I have 4 boxes labeled a1, a2, a3, a4 as an example. And when someone clicks on 2 boxes, I want the label (a1, a2 as an example) to print on html output. I just spent over an hour and the best I can come up was printing undefined and null.
Sorry, here is my code
HTML
<div class="container">
<div class="row">
<div class="col-md-3" label="a1">
<a class="btn btn-primary" href="#" role="button">Button 01</a>
<div class="output"></div>
</div>
<div class="col-md-3" label="a2">
<a class="btn btn-primary" href="#" role="button">Button 02</a>
<div class="output"></div>
</div>
<div class="col-md-3" label="a3">
<a class="btn btn-primary" href="#" role="button">Button 03</a>
<div class="output"></div>
</div>
<div class="col-md-3" label="a4">
<a class="btn btn-primary" href="#" role="button">Button 04</a>
<div class="output"></div>
</div>
</div>
</div>
const button = document.querySelector('.btn');
button.addEventListener('click', printLabel);
function printLabel(){
const name = document.querySelector('label');
const print = document.querySelector('.output');
print.innerText = name;
}
label isn't really a standard attribute of the <div> tag. You could try id if you're just looking for a quick solution. Also, you're accessing everything in a pretty strange way.
You should change label to id. The id attribute is pretty much universal to all HTML elements (that I know of) and will allow you to uniquely identify that element.
<div class="container">
<div class="row">
<div class="col-md-3" id="a1">
<a class="btn btn-primary" href="#" role="button">Button 01</a>
<div class="output"></div>
</div>
<div class="col-md-3" id="a2">
<a class="btn btn-primary" href="#" role="button">Button 02</a>
<div class="output"></div>
</div>
<div class="col-md-3" id="a3">
<a class="btn btn-primary" href="#" role="button">Button 03</a>
<div class="output"></div>
</div>
<div class="col-md-3" id="a4">
<a class="btn btn-primary" href="#" role="button">Button 04</a>
<div class="output"></div>
</div>
</div>
</div>
Add a unique id to all of the div elements that are meant to be your "output". This will allow your code to direct the "output" to the right element.
<div class="container">
<div class="row">
<div class="col-md-3" id="a1">
<a class="btn btn-primary" href="#" role="button">Button 01</a>
<div class="output" id="a1-output"></div>
</div>
<div class="col-md-3" id="a2">
<a class="btn btn-primary" href="#" role="button">Button 02</a>
<div class="output" id="a2-output"></div>
</div>
<div class="col-md-3" id="a3">
<a class="btn btn-primary" href="#" role="button">Button 03</a>
<div class="output" id="a3-output"></div>
</div>
<div class="col-md-3" id="a4">
<a class="btn btn-primary" href="#" role="button">Button 04</a>
<div class="output" id="a4-output"></div>
</div>
</div>
</div>
Finally, a couple of changes to your JavaScript. The first change you'll see is that I changed document.querySelector('.btn') to document.querySelectorAll('.btn'). The difference between these methods is that the first one selects ONLY the first element it finds that matches the selector, but the second one selects all elements that match the selector and creates an array.
Next, we loop through that array to add an event listener for each element.
After that, we add a parameter e (for event) to the printLabel() function because addEventListener() passes an event object in the callback function (printLabel). This object gives information about the target element related to the event.
Next, we get the target element of the event and that's your button. Then we get the parentElement of your button because your id or "label" is on the parent element. Then, you can get the name from the id of the parent element.
As a note, remember that id attributes CANNOT have spaces or . or # or really most special characters besides _.
Finally, we need to select your "output" element, and we'll use the id to do that.
document.querySelector('#' + name + '-output'); will get the element that has an id with the given name + -output. For example, if you click button a1 this will get the element with the id of a1-output. The # signifies that you're searching for an id.
Now that we stored this element in a variable print, we can place the text in it using the innerHTML property.
const button = document.querySelectorAll('.btn');
for(var i=0; i < button.length; i++) {
button[i].addEventListener('click', printLabel);
}
function printLabel(e) {
var target = e.target;
var parent = target.parentElement;
const name = parent.id;
const print = document.querySelector('#' + name + '-output');
print.innerHTML = name;
}
I created a JSFiddle to help you.
