I am trying to implement accessibility option on my page that would change CSS to different file when accessibility button would be clicked.
For now, all my templates extends base_generic.html, where style.css is loaded. When accessibility button would be clicked, I wish for it to change to use style_access.css for that user. How can I accomplish that?
I think a way could be, to refer in the HTML template to both CSS files, and use an onclick function with javascript, and jquery to change the id or class of the specific elements of the template.
So for example,
let's say I wanted onclick to change the CSS of an element, I could make a counter and toggle between two ids that I will have referenced in my CSS file or files.
<body>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js">
</script>
<button>This is a div</button>
<h1 class="potatoe" id="hello">HELLO THIS IS TEXT</h1>
<style>
#hello { color: red; }
#bye { color: blue; }
</style>
<script>
var clickCount = 0;
$("button").on("click", function() {
clickCount++;
$(".potatoe").attr("id", clickCount % 2 === 0 ? "bye" : "hello");
});
</script>
</body>
As you'll see everytime you click the button the CSS of the element will change
This is not exactly changing between CSS files but it ultimately changes the CSS of the elements you want to select.
You can implement by using JavaScript more easily:
const toggleButton = document.getElementById('button');
const workContainer = document.getElementById('work');
toggleButton.addEventListener('click', () => {
document.body.classList.toggle('blue');
toggleButton.classList.toggle('active');
workContainer.classList.toggle('blue');
if(document.body.classList.contains('blue')){
localStorage.setItem('blue', 'enabled');
}else{
localStorage.setItem('blue', 'disabled');
}
});
if(localStorage.getItem('blue') == 'enabled'){
document.body.classList.toggle('blue');
toggleButton.classList.toggle('active');
workContainer.classList.toggle('blue');
}
Related
I want to take a tag and replace with a #Html.textarea() razor html helper but it doesn't look as if JQuery can replace DOM elements with html helpers. How do I go about this?
using(#Html.BeginForm())
{
<a id="clickme">Edit</a>
<div>#Model.username</div>
}
How can I replace this div with #Html.Textarea ? JQuery could do it with div and input tags.
jQuery cannot replace a tag with #Html.TextArea() !
The TextArea helper method is a C# method, which gets executed when razor tries to render the view. This happens in your web server. jQuery is a client side library and anything you do with jQuery happens at client side, in your browser.
But all these helper methods ultimately generate some HTML for DOM elements. That means, you can use jQuery to manipulate visibility of that.
If you are trying to do something like an inline edit, you can use a script like this , to start with
First, render the text area along with your label div, but have it hidden initially. Also wrap the label,edit link and the hidden input inside a container div which we can use later to help with our jQuery selectors.
#using (#Html.BeginForm())
{
<div class="edit-item">
Edit
<div class="edit-label">#Model.FirstName</div>
#Html.TextAreaFor(a => a.FirstName,
new { style = "display:none;", #class = "edit-text" })
</div>
<div class="edit-item">
Edit
<div class="edit-label">#Model.UserName</div>
#Html.TextAreaFor(a => a.UserName,
new { style = "display:none;", #class = "edit-text" })
</div>
}
Now when the user clicks edit, you have to toggle the visibility of the label and hidden input and update the value of label after user done editing the value in the input element.
$(function () {
$("a[data-mode]").click(function (e) {
e.preventDefault();
var _this = $(this);
var c = _this.closest(".edit-item");
c.find(".edit-text").toggle();
c.find(".edit-label").toggle();
if (_this.attr("data-mode") === 'label') {
_this.attr("data-mode", 'edit');
_this.text("done");
} else if (_this.data("mode") === 'edit') {
c.find(".edit-label").text(c.find(".edit-text").val());
_this.text("edit");
_this.attr("data-mode", 'label');
}
});
});
This is a head start. You can optimize this code as needed.
Here is a working jsfiddle for your reference
I have a school assignment to create a one page html static.
