Setting DIV width and height in JavaScript - javascript

I have a div with id="div_register". I want to set its width dynamically in JavaScript.
I am using this following code:
getElementById('div_register').style.width=500;
but this line of code isn't working.
I also tried using the units px like the following, still no luck:
getElementById('div_register').style.width='500px';
and
getElementById('div_register').style.width='500';
and
getElementById('div_register').style.width=500px;
but none of this code is working for me.
I don't know what's going wrong.
I am using Mozilla Firefox.
EDIT
<html>
<head>
<title>Untitled</title>
<script>
function show_update_profile() {
document.getElementById('black_fade').style.display='block';
//document.getElementById.('div_register').style.left=((window.innerWidth)-500)/20;
document.getElementById('div_register').style.height= "500px";
document.getElementById('div_register').style.width= '500px';
//alert('kutta');
document.getElementById('div_register').style.display='block';
document.getElementById('register_flag').value= 1;
document.getElementById('physical_flag').value= 0;
document.getElementById('cultural_flag').value= 0;
document.getElementById('professional_flag').value= 0;
document.getElementById('lifestyle_flag').value= 0;
document.getElementById('hobby_flag').value= 0;
//alert(window.innerWidth);
}
</script>
<style>
.white_content {
display:none;
}
</style>
</head>
<body>
<div id="main">
<input type="button" onclick="javascript:show_update_profile();" id="show" name="show" value="show"/>
</div>
<div id="div_register">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td>
welcome
</td>
</tr>
</table>
</div>
</body>
</html>

The properties you're using may not work in Firefox, Chrome, and other non-IE browsers. To make this work in all browsers, I also suggest adding the following:
document.getElementById('div_register').setAttribute("style","width:500px");
For cross-compatibility, you will still need to use the property. Order may also matter. For instance, in my code, when setting style properties with JavaScript, I set the style attribute first, then I set the properties:
document.getElementById("mydiv").setAttribute("style","display:block;cursor:pointer;cursor:hand;");
document.getElementById("mydiv").style.display = "block";
document.getElementById("mydiv").style.cursor = "hand";
Thus, the most cross-browser compatible example for you would be:
document.getElementById('div_register').setAttribute("style","display:block;width:500px");
document.getElementById('div_register').style.width='500px';
I also want to point out that a much easier method of managing styles is to use a CSS class selector and put your styles in external CSS files. Not only will your code be much more maintainable, but you'll actually make friends with your Web designers!
document.getElementById("div_register").setAttribute("class","wide");
.wide {
display:block;
width:500px;
}
.hide {
display:none;
}
.narrow {
display:block;
width:100px;
}
Now, I can easily just add and remove a class attribute, one single property, instead of calling multiple properties. In addition, when your Web designer wants to change the definition of what it means to be wide, he or she does not need to go poking around in your beautifully maintained JavaScript code. Your JavaScript code remains untouched, yet the theme of your application can be easily customized.
This technique follows the rule of separating your content (HTML) from your behavior (JavaScript), and your presentation (CSS).

These are several ways to apply style to an element. Try any one of the examples below:
1. document.getElementById('div_register').className = 'wide';
/* CSS */ .wide{width:500px;}
2. document.getElementById('div_register').setAttribute('class','wide');
3. document.getElementById('div_register').style.width = '500px';

Fix the typos in your code (document is spelled wrong on lines 3 & 4 of your function, and change the onclick event handler to read: onclick="show_update_profile()" and you'll be fine. #jmort's advice is good - simply set up 2 css classes that you switch between in javascript - it'll make things easier.
You might also check out element.addEventListener for assigning event handlers to your elements.

The onclick attribute of a button takes a string of JavaScript, not an href like you provided. Just remove the "javascript:" part.

If you remove the javascript: prefix and remove the parts for the unknown ids like 'black_fade' from your javascript code, this should work in firefox
Condensed example:
<html>
<head>
<script type="text/javascript">
function show_update_profile() {
document.getElementById('div_register').style.height= "500px";
document.getElementById('div_register').style.width= "500px";
document.getElementById('div_register').style.display='block';
return true;
}
</script>
<style>
/* just to show dimensions of div */
#div_register
{
background-color: #cfc;
}
</style>
</head>
<body>
<div id="main">
<input type="button" onclick="show_update_profile();" value="show"/>
</div>
<div id="div_register">
<table>
<tr>
<td>
welcome
</td>
</tr>
</table>
</div>
</body>
</html>

Be careful of span!
myspan.styles.width='100px' doesn't want to work.
Change the span to a div.

