How to change the style of a CSS class with javascript? - javascript

for example, I have some Html code like this
<div class="abc"></div>
with a css stylesheet like this
.abc{display:none}
Now I would like to change the style of css class abc to display:block, how should I do it?

Would you like to change really property and value of the CSS class or just change class applied to your HTML element ?
In this case, with jQuery for example, you just have to do :
$('div').removeClass('abc').addClass('cba');
This will remove the 'abc' class currently attached to your div element and set the 'cba' class for this element.
Your 'cba' class is defined as :
.cba{display: block}

Just use simple action below
$(".abc").show(); // to display block on css
$(".abc").hide(); // to display none on css
Here full code to implement your question
<!--html code-->
<div class="abc">Hello World</div>
<!--stlyling-->
<style>
.abc{display:none}
</style>
<!--script-->
<script src="https://code.jquery.com/jquery-1.9.1.min.js"></script>
<script>
$( document ).ready(function() {
$(".abc").show();
});
</script>
Hope it help

For all the people saying document.getElementsByClassName('abc').style.display = 'block'; works...
How it should be:
let e = document.getElementsByClassName('abc');
for(i = 0; i < e.length; i++){
e[i].style.display = 'block';
}
.abc{display:none;}
<div class="abc">HI!</div>
<div class="abc">You can see me!</div>
document.getElementsByClassName('abc').style.display = 'block'; method:
document.getElementsByClassName('abc').style.display = 'block';
.abc{display: none;}
<div class="abc">HI!</div>
<div class="abc">You can see me!</div>

Find your element in the DOM and use el.classList.remove("abc") to remove the .abc class.
https://developer.mozilla.org/en-US/docs/Web/API/Element/classList
How to find the element?
https://www.w3schools.com/js/js_htmldom_elements.asp

import jquery library using
<script src="https://code.jquery.com/jquery-2.2.4.min.js"></script>
Use simple jquery to hide or show
$(".abc").hide();//for display none
$(".abc").show();//for display block

IF you have one '.abc' class :
document.getElementsByClassName("abc")[0].style.display = "block";
IF you have more of one '.abc' class :
var len = document.getElementsByClassName('abc');
for(i = 0; i < len.length; i++){
len[i].style.display = 'block';
}

Related

Change only the text of an anchor javascript

I'm trying to write a simple script which will change the text of a number of anchors on a page. I'm quite new to Javascript and I'm able to change the anchors but it changes the whole tag including removing the href.
How do I edit just the text only without affecting the href?
<body>
<div class="loop-add-to-cart">
Add to basket
<div class="wpd-buttons-wrap-simple" data-id="11544">
Design from blank
</div>
</div>
<script>
function buybuttons() {
var buybuttons = document.getElementsByClassName('wpd-buttons-wrap-simple');
for(var i = 0; i < buybuttons.length; i++){
buybuttons[i].innerHTML="Test";
};
}
buybuttons();
</script>
</body>
You can use a query selector to get all a tags inside an element with a class of wpd-buttons-wrap-simple:
document.querySelectorAll('.wpd-buttons-wrap-simple a');
You can then set the textContent or innerHTML of the link.
<body>
<div class="loop-add-to-cart">
Add to basket
<div class="wpd-buttons-wrap-simple" data-id="11544">
Design from blank
</div>
</div>
<script>
function buybuttons() {
var buybuttons = document.querySelectorAll('.wpd-buttons-wrap-simple a');
for(var i = 0; i < buybuttons.length; i++){
buybuttons[i].textContent = "Test";
};
}
buybuttons();
</script>
</body>
Using 'querySelectorAll' you can get the element the class and the element inside as below:
document.querySelectorAll('.wpd-buttons-wrap-simple > a')
function buybuttons() {
var buybuttons = document.querySelectorAll('.wpd-buttons-wrap-simple a');
for(var i = 0; i < buybuttons.length; i++){
buybuttons[i].innerHTML="Test";
};
}
buybuttons();
You are currently overwriting the innerHTML of the div element, but you are looking for the anchor element inside of the div.
Use document.querySelectorAll to get all of them, or document.querySelector to only get the first.

How to hide unwanted element on the embed website by using script?

