How to get value of particular selector with same id?
function rev() {
var username = document.getElementById(value).value; /// or textContent;
return alert (username);
}
<button id="but" onclick="rev()">hey</button>
<button id="but" onclick="rev()">hey233</button>
But the reult always HEY
Any ideas?
You cannot have duplicate elements with the same ids. Its just not possible.
The id attribute for the elements must be unique. From the MDN :
The id global attribute defines a unique identifier (ID) which must be
unique in the whole document. Its purpose is to identify the element
when linking (using a fragment identifier), scripting, or styling
(with CSS).
Work Around:
You can use class or custom data-* attributes to get along with your logic. Read more about data-* attributes here
Hi you need seperate these, with the buttons having different ids
function rev1() {
var username = document.getElementById("but1").value; /// or textContent;
return alert (username);
}
function rev2() {
var username = document.getElementById("but2").value; /// or textContent;
return alert (username);
}
<button id="but1" onclick="rev1()">hey</button>
<button id="but2" onclick="rev2()">hey233</button>
As mentioned, Element id must be unique. But for what you are doing you do not need an id to get the text content of the button upon 'click', as the handler event knows the target element that was clicked.
function handler(event) {
alert(event.target.textContent);
}
var forEach = Function.call.bind(Array.prototype.forEach);
var buttons = document.querySelectorAll('button');
forEach(buttons, function(button) {
button.addEventListener('click', handler);
});
<button>hey</button>
<button>hey233</button>
Related
How can I trigger an action when an element that has a html data attribute is clicked? I have this element on different places in the same document.
Html element
Sign In
<button href="#" data-trigger="modal" data-target="signUpModal">Sign Up</button>
Javascript
<script>
Let x = getElementByData('data-trigger')
</script>
When the any of the html element is clicked, it will return the object of that element that will include data-target
You can use document.querySelector("[data-attribute]") to get the first element with data-attribute or document.querySelectorAll("[data-attribute]") to get all elements that have data-attribute.
// Get all element that have data-field
const allFields = document.querySelectorAll("[data-field]");
console.log(Array.from(allFields));
// Get just the first element that has data-field=name
const elemName = document.querySelector("[data-field=name]");
console.log(elemName);
<div data-field="name"></div>
<div data-field="company"></div>
UPDATE
Now that you have supplied some code it is easier to understand what you where asking for.
function clickHandle(event) {
event.preventDefault(); // Stop the default action (will stop <a> to go to the link, so that you can open your own dialogue or do whatever you want.
const elem = event.target;
// your code here. You can access the data attributes via the dataset property:
console.log(elem.dataset.target);
}
// Get all elements that have data-trigger=modal, and add the clickHandle to them:
document.querySelectorAll("[data-trigger=modal]").forEach(
(elem) => elem.addEventListener("click", clickHandle)
);
Sign In
<button href="#" data-trigger="modal" data-target="signUpModal">Sign Up</button>
I have the following html (it's a card) where a class is added to change the look of it:
<div class="card-small-half" id="card-1">
<a href="components/">
<div class="action-bar">
<p>Add Page</p>
<i class="material-icons">add</i>
</div>
</a>
</div>
and a switch made with a label that checks and unchecks an input type checkbox:
<div class="switch-wrapper" id="switch-wrapper-1">
<input type="checkbox" id="input-1" class="display-none">
<label class="switch" for="input-1"></label>
<p id="switch-caption-1">Visible</p>
</div>
With the following Javascript I add a class called "card-disabled" to the card:
window.onload = function () {
function check() {
if (document.getElementById("input-1").checked) {
document.getElementById("switch-caption-1").textContent = "Disabled";
$('#card-1').addClass('card-disabled');
} else {
document.getElementById("switch-caption-1").textContent = "Visible";
$('#card-1').removeClass('card-disabled');
}
}
document.getElementById('input-1').onchange = check;
check();
}
I know in css you can call id's or classes like so:
#switch-wrapper-1 input { /* styles */ }
or
#switch-wrapper-1 p { /* styles */ }
How can I do this with javascript, so I don't have to use an id for every element and instead use a global id for every wrapper.
EDIT:
The wrapper and input id's are unique! I want to call the paragraph inside the unique wrapper element something like this:
document.getElementById("switch-wrapper-1 p").textContent = "Disabled";
The 'p' here means paragraph
Is this possible and if so: how?
Query Selector is your friend here. You can use CSS selectors to retrieve DOM elements. In your case this call would return the first paragraph child in the #switch-wrapper-1 element.
var node = document.querySelector('#switch-wrapper-1 p');
If you also use jQuery, then as suggested in comments, you can simply use the $ function.
var $node = $('#switch-wrapper-1 p');
To select an individual element inside of an element with a specific ID using Javascript you can do:
document.getElementById('hello').getElementsByTagName('input')[0];
So in your example it would be:
document.getElementById('switch-wrapper-1').getElementsByTagName('input')[0].onchange = check;
The [0] is used because getElementsByTagName returns an array of all the child elements inside the parent element with the specified tag. Note that you will have to keep the unique ID on the input field if you want the for attribute on the label to function correctly.