If you have any questions, please let me know.
<script>
function printDiv(divName){
var printContents = document.getElementById(divName).innerHTML;
var originalContents = document.body.innerHTML;
document.body.innerHTML = printContents;
window.print();
document.body.innerHTML = originalContents;
}
</script>
<h1> do not print this </h1>
<div id='printMe'>
Print this only
</div>
<button onclick="printDiv('printMe')">Print only the above div</button>
We can use event bubbling and data attributes to our advantage here. Replace your label attribute which is non-standard with a data attribute. Also, don't use a if it is not a navigation element, use button instead.
//Get the divs
let divs = document.querySelectorAll("[data-label]")
for(var i = 0; i < divs.length; i++){
//Add the event listener to the DIVs, yes the divs
divs[i].addEventListener("click", function(event){
//Did a button fire the event?
if(event.target.tagName === "BUTTON"){
//update the output div in the clicked div
this.querySelector(".output").innerText = this.dataset.label;
}
});
}
<div class="container">
<div class="row">
<div class="col-md-3" data-label="a1">
<button class="btn btn-primary" role="button">Button 01</button>
<div class="output"></div>
</div>
<div class="col-md-3" data-label="a2">
<button class="btn btn-primary"role="button">Button 02</button>
<div class="output"></div>
</div>
<div class="col-md-3" data-label="a3">
<button class="btn btn-primary" role="button">Button 03</button>
<div class="output"></div>
</div>
<div class="col-md-3" data-label="a4">
<button class="btn btn-primary" role="button">Button 04</button>
<div class="output"></div>
</div>
</div>
</div>
just change your script part to the following to make it work without changing HTML
<script>
//getting all buttons
var buttons = document.getElementsByClassName("btn");
//adding event listner to all buttons
for (var i = 0; i < buttons.length; i++) {
buttons[i].addEventListener("click", printLabel, false);
}
function printLabel() {
const outputDiv = this.parentElement.querySelector(".output"); // this will select only closet div with given class
outputDiv.innerText = this.parentElement.getAttribute("label");
}
</script>
Related
I'm trying to get a modal to open using insertAdjacentHTML so the issue Is insertAdjacentHTML modal isn't opening when inserted onto the DOM. I can only assume I'm missing a simple concept. please help :)
// ----------------Models Materialize Framework----------------
document.addEventListener('DOMContentLoaded', function() {
let elems = document.querySelectorAll('.modal');
let instances = M.Modal.init(elems);
});
// Add Extra Colums
const addMoreBtn = document.getElementById("addmorebtn");
const addColums = document.getElementById("addcolumns");
addMoreBtn.addEventListener('click', (e) => {
e.preventDefault();
const first =
`
<div id="addcolumns">
<!-- Button / Modal / Form Inputs -->
<!-- Button -->
<div class="row">
<div class="col s12 center">
<a href="#exercise1" class="disabled-exersice-btn btn-floating btn-small darken-4 z-depth-2 black center modal-trigger">
<i class="material-icons white-text">add </i>
</a>
</div>
<!-- Modal -->
<div class="modal modal-position" id="exercise1">
<div class="valign-wrapper center-align">
<div class="row">
<form class="exercises-form col s12 valign-wrapper center-align" autocomplete="off">
<div class="input-field">
<input type="text" placeholder="Exercise:" id="autocomplete-input" class="autocomplete center">
<label for="autocomplete-input"></label>
<div class="removebtn-padding">
<input class="modal-close btn black" type="submit" value="Submit">
</div>
</div>
</form>
</div>
</div>
</div>
</div>
`
const position = "afterend";
addColums.insertAdjacentHTML(position, first);
});
You'll need to initialise any new modals that get added to to DOM after they are added.