Faced with necessity to hide unwanted element on embed website. There's piece of HTML code:
<section class="class Name" style="display: block;">
Problem: Manipulate with CSS does not work due to 'display: block' written inline in HTML body.
Question: Is there any way how to remove this element OR rewrite 'display: block' TO 'display: none' with Java script OR jQuery?
May be it worth, here's exact piece of code that necessary to rewrite from 'display: block' to 'display: hide':
<section class="promotion-block custom-storey no-margin-bottom multi-lang-default en ru pt es fr" style="display: block;">
The task is to add some script that will force native code to be rewritten from display: block; to display: hide;
Thanks!
Try in java script..
document.getElementById('#ElementId').style.display = 'block';//show
document.getElementById('#ElementId').style.display = 'none';//hide
and with jQuery..
$("#ElementId").hide();
$("#ElementId").show();
Hope this helps...
you are going to need to manipulate the JavaScript style proprieties here did you try this:
element.style.display = 'none'; // Hide
element.style.display = 'block'; // Show
element.style.display = 'inline'; // Show
element.style.display = 'inline-block'; // Show
remember to create an getelementID(div ID around or into section tag)
function hide (elements) {
elements = elements.length ? elements : [elements];
for (var index = 0; index < elements.length; index++) {
elements[index].style.display = 'none';
}
}
in JQuery use this to hidden/show div block:
$(".divIDClass").hide(); // hidden
$(".divIDClass").hide(); // show
There needs to be some user interaction to make to toggle between being visible and hidden, i will be assuming it to be a click event on a button with id button.
<script>
var buttonEL = document.getElementById("button");
buttonEL.addEventListener("click" function(){document.getElementsByClass("className")[0].style.display = "none";});
</script>
or if your set up requires it to be hidden always just have
document.getElementsByClass("className")[0].style.display = "none";
There is 2 way to hide the section
override the style attribute.
Use jQuery hide() and show()
If the section is dynamic loaded then you have to use jquery on function .
code:
$(document).on('load','section[class="class Name"]',function()
{
$(this).css('style','display:none');
});
$(document).on('load','section[class="class Name"]',function()
{
$(this).hide();
});
If not dynamic loaded
code:
$('section[class="class Name"]').css('style','display:none');
$('section[class="class Name"]').hide();

'href' Not Showing Output on Click

Im trying to have a href link expand/display extra text when clicked however when I click it nothing happens.
When I run the html code I can click on the link but it does not show the text for some reason.
Any idea why?
Heres the code:
<html>
click to expand
<div id="divID" style="display: none;">this is expanded</div>
</html>
I'm trying to keep the code as short as possible as the above code will have to be repeated hundreds of times for each link.
Assuming you're using jQuery, you are using the CSS selector incorrectly. Your line should be this:
click to expand
The # in #divID represents any element with an id of divID, whereas just using divID will search for divID tags (something like <divID></divID>)
See here for more documentation on the ID Selector and here's a list of all the CSS selectors you can use, including the Element Selector for you to understand why your previous code didn't work.
You can also combine CSS selectors to narrow your selection in the future, although it's not much necessary with an ID selector:
click to expand
And if you absolutely insist on not using jQuery:
click to expand
or breaking it out into its own function:
<script>
function toggleElementById(id) {
if (document.getElementById(id).style.display == 'none') {
document.getElementById(id).style.display = 'block';
} else {
document.getElementById(id).style.display = 'none';
}
}
</script>
click to expand
Add this to your page:
<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
Then:
$('#divID').toggle();
I see you're using jQuery, right? So I wrote your answer in jQuery..
$('.toggle').click(function () {
var selected = $(this).attr('href');
$('.expandable'+selected).toggle();
});
Check out the jsfiddle
If you're not using jQuery than here is the javascript version (html changed).
var expandable = document.getElementsByClassName("expandable");
for (i = 0; i < expandable.length; ++i) {
expandable[i].setAttribute('style','display: none;');
}
var toggle = document.getElementsByClassName("toggle");
for (i = 0; i < toggle.length; ++i) {
toggle[i].setAttribute('onclick','toggler(this)');
}
function toggler(obj) {
var id = obj.dataset.toggle,
el = document.getElementById(id);
el.style.display = (el.style.display != 'none' ? 'none' : '');
}
Check out the jsfiddle

