Jquery: parse div blocks and add id(1,2,3,4,5) - javascript

I'm trying to make jquery parse list of div blocks and add id to each div one by one with numbers like 1,2,3,4,5 and so.
For example, here is the list of div blocks:
<div class="my-blocks">
<div class="start"></div>
<div class="start"></div>
<div class="start"></div>
<div class="start"></div>
</div>
There can be any amount of div blocks with class "start". Final result must be like this:
<div class="my-blocks">
<div id="1" class="start"></div>
<div id="2" class="start"></div>
<div id="3" class="start"></div>
<div id="4" class="start"></div>
</div>
How can I do that? I just don't really understand where I can start to reach this functionality.

You can use .each() to iterate over child divs and then use index+1 to set it as id value.try this:
$('.my-blocks div').each(function(){
$(this).attr('id',$(this).index()+1);
});
Working Demo

You can do:
$('.my-blocks .start').each(function(i) {
$(this).attr('id', i+1);
});
Also note that number is not valid id, you can use div-1, div-2... instead.
Fiddle Demo

You need to add an alphabetical prefix for the ids, Since setting an id as a numeric value is not acceptable in standards below html5. so that your code would achieve backward compatibility.
Try to use the receiver function of .attr(),
$('.my-blocks .start').attr('id', function(i,_) {
return 'id-' + (i+1);
});
DEMO

You must take care that id starting with number is not allowed until html 4. So if you not working on html5 then you should add some prefix to id.
try each():
$('div.start').each(function(index, element){
$(this).attr('id',index+1);
});
Here is working demo.

Using jQuery 'id' property, loop through each block:
$(function(){
$.each($('.start'), function(i,e){
e.id = i+1;
});
});
JSFiddle here http://jsfiddle.net/PU2T4/

And one more (DEMO):
$('.start').attr('id', function() { return $(this).index()+1; });

Related

Downshift remaining IDs after function remove()

I'm using Javascript and I'm having problems trying to remove several elements.
Each div has a specific ID, like this:
<div id='1'></div>
<div id='2'></div>
<div id='3'></div>
<div id='4'></div>
Each div has a button that fires the remove() function
document.getElementById(count).remove()
Count is a variable that is increased whenever I create a new div
The remove() function works, but it creates a gap. IF i remove the div with id=2, then:
<div id='1'></div>
<div id='3'></div>
<div id='4'></div>
But I would like that the remaining IDs could downshift like this:
<div id='1'></div>
<div id='2'></div>
<div id='3'></div>
I guess I need a for loop but I can't understand how to make it
Use a class on each element, like this:
<div class="a" id='1'></div>
<div class="a" id='2'></div>
<div class="a" id='3'></div>
<div class="a" id='4'></div>
And call the following function after each removal:
function resetId(){
const list = document.getElementsByClassName("a")
for(let i = 0; i < list.length; i++){
list[i].id = i + 1
}
}
However, it might be better to just not use IDs in this case. By applying the same class to all your elements, there's no need to readjust the numbering, and you can select (or remove) the nth element using:
document.getElementsByClassName("a")[n]
This would probably be best achieved using jquery.
Here is the working code below:
$("div").each(function(i) {
$(this).attr('id', ++i);
});
$("#remove").click(function() {
$("#2").remove();
$("div").each(function(i) {
$(this).attr('id', ++i);
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id=""><span>0</span></div>
<div id=""><span>0</span></div>
<div id=""><span>0</span></div>
<div id=""><span>0</span></div>
<div id=""><span>0</span></div>
remove
How it works
First $(this).attr('id', ++i); this line here is used to add a number to div id. Ive repeated it in the remove function [("#remove").click(function()] This is because once a div has been removed the will be a number change.
This in affect is a loop. Without all the lines of code. Which is why i like jquery :)
The div id name is found here after they have been written $("#2").remove(); #2 refers to the <div id="2"> As you would in css.
If you notice, with an inspection the numbers down shift as 1 is removes as per your request.
In order to use jquery you have to link the library. <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
A Pure Javascript Version
function resetId(){
var div=document.getElementsByClassName("div")
for(i in div){
div[i].id=i++
}
}
function clicked() {
var elem = document.getElementById("1");
elem.parentNode.removeChild(elem);
resetId();
}
<div class="div" id="0">div</div>
<div class="div" id="1">div</div>
<div class="div" id="2">div</div>
<div class="div" id="3">div</div>
Remove
How it Works
This section here is your loop:
for(i in div){
div[i].id=i++
}
This section quite simply rewrites the numbers 0 - 4 after one has been removed.
The reason it starts from 0, is because in programming we start counting from 0. Hay 0 is a number too guys :).
The i++ Is a basically a mini int [ish] that is increased as the loop counts through how many divs there are.
This var elem = document.getElementById("1"); & this elem.parentNode.removeChild(elem); Is why I find jquery more acceptable in this situation. Its a bit less faf.
Finally resetId(); We have to call the function otherwise it doesn't that anything has changed, because computers are silly and need to be told.
Furter Reading
https://api.jquery.com/
http://www.lucemorker.com/blog/javascript-vs-jquery-quick-overview-and-comparison
Sounds like you should be using classes and referencing elements by index instead. IDs should remain persistent for clarity.
document.getElementsByClassName('my-class')[2].remove();
<div class="my-class" id="thing1">One</div>
<div class="my-class" id="thing2">Two</div>
<div class="my-class" id="thing3">Three</div>
<div class="my-class" id="thing4">Four</div>

