Created
February 16, 2016 18:57
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<!DOCTYPE html> | |
<html> | |
<head> | |
<title></title> | |
</head> | |
<body> | |
<div id="output_h"></div> | |
<div id="output_v"></div> | |
<script src="virtual-dom.js"></script> | |
<script src="https://cdnjs.cloudflare.com/ajax/libs/handlebars.js/4.0.5/handlebars.min.js"></script> | |
<script id="handlebars_template" type="text/x-handlebars-template"> | |
<div class="list" data-id="{{id}}"> | |
<ul> | |
{{#each items}} | |
<li>{{text}}</li> | |
{{/each}} | |
</ul> | |
</div> | |
</script> | |
<script> | |
window.onload = function() { | |
var h = virtualDom.h; | |
var diff = virtualDom.diff; | |
var createElement = virtualDom.create; | |
var patch = virtualDom.patch; | |
var h_config = { | |
container: document.querySelector('#output_h'), | |
render: function(data) { | |
var html = this.template(data); | |
this.container.innerHTML = html; | |
}, | |
template: null, | |
setUp: function() { | |
var h_template_html = document.querySelector('#handlebars_template').innerHTML; | |
this.template = Handlebars.compile(h_template_html); | |
}, | |
}; | |
var v_config = { | |
_prev_tree: null, | |
_root_node: null, | |
container: document.querySelector('#output_v'), | |
render: function(data) { | |
var tree = this.template(data); | |
this.root_node = this.root_node || createElement(tree); | |
if (this._prev_tree) { | |
var patches = diff(this._prev_tree, tree); | |
this.root_node = patch(this.root_node, patches); | |
} else { | |
this.container.appendChild(this.root_node); | |
} | |
this._prev_tree = tree; | |
}, | |
template: function(data) { | |
return h('.list', { attributes: { 'data-id': data.id } }, [ | |
h('ul', [ | |
data.items.map(function(item) { | |
return h('li', [item.text]); | |
}), | |
]), | |
]); | |
}, | |
setUp: function() {}, | |
}; | |
var data = { | |
id: 123, | |
items: [ | |
{ text: 'one' }, | |
{ text: 'two' }, | |
{ text: 'three' }, | |
{ text: 'four' }, | |
{ text: 'five' }, | |
] | |
}; | |
var data_diff = { | |
id: 123, | |
items: [ | |
{ text: 'one' }, | |
{ text: 'two' }, | |
{ text: 'four' }, | |
{ text: 'six' }, | |
] | |
}; | |
function _testRender(name, config, iterations) { | |
config.setUp(); | |
console.time(name); | |
for (var i = 0; i < iterations; i++) { | |
if (i % 2 == 0) { | |
config.render(data); | |
} else { | |
config.render(data_diff); | |
} | |
} | |
console.timeEnd(name); | |
} | |
console.log('10 ITERATIONS ================='); | |
_testRender('Handlebars', h_config, 10); | |
_testRender('Virtual DOM', v_config, 10); | |
console.log('100 ITERATIONS ================='); | |
_testRender('Handlebars', h_config, 100); | |
_testRender('Virtual DOM', v_config, 100); | |
console.log('1000 ITERATIONS ================='); | |
_testRender('Handlebars', h_config, 1000); | |
_testRender('Virtual DOM', v_config, 1000); | |
}; | |
</script> | |
</body> | |
</html> |
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