Best way to show all hidden divs in javascript

I have several hidden divs inside large div, they can be shown one by one or all at once
It looks like this:
<div class="maindiv">
Print "<a href=javascript:show()>Click here to show all</a>
Show/hide div1
<div id="div1" style="display:none;">.....</div>
Show/hide div2
<div id="div2" style="display:none;">.....</div>
....
</div>
showhide() function is ok showing/hiding given div, show() works too but like this:
function show(){
div1.style.display="block";
div2.style.display="block";
...
}
so if I'll have 100 divs I'll have to enter it there 100 times
so my question is, how can I find all hidden divs in div with class maindiv and show em other way than enumerate? Or is the way I do ok?
Try using a generic css class name that is defined similarly:
.hidden{
display:none;
}
Then all you have to do is select the elements that have that class and remove that class. Assuming you are using at least IE9 you can try:
var divs = document.getElementsByClassName("hidden");
for(var i = 0; i < divs.length; i++)
{
divs[i].className = ""; //assuming you only have that class set else you will need to do a search and replace
}
If you have to support earlier versions there are other methods that will work to gather all the divs you need such as document.getElementsByTagName("div")
LIVE DEMO
Try this:
JQuery
$('.maindiv div a').click(function(){
$(this).next().toggle();
});
$('#showAll').click(function(){
$('.maindiv div div').show();
});
HTML
<div class="maindiv">
Click here to show all
<div>
Show/hide div1
<div>.....</div>
Show/hide div2
<div>.....</div>
</div>
</div>
CSS
.maindiv div a{
display:block;
}
.maindiv div div{
display:none;
}
Please try with the below code snippet.
var divs = document.getElementsByTagName("div");
for(var i = 0; i < divs.length; i++){
//You can also write here if condition
divs[i].style.display = "block";
}
I think this can work
http://jsfiddle.net/rtu75/
function show() {
var divs = document.getElementsByClassName("maindiv");
var l = divs.length;
for( var i = 0; i < l; i++) {
divs[i].setAttribute("class", "show");
}
}
In your css
.show div {
display: block !important;
}
Added important since you have inline styles
Using jQuery, try
$("*").show();
or
$(parentElem).find("*").show();
or
$(":not(:visible)").show();
// This selects "*". Not I expected.
See w3 - css selectors, MDN - css pseudo classes, and jQuery $(), $().find(), $().filter() methods.
As I saw your code below, I saw it's almost work. You need to change id='div1' to class='hid' after that read my below step >> Go down
Show/hide div1
<div id="div1" style="display:none;">.....</div>
Here is my step, I am in same problem but now I can solve this because I read https://stackoverflow.com/a/24192071/10618118 then try to solve until done.
Read below,it's my code.It's work as I want.
in My Style for CSS be like this
<style>
.hid {}
</style>
Next is My Button to control it hidden or visible, Simple.
<button id="see" type="button" onclick="clickSee();">Show More ...</button>
Next step, look at my Javascript Code below,
I use JQuery 3.2.1 to change function in onclick of button.
when user want to hide or see more
just click Show More ... or ... Show less,
Actually it's the same button but user don't know.
If you didn't use JQuery yet and decide to use just copy
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
and paste in <head></head>
<script>
function clickSee() {
document.getElementById("see").innerHTML = "... Show Less";
var divs = document.getElementsByClassName("hid");
for (var i = 0; i < divs.length; i++){
divs[i].style.display = "block";
}
//I use JQuery
$("#see").attr("onclick", "clickHide()");
}
function clickHide() {
document.getElementById("see").innerHTML = "Show More ... ";
var divs = document.getElementsByClassName("hid");
for (var i = 0; i < divs.length; i++){
divs[i].style.display = "none";
}
//I use JQuery
$("#see").attr("onclick", "clickSee()");
}
</script>
If you have any issues just comment below, I will try to help because when done.
There are many way to make your idea work. but I see here is my basic way.
Feel free for new recommendation. Thank you.

Hide H1 Element using JavaScript

I want to hide the <h1> element using plain javascript, not jQuery, without adding id="whatever" or class="whatever" to the tag. Is this possible?
Why can't I just add id="whatever" to the tag?
I'm using a UIButton in xCode that when clicked, it injects javascript into a UIWebView. Inside that UIWebView is a H1 element that is on a website that I do not have access to to add <h1 id="whatever">. I hope it makes sense.
document.getElementsByTagName('h1')[0].style.display = 'none';
You can use getElementsByTagName method:
var h = context.getElementsByTagName('h1');
for (var i = h.length; i--; ) {
h[i].style.display = 'none';
}
Where context is document or more specific parent node you want to search your headers within.
However there is better solution. You could add specific class to some parent node and hide child headers with CSS:
.without-headers h1 {display: none;}
Use getElementsByTagName to hide the first h1 on your page:
document.getElementsByTagName("h1")[0].style.display = "none";
// ^ index 0, so that's the first `h` that's found.
Or to hide them all:
var headers = document.getElementsByTagName("h1");
for (var i = 0, l = headers.length; i < l; i++; ) {
headers[i].style.display = "none";
}
Or even better yet, if you can modify the CSS:
h1{
display:none;
}
For the JavaScript solutions, please keep in mind that they will only work when the DOM has been loaded.
Add a domready event listener, like this:
window.addEvent('domready', function() {
// modify your DOM here.
});
you can use getElementsByTagName
document.getElementsByTagName("h1")
But it will access all h1 elements, so to be more specific access it by index like this
document.getElementsByTagName("h1")[0].style.display = "none";
just small change in dfsq's code
var h = document.getElementsByTagName('h1');
for (var i =0; i<h.length; i++) {
document.getElementsByTagName('h1').item(i).style.display = 'none';
}

Categories

Resources