Javascript remove specific css value

I am trying to remove the word "Quantity" from below and I think I am close but obviously something is off since it's not working.
<div class="DetailRow" style="display: ;">
<div class="Label">
<label>Quantity</label>
With:
<script type="text/javascript">
$(document).ready(function(){
$('#text_qty_').parent().parent().remove();
$('#qty_').parent().parent().remove();
$('.QuantityInput').remove();
$('label[for="Quantity"]').css('display', 'none').remove();
});
</script>
Try doing it with pure js after adding an id.
<div class="DetailRow" style="display: ;">
<div class="Label">
<label id ="text">Quantity</label>
<script type="text/javascript">
$(document).ready(function(){
document.getElementById("text").innerHTML = "";
});
</script>
Your label needs an id. In this example, I'll use "quantity" as the id.
$('label[id="quantity"]').hide();
This will work but this will apply the style to all labels.
$('label')
Using Pure JavaScript is best though.
Try this $('label').html('');.
$('label[for="Quantity"]') will not retrieve <label>Quantity</label> since it doesn't have the attribute for. Just use $('label') or $('.Label label') and it will work.
Try this if you want to remove the label element itself:
var labels = $('label');
if( labels.text() == 'Quantity' ){
labels.remove();
}
To just remove the word Quantity without removing the label element:
labels.text('');
If you want to remove its parent:
labels.parent().remove();
Also to remove the parent's parent, the <div class="DetailRow"> use this:
labels.parent().parent().remove();
JSFiddle
You can use plain javascript and existing markup with querySelector:
var el = document.querySelector('.DetailRow .Label label');
if (el) {
// do stuff
}
If you want to remove the content, then:
el.textContent = '';
If you want to remove the element, then:
el.parentNode.removeChild(el);
and so on…
I think you can check the label value, and remove the label if the value equals to "Quantity"
Try this:
<div class="DetailRow">
<div class="Label">
<label>Quantity</label>
</div>
</div>
And the script:
$(document).ready(function(){
$(".DetailRow label:contains('Quantity')").hide();
});
http://codepen.io/Himechi90/pen/rOJYjX
Thank you Griffith! This worked perfectly. Full code for anyone trying to remove the quantity and quantity box from only some of your products on bigcommerce. Note that you need to create a separate product template and add this below %%Panel.Header%%
<script type="text/javascript">
$(document).ready(function(){
$('#text_qty_').parent().parent().remove();
$('#qty_').parent().parent().remove();
$('.QuantityInput').remove();
$('label').filter(function() { return $(this).text() === "Quantity"; }).remove();
});
</script>
Note also that your values for #text_qty_ etc may change depending on your template.
Thank you all for taking the time to help me!

Why does jQuery return null for element height?