var elems = document.querySelectorAll('.modal');
var instances = M.Modal.init(elems);
<div id="mainDiv">
<div class="col-md-3">
<div style="padding-top: 25px">
<button class="btn btn-default" onclick="removeFunction()" >Delete</button>
</div>
</div>
</div>
function removeFunction(){
var parent_id = $(this).parent().parent().parent().attr('id');
console.log(parent_id);
alert(parent_id);
$('#'+parent_id).remove();
}
by the upper code i want to get id of div in which button is present and delete it but in console log and in debugger the value i get is 'undefined'
You need to pass this (it was missing in your code) and you need to use that in your removeFunction function instead of this:
function removeFunction(elem) {
var parent_id = $(elem).parent().parent().parent().attr('id');
console.log(parent_id);
alert(parent_id);
$('#' + parent_id).remove();
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="mainDiv">
<div class="col-md-3">
<div style="padding-top: 25px">
<button class="btn btn-default" onclick="removeFunction(this)">Delete</button>
</div>
</div>
</div>
Let's say we have this HTML. The task is to make a function that should remove all previous content from the DOM element with id="removeAbove"
<nav class="navbar>
<div class="container">
<div class="navbar-header">
<button type="button">
<span class="sr-only">Toggle navigation</span>
</button>
<a class="navbar-brand" href="#">Project name</a>
</div>
<div id="navbar" class="navbar-collapse">
<form class="navbar-form">
<div class="form-group">
<input type="text">
</div>
<div class="form-group">
<input type="password">
</div>
<button type="submit" class="btn">Sign in</button>
</form>
</div>
</div>
</nav>
<div class="jumbotron">
<div class="container">
<h1>Hello, world!</h1>
<p>This is a template</p>
<p id="removeAbove"><a class="btn" href="#">Learn more</a></p>
</div>
</div>
Tried el.previousElementSibling.innerHTML = "" but didn't solve the problem. Also tried using the parents. I am thinking about traversing the DOM tree and when the function finds the element with this ID, the previous items start deleting. But...no idea how this could be achieved with pure JS.
If you want to remove everything in the body except the element with the id="removeAbove" please try this:
var el = document.getElementById("removeAbove");
(function removeAllChilds(el, protected) {
//Make the protected elemnt the last in the list !
el.appendChild(protected);
//Remove all child but the protected
while (el.firstChild && el.firstChild !== protected) el.removeChild(el.firstChild);
//If we reachthe body we stop
if (el.tagName.toLowerCase() === 'body') return;
//Call the function with the parent element
removeAllChilds(el.parentElement, el);
})(el.parentElement, el);
Demo:
var el = document.getElementById("removeAbove");
(function removeAllChilds(el, protected) {
//Make the protected elemnt the last in the list !
el.appendChild(protected);
//Remove all child but the protected
while (el.firstChild && el.firstChild !== protected) el.removeChild(el.firstChild);
//If we reachthe body we stop
if (el.tagName.toLowerCase() === 'body') return;
//Call the function with the parent element
removeAllChilds(el.parentElement, el);
})(el.parentElement, el);
<div class="wrapper">
<div>Some div</div>
<nav class="navbar">
<div class="container">
<div class="navbar-header">
<button type="button">
<span class="sr-only">Toggle navigation</span>
</button>
<a class="navbar-brand" href="#">Project name</a>
</div>
<div id="navbar" class="navbar-collapse">
<form class="navbar-form">
<div class="form-group">
<input type="text">
</div>
<div class="form-group">
<input type="password">
</div>
<button type="submit" class="btn">Sign in</button>
</form>
</div>
</div>
</nav>
<div class="jumbotron">
<div class="container">
<h1>Hello, world!</h1>
<p>This is a template</p>
<p id="removeAbove"><a class="btn" href="#">Learn more</a></p>
</div>
</div>
</div>
If you want to remove all the elements before removeAbove, you'll need a loop:
removeAllBefore(document.getElementById('removeAbove'));
function removeAllBefore(el)
{
var prevEl;
while (prevEl = el.previousElementSibling)
prevEl.parentNode.removeChild(prevEl);
if (el.parentNode.tagName.toUpperCase() != 'BODY')
removeAllBefore(el.parentNode);
}
This solution removes everything before the element, recursively, and stops at the body element.