You have to use document. The Document interface represents any web page loaded in the browser and serves as an entry point into the web page's content,
know more
document.getElementById('div_register').style.width='500px';

Related

Changing language with toggle button bootstrap

I'm learning to code with bootstrap, html, css, js. And I'm wondering if it's possible to modify the language of my webpage with a toggle button?
I'm using bootstrap toggle which can set events like this:
<input id="toggle-event" type="checkbox" data-toggle="toggle">
<div id="console-event"></div>
<script>
$(function() {
$('#toggle-event').change(function() {
$('#console-event').html('Toggle: ' + $(this).prop('checked'))
})
})
</script>
And I also saw this thread on stack about changing languageusing element.lang.
And I'm not able to 'mix' the two methods to change the language on deman simply by clicking on the toggle button, and I don't understand why =/
Here's my attempt:
<script src="js/jquery-3.2.1.min.js"></script>
<script src="js/bootstrap.min.js"></script>
<script src="js/bootstrap-toggle.min.js"></script>
<body class="fr" id="test1">
<p lang="en">
Je parle la baguette
</p>
<p lang="fr">
I speak the baguette
</p>
<input id="toggle-event" type="checkbox" checked data-toggle="toggle" data-size="large" data-onstyle="info" data-offstyle="info" data-on="Fr" data-off="En">
<!--<script>
$(function() {
$('#toggle-event').bootstrapToggle({
on: document.body.className= 'fr',
off: document.body.className = 'en'
});
})
</script>-->
<script>
$(function() {
$('#toggle-event').change(function() {
$('#test1').body('Toggle: ' + $(this).prop('checked')).className='en'
});
});
</script>
</body>
CSS:
body.en :lang(en) {
display: none;
}
body.fr :lang(fr){
display: none;
}
https://jsfiddle.net/mttkchfc/1/
There are a number of issues with your attempt.
The most obvious one is that the languages are the wrong way round. Your "en" section contains French text, and the "fr" one contains English text!
The CSS is also mangled compared to the example you cited - look more carefully at how the :lang part is constructed in the original. In the original example, it is used to hide the opposite language, whereas you're using it to hide the same language. You've got the concept the wrong way round.
Also, this line is total nonsense:
$('#test1').body('Toggle: ' + $(this).prop('checked')).className='en'
There's no such jQuery function as ".body" - if you look in your browser console (press F12, if you didn't know, to open the Developer Tools in most modern desktop browsers), you'll see this error reported when you click on the toggle.
"classname" is a native JS property, it doesn't work on jQuery objects, which this would be if it was valid
If it was possible to use a function like "body" to set the body content, all it would do is set the content of the whole <body> section to "Toggle: true", or similar. This would be useless.
Even if all of that were to be ignored, and it were capable of setting the class, it only ever sets it to English - you wouldn't be able to change back to French.
The example in the link you gave, using document.body.className works perfectly well. You just need to vary the class name depending on whether the toggle is on or off. I have chosen to store the class names in data- attribute values "true" and "false", which of course correspond to the string representation of a boolean. This means we can neatly use the value of the "checked" property of the toggle to fetch the correct data- attribute value and use that as the new class name, without any tedious if or switch statements:
CSS
body.en :lang(fr) {
display: none;
}
body.fr :lang(en){
display: none;
}
HTML
<body class="en">
<p lang="fr">
Je parle la baguette
</p>
<p lang="en">
I speak the baguette
</p>
<input id="toggle-event" type="checkbox" checked data-toggle="toggle" data-size="large" data-onstyle="info" data-offstyle="info" data-on="English" data-off="French" data-true="en" data-false="fr" >
</body>
JS
$(function() {
$('#toggle-event').change(function() {
document.body.className = $(this).data($(this).prop("checked").toString());
});
});
P.S. Your JSFiddle didn't work at all because you didn't include jQuery, your scripts were in the wrong section, and you have to reference bootstrap etc as external resources - the inline links you provided were pointing to local resources which don't exist in a JSFiddle environment. I've fixed that for you, plus updated it so it works as you intend:
https://jsfiddle.net/mttkchfc/4/

(HTML)Cant store the browser height into variable and use the same in a class which is used for a div?

