ul = $("<ul></ul>");
// Loop the divs
elements.each(function() {
// Get this mod value
var mod = this.getAttribute("mod");
// Already have one?
if (!knownMods[mod]) {
// No, add it
knownMods[mod] = true;
ul.append($("<li></li>").append(this.cloneNode(true)));
}
});
// Put the list in the .list element
ul.appendTo(".list");
}
<div class="list"></div>
<div class="container">
<div mod="dog">dog</div>
<div mod="man">man</div>
<div mod="woman">woman</div>
<div mod="dog">dog</div>
<div mod="bird">bird</div>
<div mod="insects">insects</div>
<div mod="dog">dog</div>
</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
We can also just use the DOM to check for duplicates, but it's a bit slower (not that it matters for the number of elements here):
modArr($('.container').find('[mod]'));
function modArr(elements) {
// Create the list
var ul = $("<ul></ul>");
// Loop the divs
elements.each(function() {
// Get this mod value
var mod = this.getAttribute("mod");
// Already have one?
if (ul.find('div[mod="' + mod + '"]').length == 0) {
// No, add it
ul.append($("<li></li>").append(this.cloneNode(true)));
}
});
// Put the list in the .list element
ul.appendTo(".list");
}
<div class="list"></div>
<div class="container">
<div mod="dog">dog</div>
<div mod="man">man</div>
<div mod="woman">woman</div>
<div mod="dog">dog</div>
<div mod="bird">bird</div>
<div mod="insects">insects</div>
<div mod="dog">dog</div>
</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
Note: I used this.cloneNode(true) rather than outerHTML because there's no need to take a roundtrip through markup. If you want more jQuery there, it's $(this).clone(); ;-) Similarly, if you don't like this.getAttribute("mod"), there's $(this).attr("mod").
I'd be remiss if I didn't point out that mod is an invalid attribute name for div elements. You can use any name you want starting with data-, though, so perhaps use <div data-mod="dog"> instead.
Try this, only adds if an element with mod is not already in list:
$('.list').append('<ul>');
$('.container [mod]').each(function(index, el) {
if($('.list [mod=' + $(el).attr('mod') + ']').length === 0) {
$('.list ul').append($('<li>' + el.outerHTML + '</li>'));
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<div class="list"></div>
<div class="container">
<div mod="dog">Dog1</div>
<div mod="man">Man1</div>
<div mod="woman">Woman1</div>
<div mod="dog">Dog2</div>
<div mod="bird">Bird1</div>
<div mod="insects">Insect1</div>
<div mod="dog">Dog3</div>
</div>

How to find the deepest child of a div with jquery

I'm trying to find the deepest element in the specified divwith jquery. But the code which used is producing the error TypeError: parent.children is not a function.
I found this code from this link
the code is :
function findDeepestChild(parent) {
var result = {depth: 0, element: parent};
parent.children().each( //Here I getting the error TypeError: parent.children is not a function
function(idx) {
var child = $(this);
var childResult = findDeepestChild(child);
if (childResult.depth + 1 > result.depth) {
result = {
depth: 1 + childResult.depth,
element: childResult.element};
}
}
);
return result;
}
---------------------------------------------------------------------------------------
$(document).on('keypress','#sendComment', function(e) {
if(e.keyCode==13){
var itemId=$('#findbefore').prev('.snew').attr('id');//
var item=findDeepestChild(itemId);
alert(item);
}
});
And my divs are :
<div id="S04" class="snew" style="display: block;">
<div class="author-image"></div>
<span>xyz shared the image xyz</span>
<div class="s-content">
<div class="s-message"></div>
<div class="shpicture">
<img class="SharedImage" width="100%" height="100%" data-shareid="1" data-alid="1" data-id="1" alt="xyz" src="data:image/jpeg;base64,">
</div>
</div>
</div>
<div class="SPcommentbox">
<div class="comment">
<div class="commenter-image"></div>
<div class="addcomment">
<input class="commentbox" type="text" placeholder="Write a comment...">
</div>
</div>
</div>
I need to find the img from these.
please anyone help me .... Thanks ...
To get the deepest nested elements, use
$("#" + parent).find("*").last().siblings().addBack()
http://jsfiddle.net/6ymUY/1/
you can then get the id data attribute with
item.data("id")
http://jsfiddle.net/6ymUY/2/
full code:
function findDeepestChild(parent) {
return $("#" + parent).find("*").last().siblings().addBack();
}
var item=findDeepestChild("S04");
console.log(item)
console.log(item.data("id"));
You're calling it with a string, but it's expecting a jQuery instance.
Instead of
var itemId=$('#findbefore').prev('.snew').attr('id');//
var item=findDeepestChild(itemId);
you probably want
var item=findDeepestChild($('#findbefore').prev('.snew'));
You are passing in itemId, which is the ID attribute of a given element. I think what you meant to pass was the element itself. Just remove the attr call, leaving this:
var item = findDeepestChild($("#findbefore").prev(".snew"));