I have two IDs in same name ! if any one clicked among them , i need to change the class name of the both IDs. i know we should use ID for single use. Because of my situation(I have two classes for button ) so i have moved to ID.
Her is my code if i click one id that name only changes another one is remains same
<button class="success" id="1" onClick="reply(this.id)"> Added </button>
<button class="success" id="1" onClick="reply(this.id)"> Added </button>
js function
function reply(clicked_id)
{
document.getElementById(clicked_id).setAttribute('class', 'failed');
var el = document.getElementById(clicked_id);
if (el.firstChild.data == "Added")
{
el.firstChild.data = "Add";
}
}
if i use instead of 'class' to id while renaming class which one will be renamed success class or 'class name 1' ?
You can't. Getelementbyid will only return one element. Probably the first one.
Pure JS Is Second Example
My JS Fiddle Example: http://jsfiddle.net/eunzs7rz/
This example will use the class attribute only to perform the switching that you need, its a extremely basic example as do not want to go beyond what is needed... Also i forgot to remove the id's in the JS Fiddle Example.. so just ignore them
THE CSS:
.success {
background-color:#00f;
}
.failed {
background-color:#f00;
}
THE HTML:
<button class="success"> Added </button>
<button class="success"> Added </button>
THE JAVSCRIPT:
$(function() {
$(".success").click(function(){
Reply(this);
});
});
function Reply(oElm) {
$(oElm).attr('class', 'failed');
}
EDIT - PURE JAVASCRIPT VERSION
Sorry, did not think to check the post tags if this was pure JS. But here you go anyway ;)
<style>
.success {
background-color:#00f;
}
.failed {
background-color:#f00;
}
</style>
<button class="success" onclick="Reply(this)"> Added </button>
<button class="success" onclick="Reply(this)"> Added </button>
<script>
function Reply(oElm) {
oElm.className = 'failed';
}
</script>
THE MAIN THING HERE
Once you have the element either by using 'this' or by using 'getElementBy', you can then simply use ".className" to adjust the class attribute of the selected element.
As already explained by others, id is for single use and is quicker than using class or type. So even if you have a group, if only one is ever used.. use an id.
Then you use the object/reference of 'this' from an event on an element, in this case the onclick... that will send that variable to the function / code called.
So using 'this' is a preferred option as it will always reference the element that it is used/called from.
pass elemenet, not it's Id
<button class="success" id="1" onClick="reply(this)"> Added </button>
<button class="success" id="1" onClick="reply(this)"> Added </button>
function reply(elem)
{
$(elem).setAttribute('class', 'failed');
if (elem.firstChild.data == "Added")
{
elem.firstChild.data = "Add";
}
}
the ID attribute must be unique or else it will get the last defined element with that ID.
See this for reference.
Use a class instead of an id. ids are supposed to be unique in a dom tree.
html:
<button class="success" onClick="reply()"> Added </button>
<button class="success" onClick="reply()"> Added </button>
js:
var ary_success = document.querySelectorAll(".success"); // once and forever. If the set of elements changes, move into function `reply`
function reply () {
var elem;
var s_myclasses;
for (var i=0; i < ary_success.length; i++) {
elem = ary_success[i];
s_myclasses = elem.getAttribute('class');
s_myclasses = s_myclasses.replace ( /(success|failed)/g, '' );
s_myclasses = s_myclasses + ' failed';
elem.setAttribute('class', s_myclasses );
if ( elem.firstChild.data.indexOf("Added") !== -1) {
elem.firstChild.data = "Add";
}
}
}
Live Demo here.
Notes
Make sure that you set ary_successin the onload handler or in an appropriately placed script section - at the timeof execution the buttons must be present in the dom ! If in doubt, move it to the start of reply' body.
If you employ jquery, the code simplifies (well...) to:
$(document).ready( function () {
$(".success").on ( 'click', function ( eve ) {
$(".success").removeClass("success").addClass("failed");
$(".success *:first-child:contains('Added')").text(" Add ");
});
});
Updates
Notes, Live Demo
Iterator method changed, every not supported on test platform
I have this bit of HTML :
<li eventId="123">
<img src="image.jpeg"/>
<h3 id="eventName">Event Name</h3>
<p id="eventDescription"></p>
</li>
I want to be able to pull out the <h3> and <p> via jQuery so that I can update their values.
I have a delegate bound to the list items, and on click I'm trying to grab hold of <h3> and <p> using :
function eventIdClicked()
{
// This gets hold of "123" OK
theEvent.id = $(this).get(0).getAttribute('eventId');
// How to get the other 2 inner html?
var existingEventName = $(this).get(1).getAttribute('eventName');
var existingEventDesc = $(this).get(2).getAttribute('eventDescription');
$.mobile.changePage("home.html");
}
Am I able to do this?