How do I get the height of the browser window in jquery and use that in a class in CSS.I used this code but it doesn't work , some modifications are needed
<style>
.browserHeight
{
height:h ;
}
</style>
<body>
<div class="container browserHeight"> ANOTHER PAGE
</div>
</body>
<script>
var h=$(window).height()+"px";
</script>
You can't pass a variable into CSS like this. However, using jquery, you can add CSS to an element.
Remove the style part altogether.
Your <script> becomes:
var h=$(window).height();
$('.browserHeight').css("height",h);
Note that I removed the +"px" part from where you define h.

Is it possible to position a div on top of another starting from the bottom using CSS?

I have a chat window made using HTML, CSS & JS. I want to position the message from bottom to top.
Example:
first message div at the bottom, 2nd message div on top of first an so on. Is it possible?
I can't imagine a pure CSS solution. But Using jQuery, if you already have this library for your project, you could write something this:
$(':button').click(function() {
var message = $('input[type=text]').val();
$('#chat').prepend('<div class="line">'+message);
});
Demo: http://jsfiddle.net/Vbd67/1/
**I changed the append to prepend according to the comment
I know that this is not an answer to your question, rather this is a better option that you should consider implementing in the chat window.
Newest comment should be at the bottom, that is how most basic chat windows work.
Next thing, you can do this all using css:
because such a design requires either use of table rows or list elements
Obviously you have to use javascript for using ajax, so that you can asynchronously fetch user records like messages and profile pic etc
CSS:
<style type="text/css">
table#chat_window {
}
tr#message_row {
}
td#profile_pic {
}
td#message {
}
</style>
HTML STRUCTURE:
<table id="chat_window">
<tr id="message_row">
<td id="profile_pic"></td>
<td id="message"></td>
</tr>
</table>
OR USING LISTS:
<ul id="chat_window">
<li id="message_row">
<div id="profile_pic"></div>
<div id="message"></div>
</li>
</ul>
Now you have to just using javascript:ajax to fetch values and add a child:
If you are using table based chat-window, then you have to fetch the table id using javascript and add row element <tr> per value/message that you fetch.
If you are using list based chat-window, then you have to fetch the list id using javascript and add list element <li> per value/message that you fetch.
I am sorry if there are any typos I have less time.
You can do this using jQuery like;
var first = $('div > div:first-child');
first.appendTo(first.parent());
To deal with several elements, you can do this:
$('div > div').each(function() {
$(this).prependTo(this.parentNode);
});
Here is a working Live Demo.
You should use a combination of display:table-cell and vertical-align:bottom.
I use Sotiris's fiddle and fixed its CSS.
The HTML is
<div style="display:table; height:200px;">
<div style="display:table-row">
<div id="chat" style="width:400px; border:1px solid black;display:table-cell; vertical-align:bottom">
</div>
</div>
</div>
<input type="text"><input type="button" value="post">
​
And this is the JavaScript code
$(':button').click(function() {
var message = $('input[type=text]').val();
$('#chat').append( $('<div/>').text(message) );
});
​
Please let me know if there is a problem.
This is the fiddle
I kept searching for a better solution because table layout is always suspicious to me, but I found css-tricks article about it and they do the same as I do.. so I guess this solution is the right one.
ADDING - keep scroll to bottom code
Since new messages are coming at the bottom, we need to keep scroll to bottom.
I updated the fiddle link

