If you click on the title `CSS (SCSS)` in CodePen (don&#39;t change the pre-processor with the gear) it will switch to the compiled CSS view.

![Codepen Screenshot of Compiled Preview][1]


  [1]: http://i.stack.imgur.com/tJnsN.png

In terminal run this command in the folder where the systlesheets are:

    sass --watch style.scss:style.css 

Source:

http://sass-lang.com/

When ever it notices a change in the `.scss` file it will update your `.css`

This only works when your `.scss` is on your local machine. Try copying the code to a file and running it locally.

**This is an online/offline solution and very easy to convert.**
[SCSS to CSS converter][1]

[![enter image description here][2]][1]


  [1]: https://sass2css.herokuapp.com/
  [2]: https://i.stack.imgur.com/33fOX.png

First of all, you have to install Ruby if it is not on your machine.

1.Open a terminal window.
2.Run the command which ruby.

If you see a path such as `/usr/bin/ruby`, Ruby is installed. If you don&#39;t see any response or get an error message, Ruby is not installed. 
To verify that you have a current version of Ruby, 
run the command `ruby -v`.

If ruby is not installed on your machine then

    sudo apt-get install ruby2.0
    sudo apt-get install ruby2.0-dev
    sudo update-alternatives --install /usr/bin/gem gem /usr/bin/gem2.0 1 

After then install Sass gem by running this command

    sudo gem install sass --no-user-install

Then copy or add any .sass file and go to that file path and then 

    sass --watch style.scss:style.css 

When ever it notices a change in the .scss file it will update your .css

This only works when your .scss is on your local machine. Try copying the code to a file and running it locally.



You can use `sass /sassFile.scss /cssFile.css`

&gt; Attention: Before using `sass` command you must install ruby and then install sass.
&gt;
&gt; For installing sass, after ruby installation type `gem install sass` in your *Terminal*
&gt;
&gt; Hint: sass compile `SCSS` files

**Install Ruby-sass using below command** &lt;br&gt;
sudo apt-get -y update &lt;br&gt;
sudo apt-get -y install ruby-full&lt;br&gt;
sudo apt install ruby-sass&lt;br&gt;
gem install bundler&lt;br&gt;

**Example**&lt;br&gt;
sass SCSS_FILE_PATH:CSS_FILE_PATH; &lt;br&gt;

e.g sass mda/at-md-black.scss:css/at-md-black.css;



Mongoose adds a &#39;__v&#39; property into Schema&#39;s for versioning - is it possible to disable this globally or globally hide it from all queries?

Mongoose __v property - hide?

I&#39;m trying to achieve a &quot;One to one&quot; relationship in a MySQL database. For example, let&#39;s say I have a Users table and an Accounts table. I want to be sure that a User can have only one Account. And that there can be only one Account per User.

I found two solutions for this but don&#39;t know what to use, and are there any other options.

### First solution:

    DROP DATABASE IF EXISTS test;
    CREATE DATABASE test CHARSET = utf8 COLLATE = utf8_general_ci;
    USE test;
    
    CREATE TABLE users(
    	id INT NOT NULL AUTO_INCREMENT,
    	user_name VARCHAR(45) NOT NULL,
    	PRIMARY KEY(id)
    ) ENGINE = InnoDB DEFAULT CHARSET = utf8;
    
    CREATE TABLE accounts(
    	id INT NOT NULL AUTO_INCREMENT,
    	account_name VARCHAR(45) NOT NULL,
    	user_id INT UNIQUE,
    	PRIMARY KEY(id),
    	FOREIGN KEY(user_id) REFERENCES users(id)
    ) ENGINE = InnoDB DEFAULT CHARSET = utf8;

In this example, I define the foreign key in accounts pointing to the primary key in users.
And then I make foreign key UNIQUE, so there can&#39;t be two identical users in accounts.
To join tables I would use this query:

    SELECT * FROM users JOIN accounts ON users.id = accounts.user_id;

### Second solution:

    DROP DATABASE IF EXISTS test;
    CREATE DATABASE test CHARSET = utf8 COLLATE = utf8_general_ci;
    USE test;
    
    CREATE TABLE users(
    	id INT NOT NULL AUTO_INCREMENT,
    	user_name VARCHAR(45) NOT NULL,
    	PRIMARY KEY(id)
    ) ENGINE = InnoDB DEFAULT CHARSET = utf8;
    
    CREATE TABLE accounts(
    	id INT NOT NULL AUTO_INCREMENT,
    	account_name VARCHAR(45) NOT NULL,
    	PRIMARY KEY(id),
    	FOREIGN KEY(id) REFERENCES users(id)
    ) ENGINE = InnoDB DEFAULT CHARSET = utf8;

In this example, I create a foreign key that points from the primary key to a primary key in another table. Since Primary Keys are UNIQUE by default, this makes this relation One to One.
To join tables I can use this:

    SELECT * FROM users JOIN accounts ON users.id = accounts.id;

Now the questions:

 - What is the best way to create One to One relation in MySQL?
 - Are there any other solutions other than these two?

