I have this html codes example:
<html>
<body>
<div>
<div id="stophere">
<h4 class="parentclass">
<span class="target">Clicked</span>
</h4>
</div>
</div>
</body>
</html>
From the html codes example above, I want to get all parents' tag name of class target (when receiving click event) down from div with id stophere.
I tried this code:
$(ev.target).parents()
.map(function() {
return this.tagName;
})
.get()
.join( ", " );
But it includes all parents' tag names above stophere. While the result I want is only 1 div and 1 h4.
What is the correct way to get all parents of target down from stophere?
You can use the parentsUntil method for that
$(ev.target).parentsUntil($('#stophere').parent())
Note that it's non-inclusive, so we pass the parent of #stophere to include that element as well
FIDDLE
I don't claim that this is a good solution, but can be used if adeneo's solution is failed in your situation like in my case.
This code is checking whether the traversing limit is containing that limit line itself or not, by using find() method:
jQuery('html').on("click", function (ev) {
var elemparentid = jQuery(ev.target).closest("[id]").attr("id");
var thisparents = jQuery(ev.target).parents()
.map(function () {
// check if traversing limit is a children of current element or not, by using find() method
if (jQuery(this).find("#" + elemparentid).length < 1) {
return this.tagName;
}
}).get()
.join(", ");
alert(thisparents);
});
FIDDLE
Related
I'd like to select an element using javascript/jquery in Tampermonkey.
The class name and the tag of the elements are changing each time the page loads.
So I'd have to use some form of regex, but cant figure out how to do it.
This is how the html looks like:
<ivodo class="ivodo" ... </ivodo>
<ivodo class="ivodo" ... </ivodo>
<ivodo class="ivodo" ... </ivodo>
The tag always is the same as the classname.
It's always a 4/5 letter random "code"
I'm guessing it would be something like this:
$('[/^[a-z]{4,5}/}')
Could anyone please help me to get the right regexp?
You can't use regexp in selectors. You can pick some container and select its all elements and then filter them based on their class names. This probably won't be super fast, though.
I made a demo for you:
https://codepen.io/anon/pen/RZXdrL?editors=1010
html:
<div class="container">
<abc class="abc">abc</abc>
<abdef class="abdef">abdef</abdef>
<hdusf class="hdusf">hdusf</hdusf>
<ueff class="ueff">ueff</ueff>
<asdas class="asdas">asdas</asdas>
<asfg class="asfg">asfg</asfg>
<aasdasdbc class="aasdasdbc">aasdasdbc</aasdasdbc>
</div>
js (with jQuery):
const $elements = $('.container *').filter((index, element) => {
return (element.className.length === 5);
});
$elements.css('color', 'red');
The simplest way to do this would be to select those dynamic elements based on a fixed parent, for example:
$('#parent > *').each(function() {
// your logic here...
})
If the rules by which these tags are constructed are reliably as you state in the question, then you could select all elements then filter out those which are not of interest, for example :
var $elements = $('*').filter(function() {
return this.className.length === 5 && this.className.toUpperCase() === this.tagName.toUpperCase();
});
DEMO
Of course, you may want initially to select only the elements in some container(s). If so then replace '*' with a more specific selector :
var $elements = $('someSelector *').filter(function() {
return this.className.length === 5 && this.className.toUpperCase() === this.tagName.toUpperCase();
});
You can do this in vanilla JS
DEMO
Check the demo dev tools console
<body>
<things class="things">things</things>
<div class="stuff">this is not the DOM element you're looking for</div>
</body>
JS
// Grab the body children
var bodyChildren = document.getElementsByTagName("body")[0].children;
// Convert children to an array and filter out everything but the targets
var targets = [].filter.call(bodyChildren, function(el) {
var tagName = el.tagName.toLowerCase();
var classlistVal = el.classList.value.toLowerCase();
if (tagName === classlistVal) { return el; }
});
targets.forEach(function(el) {
// Do stuff
console.log(el)
})
So I more than one dynamicly generated elements with the same class name that I am trying to check input for in jQuery. Instead of it letting me click on both, it is just letting me click the first element generated.
Ex: I click on item_1 and it returns the item_1 id, but when I click on item_2 it doesn't return anyting.
HTML
<div id="item_1" class="resp"></div>
<div id="item_2" class="resp"></div>
JS - Jquery
$(".resp").on("click",() =>{
var id = $(".resp").attr("id");
console.log('attempting toggle' + id);
});
Firstly, you have to use normal function instead of arrow function (to avoid missing the context). Secondly - use this keyword to refer to the actually clicked element.
