<body>
<div class = "order-1-a">
<div class = "order 2-a">
<div class = "order 3-a"></div>
</div>
<div class = "order 2-b"></div>
<div class = "order 2-c"></div>
<div class = "order 2-d"></div>
</div>
<div class = "order-1-b"></div>
</body>
If I want a div to wrap only class "order-2-a" + being the first child of "class-1-a", how should I script the div with JavaScript?
Probably your best bet is to:
Create a new Element with .createElement().
Append 2-a to the new Element with .appendChild().
Insert the new element before 2b with .insertBefore().
var one_a = document.getElementsByClassName("order-1-a")[0];
var two_a = document.getElementsByClassName("order-2-a")[0];
var two_b = document.getElementsByClassName("order-2-b")[0];
var new_node = document.createElement("div");
new_node.appendChild(two_a);
one_a.insertBefore(new_node, two_b);
console.log(one_a.innerHTML);
<body>
<div class="order-1-a">
<div class="order-2-a">
<div class="order-3-a"></div>
</div>
<div class="order-2-b"></div>
<div class="order-2-c"></div>
<div class="order-2-d"></div>
</div>
<div class="order-1-b"></div>
</body>
This provides the structure you're looking for (albeit not displayed well with console.log()).
Also, please be aware that class names cannot start with numbers, and may yield unexpected results. I've updated most of your classes to start with order in my example, as is with your order-1-a class.
Hope this helps!
You can create a general wrapping function based on a selector. It should get the subject node, then its parent and either it's next sibling or null if there isn't one.
Then create an element of the required type, append the subject node and insert it before the next sibling or as the last node if there wasn't one.
PS.
I've modified the class names to be valid, they can't start with a digit.
// Wrap element with selector in element with tagName
function wrapEl(selector, tagName) {
var node = document.querySelector(selector);
// If there is no subject node, return
if (!node) return;
// Get parent and sibling (or null if there isn't one)
var parent = node.parentNode;
var sibling = node.nextSibling;
// Append stuff
var wrapper = document.createElement('tagName');
wrapper.textContent = 'inserted wrapper'; // Just to show it's there
wrapper.appendChild(node);
parent.insertBefore(wrapper, sibling);
}
window.onload = function() {
wrapEl('.order-2-a', 'div');
}
<body>
<div class = "order-1-a">
<div class = "order-2-a">
<div class = "order-3-a"></div>
</div>
<div class = "order-2-b"></div>
<div class = "order 2-c"></div>
<div class = "order 2-d"></div>
</div>
<div class = "order-1-b"></div>
</body>
Related
lets say i have a parent-div. And in this div-container, i want to display 5 elements which have all the same structure. For example:
<div class="element">
<p class="name">
</p>
<div class="logo">
</div>
</div>
Is there a way to make an object or prototype out of it, so i dont have to generate every single HTML Element with their classes and src values with the appendChild-function and Dot-Notations in a for-loop?
Im thinking of something like:
for(let i = 0; i<=5;i++){
var element = new element(class,src1,src2 ...);
}
And the "element" is defined in a external class file or something familiar.
Im a beginner, so please show mercy :)
You'll need to clone the node from the template's content. For example:
const templateElement = document.querySelector("#someTemplate")
.content
.querySelector(".element");
// create an Array of nodes (so in memory)
const fiveNodes = [];
for (let i = 0; i < 5; i += 1) {
const nwNode = templateElement.cloneNode(true);
// ^ clone the whole tree
nwNode.querySelector("p.name").textContent += ` #${i + 1}`;
fiveNodes.push(nwNode);
}
// append the nodes to document.body
// this is faster than appending every element in the loop
fiveNodes.forEach(el => document.body.append(el));
<template id="someTemplate">
<div class="element">
<p class="name">I am node</p>
<div class="logo"></div>
</div>
</template>
I want to change the HTML-value of the highlighted span below (class=percent-value):
<div id="verfuegbarstd" class="et_pb_number_counter_4" data-number-value="0" data-number-separator="">
<div class="percent">
<p>**<span class="percent-value">0</span>**<span class="percent-sign"></span></p>
</div>
<h3 class="title">Verfügbare Stunden</h3>
<canvas height="0" width="0"></canvas>
</div>
I tried the following:
var verfuegbareStd = document.getElementsByClassName('et_pb_number_counter_4').getElementsByClassName('percent').getElementsByClassName('percent-value');
var budget = document.getElementsByClassName('et_pb_number_counter_2').getElementsByClassName('percent').getElementsByClassName('percent-value');
var lohnProStd = document.getElementsByClassName('et_pb_number_counter_3').getElementsByClassName('percent').getElementsByClassName('percent-value');
var gebrauchteStd = document.getElementsByClassName('et_pb_number_counter_5').getElementsByClassName('percent').getElementsByClassName('percent-value');
function calcVerfuegbareStd() {
var calc = budget.innerHTML / lohnProStd.innerHTML;
verfuegbareStd.innerHTML = calc;
}
calcVerfuegbareStd();
Does that make any sense?
document.getElementsByClassName returns a collection of all elements in the document with the specified class name, as a NodeList object. So thats why i check the length.
You can use also document.querySelector which gets the first element in the document with the class "xxxx" is returned.
I put both!