See it in action at plnkr
I have the following HTML/JSP structure:
<div class="col-md-12 task task-box">
<c:if test="${not empty task.titulo}">
<div class="row">
<div class="col-md-12">
<h3 class="task-title">${task.titulo}</h3></div>
</div>
</c:if>
<div class="row">
<div class="col-md-12">
<pre class="task-descricao"><c:out value="${task.descricao}"/></pre>
</div>
</div>
<div class="row">
<div class="col-md-3">
<small class="task-data-criacao">
<i class="fa fa-calendar-o"></i> ${task.dataCriacao}</small>
</div>
<c:if test="${not empty task.dataExecucao}">
<div class="col-md-3">
<small class="task-execucao"><i
class="fa fa-calendar"></i> ${task.dataExecucao}</small>
</div>
</c:if>
<c:if test="${not empty task.arquivo}">
<div class="col-md-3">
<a href="${task.arquivo}" class="btn btn-link btn-sm">
<i class="fa fa-download"></i>
</a>
</div>
</c:if>
<div class="col-md-3"><i class="fa fa-dropbox"></i></div>
<div class="row">
<div class="container">
<div class="col-md-12">
<small class="task-tag"><i class="fa fa-tags"></i> ${task.tags}</small>
</div>
</div>
</div>
</div>
</div>
I will have multiple structures like this one since I'm using <c:forEach>. The wrapper class task.
How can I get the information such as, h3.task-title, pre.task-descricao and others when I click on a div.task with JQuery/JavaScript?
PS: I'm using <c:forEach> to multiply this structure with different inner values.
You can use the this keyword inside your event handler to access the element which triggered the event. Once you have this element, you can use the find function to find the relevant elements inside the target element.
$('div.task').click(function () {
var $title = $(this).find('h3.task-title');
var $descricao = $(this).find('pre.task-descricao');
//...
alert($title.text() + '\n' + $descricao.text());
});
Here is a live example.
using JQuery:
$( "#taskdiv" ).click(function() {
var title = $(".task-title").html();
var descricao = $(".task-descricao").html();
});
Info about jquery click:
http://api.jquery.com/click/
Infor about jquery selectors:
http://www.w3schools.com/Jquery/jquery_ref_selectors.asp
I am trying to target all buttons, that are children of a div with the class 'actions'.
I want my function to take the values from onclick, filter out letters and special chars, and add the numbers to an array.
The function works, when i try to target the buttons OUTSIDE the div, but not when i try to target .actions button.
Anyone have any ideas?
Fiddle: http://jsfiddle.net/Teilmann/wN79n/5/
html:
<div class="actions">
<button onclick="addToCart(1337, 'something');" />
</div>
<div class="actions">
<button onclick="addToCart(1338, 'something');" />
</div>
<div class="actions">
<button onclick="addToCart(1339, 'something');" />
</div>
js:
var products = new Array();
jQuery('.actions button').each(function(){
var id = jQuery(this).getAttribute('onclick');
products.push(id.replace(/[^0-9]/g, ''));
});
alert(products);
Your html is incorrect <button/> it needs to be <button></button> and getAttribute has to be .attr()
HTML
<button onclick="str1" ></button> <!--changed html here from <button/>-->
<button onclick="2" ></button> <!--changed html here from <button/>-->
<button onclick="addToCart(1234, 'something');" ></button> <!--changed html here from <button/>-->
<div class="actions">
<button onclick="addToCart(1337, 'something');" />
</div>
<div class="actions">
<button onclick="addToCart(1338, 'something');" />
</div>
<div class="actions">
<button onclick="addToCart(1339, 'something');" />
</div>
jQuery
var products = new Array();
jQuery('.actions button').each(function(){
var id = jQuery(this).attr('onclick');
products.push(id.replace(/[^0-9]/g, ''));
});
alert(products);
DEMO
If you don't close the button with </button> the html will automatically generate this markup
<button onclick="str1"></button>
<button onclick="2"></button>
<button onclick="addToCart(1234, 'something');">
<div class="actions"></div>
</button>
<button onclick="addToCart(1337, 'something');">
<div class="actions"></div>
</button>
<button onclick="addToCart(1338, 'something');">
<div class="actions"></div>
</button>
<button onclick="addToCart(1339, 'something');"></button>