$(".resp").on("click", function() {
console.log('attempting toggle ' + this.id);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="item_1" class="resp">A</div>
<div id="item_2" class="resp">B</div>
This is because .attr('id') returns the value of the id attribute of the first matched element in the set.
Instead, use an old school function for the handler so the this value is equal to the clicked div, then get its id:
$(".resp").on("click", function() {
var id = $(this).attr('id');
console.log('attempting toggle ' + id);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="item_1" class="resp">First</div>
<div id="item_2" class="resp">Second</div>
What you're doing here is referencing the classname to obtain the id. This gathers the id of the first classname, which isn't what you desire. What you need to do is use the this keyword to correctly obtain the id.
After removing the arrow function and changing the internal code a bit, it should look like this:
$(".resp").on("click", function() {
var id = this.id;
console.log('attempting toggle: ' + id);
});
Also make sure you've correctly installed JQuery. Pick up your JQuery embed code from here.
Also remember to include your JQuery code before your JavaScript code.
I want to delete element with class "tehnicneinfo" but only if the element I'm checking ( with class "h2size") has no child. I have a bunch of those elements, generated by a plugin and I want to delete only the ones that have the next element without child. I wrote jquery code, but it delets all of my elements, not only the ones that have the next element without child. Here is my jquery code:
$('.news .h2size > div').each(function() {
var ul = $(this).find('ul');
if(!ul.length) $(this).remove();
var h1 = $('.news').find('.tehnicneinfo');
var h2size = $('.news').find('.h2size');
if(h2size.prev().is(':empty'))
{
h1.remove();
}
});
this code is inside $(document).ready(function(). Can you tell me what I'm doing wrong? The code is for something else also, so I'm having truble only from var h1 = $('.news').find('.tehnicneinfo'); this line on. Thanks in advance!
Html:
<div class="news">
<h1 class="tehnicneinfo">xxx</h1>
<div class="h2size">
<div id="xyxyxy">
.......
</div>
</div>
<h1 class="tehnicneinfo">yyy</h1>
<div class="h2size"></div>
....
</div>
That's the html, only that there is like 20 more lines that are the same, but with different values (not yyy and xxx). I would need to delete all 'yyy' (they are not all with same value).
You can use filter to filter the ones you want to remove then remove them
"I want to delete only the ones that have the next element without child"
$('.tehnicneinfo').filter(function(){
return !$(this).next().children().length;
// only ones with next sibling with no children
}).remove();
JSFIDDLE
I have the following code:
.recipe
.ingredients
= f.simple_fields_for :ingredients do |ingredient|
= render 'ingredient_fields', f: ingredient
.row#links
.col-xs-12
= link_to_add_association "", f, :ingredients
%hr
I need to select the ingredients div using jquery in the format of $("#links")["closest"](".recipe > .ingredients") but this doesn't select anything.
It's frustrating though as $("#links")["closest"](".recipe > .row") will return the correct div.
Fiddle of what works and what I want: https://jsfiddle.net/yL6dr4s1/
According to jQuery documentation, closest method tries to find element matching the selector by testing the element itself and
traversing up through DOM.
It does not go through siblings of the element.
Based on your requirements, it seems like you want to traverse the tree for getting match in siblings. jQuery has siblings method to do that. So one solution would be to use siblings method like:
$("#links")["siblings"](".recipe > .ingredients")
Another soultion would be to get closest parent and then use children as answered by #mhodges
As for the query $("#links")["closest"](".recipe > .row"):
It works fine because closest method finds the match in the element itself.
Here is the example to showcase that:
$(document).ready(function() {
// Match found because it is parent
console.log($("#links")["closest"](".wrapper").length);
// No match found because element is sibling
console.log($("#links")["closest"](".row1").length);
// No match found because element is sibling
console.log($("#links")["closest"](".row3").length);
// Match found because it is element itself
console.log($("#links")["closest"](".row2").length);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="wrapper">
<div class="row1">
<span>Content1</span>
</div>
<div class="row2" id="links">
<span>Content2</span>
</div>
<div class="row3">
<span>Content3</span>
</div>
</div>
I am not sure of your requirements on using the exact selector/syntax you provided, but this selector works exactly how you want it to.