You can do it with jquery also but i thought you want pure js.
var elements = document.getElementsByClassName('percent-value'); // List of elements
var spanQuery = document.querySelector('.percent-value'); // The first element in the document with the class "myclass" is returned:
spanQuery.innerHTML = 'Hello!!!';
if (elements.length > 0) {
var span = elements[0];
span.innerHTML = 'Hello!!!';
}
<div id="verfuegbarstd" class="et_pb_number_counter_4" data-number-value="0" data-number-separator="">
<div class="percent">
<p>**<span class="percent-value">0</span>**<span class="percent-sign"></span></p>
</div>
<h3 class="title">Verfügbare Stunden</h3>
<canvas height="0" width="0"></canvas></div>
Try this?:
document.getElementsByClassName("percent-value").innerHTML = "the content you want";
It is simpler to use querySelector(). This will return the first element.
var verfuegbareStd = document.querySelector('.et_pb_number_counter_4 .percent .percent-value');
console.log(verfuegbareStd.innerHTML)
<div id="verfuegbarstd" class="et_pb_number_counter_4" data-number-value="0" data-number-separator="">
<div class="percent">
<p>**<span class="percent-value">0</span>**<span class="percent-sign"></span></p>
</div>
<h3 class="title">Verfügbare Stunden</h3>
<canvas height="0" width="0"></canvas>
</div>
I have a function which accepts two parameters, each of type HTML element. It is supposed to return which element appears first in the document order. Is there any simple way to determine this?
Template -
<body>
<div id="div1">
<div id="div2">
</div>
</div>
<div id="div3">
<div id="div4">
</div>
</div>
</body>
JS -
const elem1 = document.getElementById('div2');
const elem2 = document.getElementById('div4');
const firstAppearingElement = checkOrder(elem1, elem2); // it should return elem1
function checkOrder(element1, element2) {
// check which one appears first in dom tree
}
You can try with Node.compareDocumentPosition()
The Node.compareDocumentPosition() method compares the position of the
given node against another node in any document.
The syntax is object.compareDocumentPosition (nodeToCompare);
let first = document.getElementById('a');
let second=document.getElementById('b');
// Because the result returned by compareDocumentPosition() is a bitmask, the bitwise AND operator has to be used for meaningful results.See link above for more
if (first.compareDocumentPosition(second) & Node.DOCUMENT_POSITION_FOLLOWING) {
console.log('element with id a is before element with id b'); //
} else {
console.log('element with id a is after element with id b');
}
<div id="a"></div>
<div id="b"></div>
Responses to this:
How to remove elements except any specific id
are close to what I want but not quite.
In my case I am asking how I can remove all elements under parent id except id_n and its children: test1 and test2. The elements need to be removed, not just hidden.
<div id = "parent_id">
<div id = "id_1">
<div id = "id_11"> test</div>
<div id = "id_12">test </div>
</div>
<div id = "id_2"> test</div>
<div id = "id_n">id_n<br>
<div id='test1'>test1<br><div>
<div id='test2'>test2<br><div>
</div>
</div>
The result should be:
<div id = "parent_id">
<div id = "id_n">id_n<br>
<div id='test1'>test1<br><div>
<div id='test2'>test2<br><div>
</div>
</div>
Thanks for looking at this. Your suggestions are appreciated.
Using jQuery's siblings you remove all of it's children:
$('#id_n').siblings().remove();
Okay after thinking about this, there is another approach using Array manipulation:
var parentElement = document.getElementById('#parent_id');
parentElement.innerHtml = [].splice.call(parentElement.children).filter(item, function() {
return item.id === childId;
}).reduce((collatedHtml, item, function() {
return collatedHtml + item.innerHtml;
});
This grabs all the direct children of the parentElement and returns a new array (using Array.filter) before using Array.Reduce to collate the innerHtml of all the children.
Note: the reason i'm not using the ... prefix to convert to an Array is because it is not supported in IE 11 and below
Hey I need to count the nested divs with a given class name. For example:
<div id = "divA">
<div class = "anotherName"></div>
<div class = "toBeCounted"></div>
<div class = "someName"></div>
<div class = "toBeCounted"></div>
<div class = "toBeCounted"></div>
<div class = ""></div>
</div>
<div id = "divB">
<div class = ""></div>
<div class = "toBeCounted"></div>
<div class = ""></div>
<div class = "toBeCounted"></div>
</div>
So if I want to count "toBeCounted" I would get 3 for divA and 2 for divB.
You can use .querySelectorAll() and check the length of the result:
var divAcount = document.querySelectorAll("#divA > .toBeCounted").length;
The > relation insists that the .toBeCounted elements are immediate children of divA. If that's not what you want, and any toBeCounted div within divA should count, you'd just leave out the >.
try this pure javascript code
var countinDivA = document.getElementById("divA").getElementsByClassName("toBeCounted").length;
var countinDivB = document.getElementById("divB").getElementsByClassName("toBeCounted").length;
With Jquery this can be easily achieved by using
var countA = $("#divA .toBeCounted").length;
var countB = $("#divB .toBeCounted").length;
If you don't know the id's of the parents ahead of time, this may prove useful:
var parents = [],
counted = document.getElementsByClassName("toBeCounted");
for (var i=0; i < counted.length; i++ ) {
var id = counted[i].parentNode.id;
if ( !parents[id] ) parents[id] = 1
else parents[id]++;
}
[ divA: 3, divB: 2 ]