Scalable vector ember

Scalable Vector Ember
Death to HTML. Long live the DOM.

@mixonic
httP://madhatted.com
matt.beale@madhatted.com

201 Created
We build õ-age apps with Ember.js. We take
teams from £ to • in no time flat.

1 <svg>
2 {{#each d in paths}}
3 <path {{bind-attr d=d}} />
4 {{/each}}
5 </svg>

http://emberjs.jsbin.com/woxes/10/edit
1.7: http://emberjs.jsbin.com/woxes/9
!
1.8: http://emberjs.jsbin.com/woxes/10

Benefits of Raster Graphics
• Small file-size (photos)
• Computationally simple to
render

Vector Graphic (SVG)
1 <?xml version="1.0" standalone="no"?>
2 <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
3 "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
4 <svg width="12cm" height="4cm" viewBox="0 0 1200 400"
5 xmlns="http://www.w3.org/2000/svg" version="1.1">
6 <desc>Example rect01 - rectangle with sharp corners</desc>
7
8 <rect x="400" y="100" width="400" height="200"
9 fill="yellow" stroke="navy" stroke-width="10" />
10 </svg>
w3.org

Benefits of Vector Graphics
• Small file-size (graphics)
• Arbitrary resolution

Part I
Scalable Vector Graphics

Why are we talking about this in 2014?

1998 Vector Markup Language proposed
by Macromedia, Microsoft. PGML
proposed by Adobe, Sun. W3C kick off
SVG.
2001 SVG 1.0
2003 SVG 1.1

Benefits of SVG Standard
• Easy-to-parse metadata
• Links
• Animation

SVG.
2001 SVG 1.0
2003 SVG 1.1
2004 Konqueror 3.2 support
2005 Gecko (Firefox) support
2006 WebKit (Chrome, Safari) support

SVG.
2001 SVG 1.0
2003 SVG 1.1
2004 Konqueror 3.2 support
2005 Gecko (Firefox) support
2006 WebKit (Chrome, Safari) support
2011 IE9 is the last platform to support SVG

0.5% Woo!
(almost)
w3techs.com

( ๑‾̀◡‾́)σ»
(´⊙ω⊙`)
w3techs.com

3 ways to use SVG
logo.svg
<svg>
document.createElementNS

Creating elements with a namespace
1 var svg = document.createElementNS("http://www.w3.org/2000/svg", "svg");
2 svg.setAttribute("viewBox", "0 0 1200 400");
3 svg.setAttribute("width", "12cm");
4 svg.setAttribute("height", "4cm");
5 var path = document.createElementNS("http://www.w3.org/2000/svg", "path");
6 path.setAttribute("x", "400");
7 path.setAttribute("y", "100");
8 path.setAttribute("width", "400");
9 path.setAttribute("height", "200");
10 path.setAttribute("fill", "yellow");
11 path.setAttribute("stroke", "navy");
12 path.setAttribute("stroke-width", "10");
13 svg.appendChild(path);
14 document.body.appendChild(svg);

Setting SVG attributes
• Attributes are case sensitive
1 var div = document.createElement("div");
2 div.setAttribute("someWacky", "foo");
3 div.getAttribute("someWacky"); // => "foo"
4 div.getAttribute("somewacky"); // => "foo"
5
6 var svg = document.createElementNS(svgNS, "svg");
7 svg.setAttribute("someWow", "boo")
8 svg.getAttribute("someWow"); // => "boo"
9 svg.getAttribute("somewow"); // => null
• Property values are not primitives
1 svg.viewBox; // => SVGAnimatedRect {animVal: SVGRect, baseVal: SVGRect}
2 var viewBox = new SVGAnimatedRect(); // => TypeError: Illegal constructor
3 svg.viewBox = "0 0 100 100";
4 svg.getAttribute("viewBox"); // => null

Changing namespaces
1 <div>
2 <span></span>
3 <svg>
4 <path></path>
5 <foreignObject>
6 <div></div>
7 </foreignObject>
8 </svg>
9 </div>
Entrance to namespace dictated by next element
Exit from namespace dictated by previous element

Part II
Old Man Ember, Young Man Ember

A template
1 <section>
2 {{if isShowing}}
3 <span>Howdy!</span>
4 {{/if}}
5 </section>

Ember.js pre-1.8
1 var buffer = "<section>n";
2 buffer += "<script metamorph-0-start></script>";
3 if (isShowing) {
4 buffer += " <span>Howdy!</span>n";
5 }
6 buffer += "<script metamorph-0-end></script>";
7 buffer += "</section>";
8
9 rootElement.innerHTML = buffer;