I faced the same problem as that is mentioned by Matt but it is little different. I am trying to get height of a div but every time I get null.
HTML:
<div id="main" class="box-main " style="display:block">
<div class="box_content" style="position:absolute;top:0px;bottom:0px;height:453px;width:100%;padding-left:5px;padding-bottom:2px;">
<div style="min-width:200px;min-height:41px;padding-top:8px" id="ass-1415241823647 item-97"><div class="box">
<div class="new-try item_message" title="ram"><div class="pp"><img src="images/try.jpg" class="avatar " width="40" height="40"></div>aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
</div>
</div>
</div>
</div>
JavaScript:
$(document).ready(function(){
alert($("#ass-1415241823647 .item_message").height());
});
I tried this too but it didn't work.
$(document).ready(function(){
alert($("#main .box_content #ass-1415241823647 .box .item_message").height());
});
ass-1415241823647 item-97 you can't have two id's remove one or try using class if u really want to
You don't seem to have any elements in your markup matching the selector #ass-1415241823647 .item_message" so it's unable to locate it.
Isn't the result of $("#ass-1415241823647 .item_message") empty jQueryObject? length 0?
.. id="ass-1415241823647 item-97">..
value of id attributes was wrong.
Try this using jquery:
$(document).ready(function(){
alert($(".item_message").css("height"));
});
Hope this helps.

Add class with a particular div

I have this div
<div class="newDiv">
It is generating in loop, something like
<div class="newDiv">
<div class = "innerDiv">
SomeCode
</div>
</div>
<div class="newDiv">
<div class = "innerDiv">
SomeCode
</div>
</div>
<div class="newDiv">
<div class = "innerDiv">
SomeCode
</div>
</div>
Now I want to add another class "BrightDiv" with the div that generated at odd places like
with first and third div.
what should I do to add Class "BrightDiv" along with "newDiv" with every div at odd place?
Try this : You can use :odd or :even to select odd / even elements, but it is depend on the index position and not natural number count. So In your case, you want first and third position div i.e. with index= 0 and 2 which is even by index position and hence use :even.
$('div.newDiv:even').addClass('BrightDiv');
DEMO
You can use filter to select only the odd indexed divs
$(".newDiv").filter(function() {
return $(this).index() % 2 == 1;
}).addClass("BrightDiv");
this will give you a solution $("div:even").addClass("BrightDiv");
Ways to achieve this:
CSS:
.newDiv:nth-child(odd) { /*CSS*/ }
or
.newDiv:nth-child(2n-1) { /*CSS*/ }
jQuery:
$('.newDiv:odd').addClass('BrightDiv');

How to "relate" elements

I was wondering how you could "relate" two HTML elements.
For example, let's say a user clicks on a selection item and I want the element "related" to that element disappear.
<div id="game1Selection">I pick team1</div>
<div id="game2Selection">I pick team2</div>
<div id="game1">This is game 1</div>
<div id="game2">This is game 2</div>
What I would want to happen is that when a user selects "game1Selection" that the div "game1" will disappear and the same thing for game2, game3, etc. I know how to do this the long way:
$('#game1Selection').click( function() {
$('#game1').toggleClass('selected');
}); //selected has the attribute display:none
How could I make two of them related so I don't have to write it the long way and just use this
jsBin demo
$('div[id$=Selection]').click(function(){
var myID = this.id.split('Selection')[0];
$('#'+myID).toggleClass('selected');
});
use the ends with selector $ and retrieve the first part of the ID name by splitting the original ID and getting the first ([0]) part of the name (gameN)
a better idea demo
But a far better example would be using this HTML:
<div>
<div class="selection">I pick team1</div>
<div class="selection">I pick team2</div>
</div>
<div class="game">This is game 1</div>
<div class="game">This is game 2</div>
and retrieve the clicked element index() and find the matching element using .eq() :
$('.selection').click(function(){
var i = $(this).index();
$('.game').removeClass('selected').eq(i).addClass('selected');
});
This will allow you to remove the already selected classes and assign it to the index-matching element.
Use classes for like behavior, and grab the number from the id.
<div id="game1Selection" class="selection">I pick team1</div>
<div id="game2Selection" class="selection">I pick team2</div>
<div id="game1" class="game">This is game 1</div>
<div id="game2" class="game">This is game 2</div>
$('.selection').click( function() {
$("#" + this.id.replace("Selection", "")).toggleClass('selected');
$('.game').not(this).removeClass('selected');
});
I prefer to use HTML5's data-* properties to make the association more explicit:
<div class="selector" data-fadetarget="game1">I pick team1</div>
<div class="selector" data-fadetarget="game2">I pick team2</div>
<div id="game1">This is game 1</div>
<div id="game2">This is game 2</div>
JavaScript:
$('.selector').click( function() {
var target = '#' + $(this).data('fadetarget');
$(target).toggleClass('selected');
});
Using this method, the associations are explicit in the markup and won't fail if things are rearranged.

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