I&#39;m using MySQL Workbench, and when I design One To One relation in EER diagram and let MySQL Workbench produce SQL code, I get One to Many relation :S That&#39;s what&#39;s confusing me :S

And if I import any of these solutions into MySQL Workbench EER diagram, it recognizes relations as One to Many :S That&#39;s also confusing.

So, what would be the best way to define One to One relation in MySQL DDL. And what options are there to achieve this?


MySQL - One To One Relationship?

Does anyone know how can I convert this code to standard css?
It&#39;s not working in their editor.

[http://codepen.io/andymcfee/pen/eyahr][1]


  [1]: http://codepen.io/andymcfee/pen/eyahr

Converts scss to css

<p>Does anyone know how can I convert this code to standard css?
It's not working in their editor.</p>
<p><a href="http://codepen.io/andymcfee/pen/eyahr" target="_blank" rel="noopener noreferrer">http://codepen.io/andymcfee/pen/eyahr</a></p>


I&#39;ve started using transitions to &quot;modernise&quot; the feel of a site. So far, `:hover` transitions are working great. Now I&#39;m wondering if it&#39;s possible to trigger a transition based on other things, such as when a class changes.

Here&#39;s the relevant CSS:

    #myelem {
        opacity: 0;
        display: none;
        transition: opacity 0.4s ease-in, display 0.4s step-end;
        -ms-transition: opacity 0.4s ease-in, display 0.4s step-end;
        -moz-transition: opacity 0.4s ease-in, display 0.4s step-end;
        -webkit-transition: opacity 0.4s ease-in, display 0.4s step-end;
    }
    #myelem.show {
        display: block;
        opacity: 1;
        transition: opacity 0.4s ease-out, display 0.4s step-start;
        -ms-transition: opacity 0.4s ease-out, display 0.4s step-start;
        -moz-transition: opacity 0.4s ease-out, display 0.4s step-start;
        -webkit-transition: opacity 0.4s ease-out, display 0.4s step-start;
    }

The JavaScript to trigger the change is:

    document.getElementById(&#39;myelem&#39;).className = &quot;show&quot;;

But the transition doesn&#39;t seem to be happening - it&#39;s just jumping from one state to the other.

What am I doing wrong?

CSS transition from `display: none` on class change?

I got a table-cell with fixed width and height and if text is too large, cell size should remain the same and text should be hidden by overflow:hidden.

    div {
       display: table-cell
       height: 100px;
       width: 100px;
       overflow: hidden;
       vertical-align: middle;
    }

Table-cell, however, expands beyond 100px if too much text is added. Any tricks to prevent it from expanding?


Text should be several lines in length, so &quot;white-space:nowrap&quot; solution is not applicable

How to set maximum height for table-cell?

On many smartphones (Samsung Galaxy II being an example) when you browse through a photo gallery, its blurred copy is laid out in the background. Can this be achieved by CSS dynamically (ie. without the copy of the photo being prepared upfront saved)? Is there any kind of complex CSS image filter to blur an image? 

Blurring an image via CSS?

    document.getElementById(&quot;elementId&quot;).style.display=&quot;none&quot;

is used in JavaScript to hide an element. But in jQuery,

    $(&quot;#elementId&quot;).hide();

is used for the same purpose. Which way is more efficient? I have seen a comparison between two jQuery function `.hide()` and `.css(&quot;display&quot;,&quot;none&quot;)` [here][1].

But my problem is whether pure JavaScript is more efficient than jQuery?


  [1]: https://stackoverflow.com/q/4396983/1774964

JavaScript style.display=&quot;none&quot; or jQuery .hide() is more efficient?

Is it possible for me to style every 3rd list item?

Currently in my `960px` wide div I have list of boxes which are floated left and are displayed in a 3x3 grid view. They also have a margin-right of `30px`, but because the 3rd 6th and 9th list item has this margin it makes them jump down a row making the grid display wrongly

How easy is to make the 3rd 6th and 9th not have the margin-right without having to give them a different class, or is that the only way to do it?

Styling every 3rd item of a list using CSS?

I would like to start using Compass and Sass to speed up development. At the moment, I have installed Sass on a mac and instructed it to watch a Scss file for input, and a CSS file for generated output.

From many articles, Sass is used with Compass, I&#39;m wondering why that is the case and just what does Compass add that Sass comes without? If you can give an example, the better.

What are Compass and Sass and how do they differ?

