Three Line Menu Navicon ~ OFFICIAL CODERS : : : :

In this article I'm going to focus on the "three line" symbol (as opposed to down arrows or other possible navicons). I quite like the three line symbol as a symbol to represent menus. If we have to pick one, I'm all for this one.
We're going to look at the "how" to create this symbol in a bunch of different ways.

Use an Image

How have we put symbols onto websites for... ever? Images. There is nothing wrong with this. This image is so simple it begs for SVG. SVG means it's 1) super small file size and 2) can scale to any size crisply. The HTML would probably be:

<a href="#menu">
  <img src="menu.svg" alt="">
  Menu
</a>

If you are going to use the symbol unaccompanied by text, make sure to include the alt text.
If you have to support IE 8 and down or anything else that doesn't support SVG, you could 1) just use a PNG instead or 2) Use Modernizr to swap out the SVG for a PNG (or vice versa depending on which browser you want to penalize with an extra request).
This amounts to essentially:

if (!Modernizr.svg) {
  $("#menu").css("background-image", "url(menu.png)");
}

Use a Pseudo Element

There is nothing wrong with using an element, but if we use a pseudo element and some trickery, we could make this symbol without the extra HTTP request that an image requires. (Yeah, it could be in your sprite, but you know what I mean).

Pseudo box-shadow

Nothing but semantic markup:

<a href="#menu" class="box-shadow-menu">
  Menu
</a>

In CSS, make some space on the left of the link with some padding-left. Set the positioning context with relative positioning. Then make a single black line absolutely positioned into that space on the top left. Then using box-shadow, make two more lines beneath it.

.box-shadow-menu {
  position: relative;
  padding-left: 1.25em;
}
.box-shadow-menu:before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.25em;
  width: 1em;
  height: 0.15em;
  background: black;
  box-shadow: 
    0 0.25em 0 0 black,
    0 0.5em 0 0 black;
}

Pseudo gradient

Same markup as the one above. Same idea of creating a space for the pseudo element to go. Only this time, use gradients to create the three lines. Remember gradients don't actually need to fade color from one to another if you use "hard stops" where the color changes to another instantly at the same color-stop.

.gradient-menu {
  padding-left: 1.25em;
  position: relative;
}
.gradient-menu:before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.21em;
  bottom: 0.21em;
  width: 1em;
  background: linear-gradient(
    top, 
    black, black 20%, 
    white 20%, white 40%, 
    black 40%, black 60%, 
    white 60%, white 80%, 
    black 80%, black 100%
  );
}

Pseudo border

Created it by applying a double and a single solid border to the pseudo element. He also used pixel values in his demo. Tim Kadlec converted them to ems so they scale with text which is nice.

.border-menu {
  position: relative;
  padding-left: 1.25em;
}
.border-menu:before {
  content: "";
  position: absolute;
  top: 0.25em;
  left: 0;
  width: 1em;
  height: 0.125em;
  border-top: 0.375em double #000;
  border-bottom: 0.125em solid #000;
}

Use Fonts

There is a unicode symbol with three lines in it.

<a href="#menu">
  &#9776; Menu
</a>

You would think that would be perfect, but in reality it ends up quite blurry. Looks OK on my retina display but pretty bad on non-retina. This kind of thing should be as crisp as can be anywhere.
You could always use an icon font as well. Entypo has this symbol in their free set. The lines are rounded, which looks good to me. Pictos has one with dot-line dot-line dot-line which is also good.
I haven't had too much trouble with icon fonts being blurry like that unicode icon is. I have no clue why that it, but c'est la vie.

Which is best?

Meh. This was more exploratory fun than anything else. I don't think any of them stand way far out ahead to the point where I'd recommend one over another. For me, I'd probably end up using an icon font since I'm probably already using an icon font and then there is consistency with the rest of the project.

Demo

Here's a demo on CodePen:

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