Maybe something like $(this).find("h3").text() and $(this).find("p").text()?
Very simple jquery.
Also, while it isn't affecting the code in this case, ID's must be unique.
If the ID's aren't unique the elements might as well not have id's.
First off, in your case you should use classes instead of Id's if there are going to be multiple eventnames and eventdescriptions. As for the event handling try passing the event object into the function like so:
function eventIdClicked(evt){
// Now you get get the event target.
// In your case this is the li element.
var target = $(evt.target);
// Now you can pull out the children that you want.
var eventName = target.children(".eventName").text();
var eventDescription = target.children(".eventDescription").text();
// Do more stuff...
}
First, I take for granted that there are several of these <li> so you shouldn't use the id attribute as id have to be unique. I replaced these with a class name.
<li eventId="123">
<img src="image.jpeg"/>
<h3 class="name">Event Name</h3>
<p class="description"></p>
</li>
I cleaned up your syntax using cleaner jQuery methods. I also add the values to the object your are already referencing.
function eventIdClicked()
{
theEvent.id = $(this).attr('eventId');
theEvent.name = $('.name', this).text();
theEvent.description= $('.description', this).text();
$.mobile.changePage("home.html");
}
If you are using HTML5 this would be cleaner:
Replace <li eventId="123">
with <li data-event="{'id':123,'name':Event Name','description':'Event Description'}">
Replace
theEvent.id = $(this).attr('eventId');
theEvent.name = $('.name', this).text();
theEvent.description= $('.description', this).text();
with theEvent = $(this).data('event');
function eventIdClicked()
{
// This gets hold of "123" OK
theEvent.id = $(this).get(0).getAttribute('eventId');
// since you used an id for both tags, you could even ommit the context
var existingEventName = $("#eventName", this);
var existingEventDesc = $("#eventDescription", this);
existingEventName.text("a new event name");
existingEventDesc.text("a new description");
$.mobile.changePage("home.html");
}
Use children function:
var existingEventName = $(this).children('h3')
var existingEventDesc = $(this).children('p');
Now you can use text to grab or modify values. On the other hand those elements also have ids so you can access them using id selector.
If you want to change the innerHTML of the <h3> and <p>, you could use
$('#eventName').html(/*NEW HTML HERE*/);
$('#eventDescription').html(/*NEW HTML HERE*/);
This is assuming the ids are unique in your document
I found a response in a jquery forum and they made a function to do this but the result is not the same.
Here is an example that I created for an image button:
var buttonField = $('<input type="image" />');
buttonField.attr('id', 'butonFshi' + lastsel);
buttonField.val('Fshi');
buttonField.attr('src', 'images/square-icon.png');
if (disabled)
buttonField.attr("disabled", "disabled");
buttonField.val('Fshi');
if (onblur !== undefined)
buttonField.focusout(function () { onblur(); });
buttonField.mouseover(function () { ndryshoImazhin(1, lastsel.toString()); });
buttonField.mouseout(function () { ndryshoImazhin(0, lastsel.toString()); });
buttonField.click(function () { fshiClicked(lastsel.toString()); });
And I have this situation:
buttonField[0].outerHTML = `<INPUT id=butonFshi1 value=Fshi src="images/square-icon.png" type=image jQuery15205073038169030395="44">`
instead the outer function I found gives buttonField.outer() = <INPUT id=butonFshi1 value=Fshi src="images/square-icon.png" type=image>
The function is:
$.fn.outer = function(val){
if(val){
$(val).insertBefore(this);
$(this).remove();
}
else{ return $("<div>").append($(this).clone()).html(); }
}
so like this I loose the handlers that I inserted.
Is there anyway to get the outerHTML with jquery in order to have it cross-browser without loosing the handlers ?!
You don't need convert it to text first (which is what disconnects it from the handlers, only DOM nodes and other specific JavaScript objects can have events). Just insert the newly created/modified node directly, e.g.
$('#old-button').after(buttonField).remove();`
after returns the previous jQuery collection so the remove gets rid of the existing element, not the new one.
Try this one:
var html_text = `<INPUT id=butonFshi1 value=Fshi src="images/square-icon.png" type=image jQuery15205073038169030395="44">`
buttonField[0].html(html_text);
:)
Check out the jQuery plugin from https://github.com/darlesson/jquery-outerhtml. With this jQuery plugin you can get the outerHTML from the first matched element, replace a set of elements and manipulate the result in a callback function.
Consider the following HTML:
<span>My example</span>
Consider the following call:
var span = $("span").outerHTML();
The variable span is equal <span>My example</span>.
In the link above you can find more example in how to use .outerHTML() plug-in.
This should work fine:
var outer = buttonField.parent().html();