How to style a Javascript snippet

I want to embed this Javascript snippet (webform from AWeber) into my website:
<script type="text/javascript" src="http://forms.aweber.com/form/49/522310949.js"></script>
My site uses the style p { line-height: 1.5em; }. Unfortunately this is also applied to the Javascript snippet and makes it look stupid.
How can I tell the Javascript snippet to use a line-height of 1em instead of 1.5em?
I tried this but it doesn't work:
<p style="line-height: 1em;">
<script type="text/javascript" src="http://forms.aweber.com/form/49/522310949.js"
</script>
</p>
I also considered using Javascript (document.getElementById('p').style.lineHeight = '1 em';) to change the CSS, but as I understand Javascript modifies the whole website and not only one element...
Can you please help?
Thanks in advance!
div.af-form {
line-height: 1em;
}
In case you need more styling, I see that your generated block also uses these styles: af-header, af-body, af-footer, af-element and af-textWrap.
However, if you need a more universal solution, refer to #Pointy's answer.
Putting the form inside a <p> does not make sense, as <p> cannot contain block-level elements. Use a <div> instead:
<div style='line-height: 1em;'>
<script src = " ... "></script>
</div>
As #Max implicitly noted, it'd be "nicer" to add CSS to style the content.
You can use Firebug or the Chrome/Safari developer tools to examine the styles of "live" page elements. That can help you figure out the reasons that particular elements look a particular way, and it also lets you play around with alterations to the styles.
edit maybe something like:
div.af-form p { line-height: 1em; }

Append data to css class - jQuery string operation

Please take a look at the following html.
EDIT: UPDATED THE HTML PART
<div id="html_editor">
<head>
<style type="text/css" >
.blog
{
border:2px solid grey;
width:auto;
}
<style>{customcss}</style>
</style>
</head>
</html>
</div>
Please take a look at the Css Class 'blog',i want to add some other values to that class through js/jQuery.
Actually it is a HTML editor ,on the body tag user selecting a the 'blog' element,so that time i want to give the user to set CSS for the blog,user changing the CSS on a text area,after that i want to append/rewrite the data to that 'blog' class.
Ex : user setting the class like the following
width:250px;
background:red;
key:value..etc..
so after that i want to change that 'blog' css class to
.blog
{
width:250px;
background:red;
key:value..etc..
}
How can i achieve this ? is there any way by using jQuery ??
UPDATE : Please check this image.
Thank you.
For an HTML like this:
<style id="mycss" type="text/css" >
.blog
{
border:2px solid grey;
color:black;
}
</style>
<div class="blog">This is a blog</div>
Try this js:
var style = document.getElementById("mycss");
newrule = document.createTextNode('.blog { color:red;}');
style.appendChild(newrule);
This isn't very efficient as it overrides the previous rule, but you can get the general method.
JSFiddle here
I went ahead and did the following test because I haven't done JavaScript in a while and I wanted to give it a go. The first method uses String.split to parse the textarea input and the second some basic regex. The regex will fail if there's more than one statement per line. They both put a syntax burden on the user greater than native CSS, so:
I think you should do what nikan suggested.
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src="http://www.google.com/jsapi"></script>
<script type="text/javascript">
google.load("jquery", '1.6.4');
console.debug('loading');
google.setOnLoadCallback(function() {
var input = $('#userinput').val();
var statements = input.split(';');
for (var statement in statements){
var style = statements[statement].split(':');
var name = $.trim(style[0]);
var value = $.trim(style[1]);
$('#target').css(name, value);
}
var very_basic_css_matching = /^ *([^:]+): *([^;]+);/gm;
while (matches = very_basic_css_matching.exec(input)){
$('#target').css(matches[1], matches[2]);
}
});
</script>
</head>
<body>
<textarea id="userinput">
width:250px;
height:10px;
background:red;
</textarea>
<div id="target">
</div>
</body>
</html>
With jquery is easy to access the current style and modify it:
http://jsfiddle.net/jedSP/7/
Try writing "color:white" or "background:green" in the text area, works in all browsers. When the user is done just use $("#style").html() to get the current CSS.
EDITED: Updated link... like this?
if you want this to happen in real time, its as easy as taking the value of the textarea and parsing it in javascript, and then applying the values with jquery like so
$('.blog').css({'property1':'value1','property2':'value2'});
now if you want to save these changes permanently, you will need to send the new css values to your server and store them in a database or something.
EDIT: to save it on the database...
You can get the value from the textfield like so.
var cssVal = $('#textfieldid').val();
And then use the jQuery ajax function to send the new value to your server.
http://api.jquery.com/jQuery.ajax/
I'm not going to go into all of the details of this, you can find database tutorials everywhere online, but then you want to take the value of that textfield that you sent to your server using jQuery, and save it in your database table that stores the css rule properties.
Then when you regenerate the page, you will just retrieve the new css value from your database.

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