Need help on constructing this jQuery

I am having a bunch of div tags in my html page. Now I need to write a jQuery to calculate the grid's value. In the below example I will be using grid0 as the base id and I want the count in that series which is 1 here.
<div id="grid00">0</div>
<div id="grid01">0</div>
<div id="grid02">0</div>
<div id="grid03">1</div>
<div id="grid04">0</div>
<div id="grid05">0</div>
In another example given below I will be using id's starting with grid1 and the total value is 6. Please guide me!
<div id="grid10">5</div>
<div id="grid11">0</div>
<div id="grid12">0</div>
<div id="grid13">1</div>
<div id="grid14">0</div>
<div id="grid15">0</div>
I tried this jQuery("div[id^='grid0']"). But this is giving me all the elements. But I need the count using the value inside them.
Thanks!
Start by selecting the divs with the starts-with selector and loop through the results and tally up the text values casted to integers.
function GetSum(prefix) {
var sum = 0;
$("div[id^='" + prefix + "']").each(function(){
sum += parseInt($(this).text());
});
return sum;
}
var grid0Total = GetSum("grid0");
var grid1Total = GetSum("grid1");
Or if you wanted to take it a step further with a jQuery function:
jQuery.extend({
gridSum: function(prefix) {
var sum = 0;
if(!!prefix) {
$("div[id^='" + prefix + "']").each(function(){
sum += parseInt($(this).text());
});
}
return sum;
}
});
then you could write:
var grid0Total = jQuery.gridSum("grid0");
var grid1Total = jQuery.gridSum("grid1");
You could also use the map() function like so:
var sum = 0;
$("div[id^='" + prefix + "']").map(function(){
return sum += parseInt($(this).text());
});
return sum;
See them all in action here: http://jsfiddle.net/FpmFW/1/
Try:
function total(idPrefix) {
var total = 0;
$('div[id^="' + idPrefix + '"]').each(function() {
total += parseInt($(this).text());
});
return total;
}
var grid0total = total('grid0'),
grid1total = total('grid1');
See: http://jsfiddle.net/Au8Fr/
I'd give all grid divs one commmon class. Something like this:
<div class="grid" id="myGrids">
<div class="grid" id="grid10">5</div>
<div class="grid" id="grid11">0</div>
<div class="grid" id="grid12">0</div>
<div class="grid" id="grid13">1</div>
<div class="grid" id="grid14">0</div>
<div class="grid" id="grid15">0</div>
</div>
Now you can easily count their values:
var count=0;
$(".grid").each(function(){
count+=parseInt($(this).text())
})
You can loop through all of your grid0X divs like this:
var countOnes = 0;
$('div[id^=grid0]').each(function() {
if ($(this).text() === "1") {
++countOnes;
}
});
That finds all div elements whose ID starts with grid0 (so, grid00, grid01, etc.). The loop counts how many of them contain just the text "1", which is what I think you were after in your question; if not, the loop logic is easily manipulated.
Similarly, for grid1X, just change the selector to use 1 instead of 0.
Alternately, though, if these divs are in some kind of container, you could use a selector to find the container and then loop through its children, e.g.:
HTML:
<div id="grid0">
<div>0</div>
<div>0</div>
<div>0</div>
<div>1</div>
<div>0</div>
<div>0</div>
</div>
JavaScript:
$("#grid0 > div").each(...);
...and avoid having all those IDs.

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