Ember.js pre-1.8
1 var
2 buffer
3 if (isShowing) {
4 buffer
5 }
6 buffer
7 buffer
8
9 rootElement.innerHTML
STRINGS, INNERHTML

Ember.js 1.10
1 var outerChilden = [document.createElement('section')];
2
3 var innerChildren;
4 if (isShowing) {
5 innerChildren = [document.createElement('span');]
6 innerChildren[0].appendChild(document.createTextNode('Howdy!'));
7 while (innerChildren[0]) {
8 outerChilden[0].appendChild(innerChildren[0]);
9 }
10 }
11
12 while (outerChilden[0]) {
13 rootElement.appendChild(outerChilden[0]);
14 }

Ember.js 1.10
1 var
2
3 var
4 if (isShowing) {
5 innerChildren
6 innerChildren[
7 while (innerChildren[
8 outerChilden[
9 }
10 }
11
12 while (outerChilden[
13 rootElement.appendChild(outerChilden[
14 }
DOM! HTMLBARS! WOOOMG!

Ember.js 1.8-1.9
1 var buffer, parsingNode;
2
3 buffer = "<section>n</section>";
4 parsingNode = document.createElement('div');
5 parsingNode.innerHTML = buffer;
6 var outerChilden = parsingNode.childNodes;
7
8 if (isShowing) {
9 buffer = " <span>Howdy!</span>n";
10 parsingNode.innerHTML = buffer;
11 var innerChildren = parsingNode.childNodes;
12 while (innerChildren[0]) {
13 outerChilden[0].appendChild(innerChildren[0]);
14 }
15 }
16
17 while (outerChilden[0]) {
18 rootElement.appendChild(outerChilden[0]);
19 }

Ember.js 1.8-1.9
1 var
2
3 buffer
4 parsingNode
5 parsingNode.innerHTML
6 var
7
8 if (isShowing) {
9 buffer
10 parsingNode.innerHTML
11
12 while (innerChildren[
13 outerChilden[
14 }
15 }
16
17 while (outerChilden[
18 rootElement.appendChild(outerChilden[
19 }
STRING TEMPLATES, DOM for stitching

Tricky stuff in 1.8+
• managing a context
• detecting a namespace
!

1 var string = handlebarsTemplate(context, options);
2 var nodes = domHelper.parseHTML(string, morph.contextualElement);
3
4 var node;
5 while (node = nodes[0]) {
6 rootElement.appendChild(node);
7 }

HTMLBARS, Tricky stuff in 1.8+
1.10
1 var nodes = htmlbarsTemplate(context, env, morph.contextualElement);
2
3 var node;
4 while (node = nodes[0]) {
5 rootElement.appendChild(node);
6 }

1 var root = document.createElement('div');
2
3 root.innerHTML = "<svg><foreignObject><div></div></foreignObject></svg>";
4
5 var svg = div.firstChild;
6 var foreignObject = svg.firstChild;
7 var div = foreignObject.firstChild;
8
9 svg.namespaceURI; // http://www.w3.org/2000/svg
10 foreignObject.namespaceURI; // http://www.w3.org/2000/svg
11 div.namespaceURI; // undefined

1 var root = document.createElementNS(svgNs, 'svg');!
2 !
3 root.innerHTML = "<foreignObject><div></div></foreignObject>";!
4 !
5 var foreignObject = root.firstChild;!
6 var div = foreignObject.firstChild;!
7 !
8 svg.namespaceURI; // http://www.w3.org/2000/svg!
9 foreignObject.namespaceURI; // http://www.w3.org/2000/svg!
10 div.namespaceURI; // undefined!

Tricky stuff in 1.8+ HTMLBARS, 1.10
1 var template = htmlbarsCompile(
2 "<foreignObject><div></div></foreignObject>"
3 );
4 // so long as contextualElement is an SVG tag...
5 var nodes = template(context, env, morph.contextualElement);
6
7 var foreignObject = nodes[0];
8 var div = foreignObject.firstChild;
9
10 foreignObject.namespaceURI; // http://www.w3.org/2000/svg
11 div.namespaceURI; // undefined

Part III
Death to HTML. Long live the DOM.

HTML is transmitted as a string.

• JS String (.jst, Ember <1.10)
• HTML (Angular, Polymer)
• JavaScript (React, Ember > 1.9,
Mithril)

But that doesn’t mean we should process it as a string.

• innerHTML (.jst, Ember <1.10)
• DOM (Angular, React, Ember > 1.9,
Polymer, Mithril)

transmit strings
!
process DOM

CONTROLLERS LEFT
!
YEHUDA’S RIGHT

Scalable vector ember

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