I want to have some buttons to change the language but I don't want any addition like "index.html/en/" or "index.html?lang=en". I prefer to have it with CSS only but I don't know whether it is possible or not.
In short I just want a simply bilingual "index.html" and have buttons to change the content text.
I am new in html scripting so I'm looking for some sample code or some detailed tutorial will be help.
I suggest using JS/jQuery for that:
Have language mapping for each element that will be translated:
// Translations object:
var translations = {
'en': {
'home': 'Home',
'back': 'Back'
/* ... */
},
'lt': {
'home': 'Pradžia',
'back': 'Atgal'
/* ... */
}
};
// wait for all DOM elements to load
$(document).ready(function() {
// when button is clicked
$('.lang-btn').click(function() {
// take translations subset
var lang = translations[$(this).data('lang')];
// for each element that has "data-key" attribute
$('[data-key]').each(function() {
// change it's content to other language
$(this).text(lang[$(this).data('key')]);
})
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="my-page">
Language:
<button class="lang-btn" data-lang="en">En</button>
<button class="lang-btn" data-lang="lt">Lt</button>
<hr/>
Home
<button data-key="back">Back</button>
</div>
This code is not checking if there is such translation or not. You can improve this algo with fallback to English.
For SEO reasons I'd prefer to use /en/. Use a .htaccess file with mod_rewrite.
See here Create beautiful url’s with mod_rewrite
If it is just one page, so I assume the contain is not much. Try something simpler like:
function en() {
document.getElementById("content").innerHTML = "Example";
}
function de() {
document.getElementById("content").innerHTML = "Beispiel";
}
<div id="content">sample</div>
<button onclick="en()">English</button>
<button onclick="de()">German</button>
I have a Html page which has anchor tag, I Need to remove certain style applied already in html page for anchor tag while the html page is opened throw Iframe.
HTML Content as below:
<html>
<body>
<div>some content<a href="http://www.website.com" name="test1"/> some content </div>
</body>
</html>
I tried as below:
a[name^="test1"]:before{
content:"[prefix text]";
display:inline;
color:red;
}
a[name^="test1"]:after{
content:"suffix text";
display:inline;
color:green;
}
iframe a[name^="test1"]:before{
display:none;
}
iframe a[name^="test1"]:after{
display:none;
}
But inside "iframe" also these styles has been applying.
You have to first detect if your page is rendered inside an iframe and in that case apply an alternative CSS. It' can't be done with vanilla CSS then it has to be done with some JavaScript:
<script type="text/javascript">
function getTopWindow() {
try {
return window.top;
} catch {
// If we can't access window.top then browser is restricting
// us because of same origin policy.
return true;
}
}
function isRendererdInFrame() {
// If top window is null we may safely assume we're in iframe
return window.self !== getTopWindow();
}
function loadCss(location) {
if(document.createStyleSheet) {
document.createStyleSheet('http://server/stylesheet.css');
} else {
var styles = "#import url('" + location + "');";
var newSS=document.createElement('link');
newSS.rel='stylesheet';
newSS.href='data:text/css,'+escape(styles);
document.getElementsByTagName("head")[0].appendChild(newSS);
}
}
</script>
Code to load CSS from JavaScript is from How to load up CSS files using Javascript?.
With all that code you may simply write (even just after that inside <script> block):
var cssToLoad = isRendererdInFrame() ? "iframe.css" : "not-iframe.css";
loadCss("http://server/" + cssToLoad);
Of course same technique can be applied to patch CSS with iframe specific styles:
if (isRenderedInFrame())
loadCss("http://server/iframe-patch.css");
i dont know how to detect if page is opened in iframe or not, but there is one possible(not very nice) workaround, you can set iframe to width which is not commonly used by devices (example 463px) and then set media query for this resolution which apply when content is shown in this iframe. This is really nasty way since its not 100% and i would not recommending that.