$(this).closest(".recipe").children(".ingredients").append('<br/><input type="text" value="Flour">');
Edit
This is the closest I could get:
$(this)["closest"](".recipe").children(".ingredients").append('<br/><input type="text" value="Flour">');
I don't think you can use the selectors in the way you propose.
As far as the DOM is concerned (and jQuery), the element defined by ingredient and the element defined by row are not related. You have to traverse up to the parent element, then back down to get to the child.
Here is a fiddle that hopefully demonstrates the issue.
If you can change it so that ingredient and row are both within the same parent div, you might have more luck with your test selector syntax.
When jQuery gets to buggy, doesn't have a certain option or just becomes to messy to use for a certain operation, it is good we also have access to good old plain javascript.
document.querySelector('#addToIngredients').addEventListener('click' , function(e) {
var recipe = getClosest(e.target,'recipe');
if (recipe) {
var ingred = recipe.querySelector('.ingredients');
ingred.innerHTML += '<br/><input type="text" value="Flour">';
}
});
function getClosest(elem,cls) {
var el = elem.parentNode;
while (el){
if (el.className.indexOf(cls) > -1) {
return el;
}
el = el.parentNode;
}
return false;
}
<div class="recipe">
<div class="ingredients">
<input type="text" value="Eggs"><br/>
<input type="text" value="Flour">
</div>
<div class="row">
<div class="col-xs-12">
Add to .ingredients
</div>
</div>
<hr/>
</div>
Of course they can be combined
$(function() {
$("#addToIngredients").on('click', function(e) {
var recipe = getClosest(e.target,'recipe');
if (recipe) {
var ingred = recipe.querySelector('.ingredients');
ingred.innerHTML += '<br/><input type="text" value="Flour">';
}
});
})
so basically here is my script:
http://jsfiddle.net/JJFap/42/
Code -
jQuery(document).ready(function() {
var rel = new Array();
var count = 0;
jQuery(".setting").each(function() {
rel[count] = [];
if(jQuery("span").attr("rel")) {
rel[count].push(jQuery("span").attr("rel"));
}
console.log(count);
count++;
});
jQuery("body").text(rel);
console.log(rel);
});
and
<div class="setting">
<span rel="Variable">Variable</span>
<span rel="Item">Item</span>
<span rel="Something">Something</span>
</div>
<div>
<span rel="Smth">Smth</span>
<span>Sec</span>
</div>
<div class="setting">
<span>Second</span>
<span rel="first">First</span>
<span rel="Third">Third</span>
</div>
my question, is why does it display Variable, variable?
I would like it to display Variable, First, but I'm not able to do.
Basically what I would like to achieve is create new array, in which insert each div.setting span elements with rel attribute array.
So basically in this example it should output -
Array (
Array[0] => "Variable","Item","Something";
Array[1] => "first","Third";
)
Hope you understood what I meant :)
EDIT:
In my other example I tried to add jQuery("span").each(function() ... inside first each function, but it outputted two full arrays of all span elements with rel. I can't have different classes / ids for each div element, since all will have same class.
jQuery('span') is going to find ALL spans in your page, and then pull out the rel attribute of the first one. Since you don't provide a context for that span search, you'll always get the same #1 span in the document.
You should be using this:
jQuery('span',this).each(function() {
rel[count] = [];
if (jQuery(this).attr("rel")) {
rel[count].push(jQuery(this).attr("rel"));
}
console.log(count);
count++;
})
instead of this:
rel[count] = [];
if(jQuery("span").attr("rel")) {
rel[count].push(jQuery("span").attr("rel"));
}
console.log(count);
count++;
http://jsfiddle.net/mblase75/JJFap/52/
The trick is to use a second .each to loop over all the span tags inside each <div class="setting"> -- your original code was using jQuery("span"), which would just grab the first span tag in the document every time.
In addition to what has been said, you can also get rid of the count and one push() when using jQuery.fn.map() as well as getting rid of the if when adding [rel] to the selector:
jQuery(document).ready(function() {
var rel = [];
jQuery(".setting").each(function() {
rel.push(jQuery(this).find('span[rel]').map(function() {
return this.getAttribute('rel');
}).get());
});
jQuery("body").text(rel);
console.log(rel);
});
Within the .each() method, you have this code a couple times: jQuery("span").attr("rel"). That code simply looks for ALL span tags on the page. When you stick it inside the .push() method, it's just going to push the value for the rel attribute of the first jQuery object in the collection. Instead, you want to do something like $(this).find('span'). This will cause it to look for any span tags that are descendants of the current .setting element that the .each() method is iterating over.