I&#39;ve been refactoring my CSS to a SASS style sheet recently. I&#39;m using the [Mindscape Web Workbench extension][1] for VS2012, which re-generates the CSS each time you save your SCSS. I started with code similar to this:

&lt;!-- language-all: css --&gt;

    /* Starting point: */
    h1 { font-size: 1.5em; /* 24px &#247; 16px */ }

Then I tried to refactor it first to this:

    /* Recfator: */
    h1 { font-size: (24px / 16px)em; }

But this unfortunately produces:

    /* Result: */
    h1 { font-size: 1.5 em; }              /* doesn&#39;t work, gives &quot;1.5 em&quot; */

Notice the **extra space**, which I don&#39;t want there. I&#39;ve tried several alternatives, here are a few:

    h1 { font-size: (24/16)em; }           /* doesn&#39;t work, gives &quot;1.5 em&quot; */
    h2 { font-size: 24 / 16em; }           /* doesn&#39;t work, gives &quot;24/16em&quot; */
    h3 { font-size: (24px / 16px) * 1em; } /* works but &quot;* 1 em&quot; feels unnecessary */
    h4 { font-size: (24em) / 16; }         /* works, but without &quot;px&quot; it&#39;s not 
                                              really conveying what I mean to say */

I&#39;ve also tried these variants with variables (because I want those anyways), but that didn&#39;t change the situation much. To keep the examples in this question sleek I&#39;ve left out variables. However, I&#39;d happily accept a solution that relies on using variables (in a clean way).

I&#39;ve gone through the [relevant SASS documenation on &#39;/&#39;][2], and appreciate that this is a tough one for SASS because the &#39;/&#39; character already has a meaning in basic CSS. Either way, I was hoping for a clean solution. Am I missing something here?

PS. [This blogpost][3] does offer one solution, using a user defined function. That seems a bit heavy-weight though, so I&#39;m interested if there&#39;s &quot;cleaner&quot; solutions in line with my attempts above. If someone can explain the &quot;function approach&quot; is the better (or even only) solution then I&#39;ll accept that as an answer too.

PS. [This related question][4] seems to be about the same thing, though that one specically wants to do further calculations. [The accepted answer there][5] is my third workaround (multiplying by `1em`), but I&#39;d love to know if there&#39;s a different (cleaner) way if I&#39;m willing to forego the ability to do further calculations. Perhaps the method mentioned in said question (&quot;interpolation&quot;) is useful for me?

----------
***Bottom line:** how can you cleanly append the unit type (e.g. `em`) to the result of a calculation in SASS?*


  [1]: http://visualstudiogallery.msdn.microsoft.com/2b96d16a-c986-4501-8f97-8008f9db141a
  [2]: http://sass-lang.com/docs/yardoc/file.SASS_REFERENCE.html#division-and-slash
  [3]: http://erskinelabs.com/calculating-ems-scss/
  [4]: https://stackoverflow.com/q/15513395/419956
  [5]: https://stackoverflow.com/a/15514279/419956

Append unit type to the result of a calculation in Sass

I would like to include a sass compiler in my Flask application. Is there a generally accepted way of doing this?

Using sass with Flask and jinja2

I have an item class and a compact &quot;modifier&quot; class:

    .item { ... }
    .item.compact { /* styles to make .item smaller */ }

This is fine. However, I&#39;d like to add a `@media` query that forces the `.item` class to be compact when the screen is small enough.

On first thought, this is what I tried to do:

    .item { ... }
    .item.compact { ... }
    @media (max-width: 600px) {
      .item { @extend .item.compact; }
    }

But this generates the following error:

&gt; You may not @extend an outer selector from within @media. You may only
&gt; @extend selectors within the same directive.


How would I accomplish this using SASS without having to resort to copy/pasting styles?

Extending selectors from within media queries with Sass

I have started trying out Sass for my css work. In the directory where my Css file resides I see a &#39;.sass-cache&#39; folder too. Can any one tell me why is this folder created and is it safe if I delete it.

thanks,

Content Type	Original Author	Original Content on Stackoverflow
Question	Barbara	View Question on Stackoverflow
Solution 1 - Css	y8r	View Answer on Stackoverflow
Solution 2 - Css	joshuahornby10	View Answer on Stackoverflow
Solution 3 - Css	0xdw	View Answer on Stackoverflow
Solution 4 - Css	Rahi.Shah	View Answer on Stackoverflow
Solution 5 - Css	AmerllicA	View Answer on Stackoverflow
Solution 6 - Css	Sagar Jadhav	View Answer on Stackoverflow

Converts scss to css

Css Problem Overview

Css Solutions

Solution 1 - Css

Solution 2 - Css

Solution 3 - Css

Solution 4 - Css

Solution 5 - Css

Solution 6 - Css

MySQL - One To One Relationship?

Mongoose __v property - hide?

Attributions