Since I don't know much about jQuery I have am not being able to produce a dialog box on hover over a checkbox. Any suggestion would be helpful. Below is my code:
<input type="checkbox" id="employee-id" name="employeeId" onmouseover="produceDialog()">
<div id="employee-info-div"></div>
Similarly my jQuery is:
produceDialog(){
$("employee-info-div").dialog({
open : function ( event, ui ) {
$(".ui-dialog-titlebar-close").hide();
},
dialogClass : 'fixed-dialog',
resizable : false,
height : 150,
width : 250,
modal : false,
create : function ( event ) {
$(event.target).parent().css('position', 'fixed');
},
});
}
This may be the example you are looking for:
Working jsFiddle here
Below is a stand-alone example, which should just be copy/play.
Notes:
The element $('#employee-info-div'); was assigned to a variable to make code more efficient and faster to type. (More efficient b/c only check DOM once for the element, retrieve from variable after that.)
Used jQuery hover() method to open the dialog, but initialized the dialog separately (upon document ready). Note that the hover method must have two functions associated with it; the second function need not do anything but it must be there.
The hover-IN method assigned to the class $('.employee-id') runs the code $('#employee-info-div').dialog('open');, which opens the dialog. Note that the 2nd element is accessed via variable name.
Copy/Paste the following code into a separate document in your webroot and run, OR just use the above jsFiddle link to see it all in action.
<html>
<head>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script src="//ajax.googleapis.com/ajax/libs/jqueryui/1.9.1/jquery-ui.min.js"></script>
<link rel="stylesheet" href="http://code.jquery.com/ui/1.9.1/themes/base/jquery-ui.css" />
<style>
#employee-info-div{
width:40%;
float:right;
padding:5px;
background:wheat;
color:blue;
}
</style>
<script type="text/javascript">
$(document).ready(function() {
var eid = $('#employee-info-div');
var blurb = '<h2>Employee Information:</h2>Here is some example information about this employee. It can be text inserted like this, or it can be information retrieved from a database via AJAX. For simple AJAX examples, <a target="_blank" href="http://stackoverflow.com/questions/17973386/ajax-request-callback-using-jquery/17974843#17974843"> see this StackOverflow post </a> (remember to upvote any posts that are helpful to you, please.)';
function hovIn() {
$(this).css({'font-weight':'bold','color':'blue'});
eid.html(blurb);
eid.dialog('open');
}
function hovOut() {
//eid.html(''); //<-- Causes dlg text to appear/disappear as you move mouse on/off checkbox and label
$(this).css({'font-weight':'normal','color':'black'});
}
$('.employee-id').hover(hovIn, hovOut);
eid.dialog({
autoOpen:false,
title:"Your jQueryUI Dialog",
show: "fade",
hide: "fade",
width:500, //orig defaults: width: 300, height: auto
buttons: {
Ok: function() {
$(this).dialog('close');
}
}
}); //END eid.dialog
}); //END $(document).ready()
</script>
</head>
<body>
Hover over below checkbox to see hidden DIV:<br><br>
<input type="checkbox" id="employee-id" class="employee-id" name="employeeId" ><span class="employee-id">Hover over this checkbox</span>
<div id="employee-info-div"></div>
</body>
</html>
You can bind the hover event to your checkbox:
$("#employee-id").hover(function(){
// call your produceDialog function here
});
When you have a url like this www.example.com/#signup, what the browser does is just to focus it's view on the HTML element with id signup, is that right?
Is it possible to change the element's CSS style if it's focused in that way?
E.g. let's say I have a div element, with the id signup, then if I enter www.example.com, the div's background is white and if I enter www.example.com/#signup it's yellow. Like "emphasizing" the sign up form. Is this at all possible?
:target { background-color: yellow; }
The :target psuedo-class does exactly this.
You can read the window.location.hash property when the page loads and apply the corresponding css classs. Something like:
<script type='text/javascript>
function init(){
var hash = window.location.hash.substr(1);
var element = document.getElementById(hash);
if(element){
element.className += " emphasize";
}
}
</script>
<body onload="init()">
...
</body>