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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title></title>
<script src="../../dist/vue.min.js"></script>
<link rel="stylesheet" href="style.css">
<link rel="stylesheet" href="demo.css">
</head>
<body>
<div id="el">
<h1>Rendering Dynamic Big Table</h1>
<p>Reference: <a href="http://insin.github.io/ui-lib-samples/large-datasets/index.html">insin/ui-lib-samples/large-datasets</a></p>
<p>
<span>{{ rows }} x {{ cols }}, {{ optimized ? 'with' : 'without' }} optimization. {{ msg }}</span>
</p>
<p>
<button v-if="optimized" @click="loadBase">Disable optimization</button>
<button v-else @click="loadOptimized">Enable optimization (Object.freeze)</button>
<button @click="unmount">Unmount</button>
<button @click="rerender">Rerender with fresh data</button>
</p>
<form>
<strong>Filter Data</strong>:
<input type="text" v-model="filter">
<!--
If the user is filtering the data, we want to offer some insight into
the breadth of the filtering.
-->
<span v-if="filter">
—
Filtering <strong>{{ filter }}</strong>
over {{ dataPoints }} data points,
{{ visibleCount() }} found.
</span>
</form>
<table width="100%" cellspacing="2" :class="{ filtered: filter }">
<tr v-for="row in grid">
<th>{{ row.id }}</th>
<td v-for="item in row.items"
class="item"
:class="{ hidden: !matches(item) }">
{{ item.value }}
</td>
</tr>
</table>
</div>
<script>
var ROWS = 1000
var COLS = 10
var OPTIMIZED = window.location.hash === '#optimized'
window.onhashchange = function () {
window.location.reload()
}
function generateGrid( rowCount, columnCount ) {
var valuePoints = [
"Daenerys", "Jon", "Sansa", "Arya", "Stannis", "Gregor", "Tyrion",
"Theon", "Joffrey", "Ramsay", "Cersei", "Bran", "Margaery",
"Melisandre", "Daario", "Jamie", "Eddard", "Myrcella", "Robb",
"Jorah", "Petyr", "Tommen", "Sandor", "Oberyn", "Drogo", "Ygritte"
]
var valueIndex = 0
var grid = []
for ( var r = 0; r < rowCount; r++ ) {
var row = {
id: r,
items: []
}
for ( var c = 0; c < columnCount; c++ ) {
row.items.push({
id: ( r + "-" + c ),
value: valuePoints[ valueIndex ]
})
if ( ++valueIndex >= valuePoints.length ) {
valueIndex = 0
}
}
grid.push(row)
}
return OPTIMIZED ? Object.freeze(grid) : grid
}
var grid = generateGrid(ROWS, COLS)
var s = window.performance.now()
console.profile('a')
var vm = new Vue({
el: '#el',
data: {
cols: COLS,
rows: ROWS,
optimized: OPTIMIZED,
msg: 'loading...',
grid: grid,
dataPoints: grid.length * grid[0].items.length,
filter: ''
},
methods: {
matches: function (item) {
return item.value.toLowerCase().indexOf(this.filter.toLowerCase()) > -1
},
visibleCount: function () {
var count = 0
var grid = this.grid
for (var i = 0, l = grid.length; i < l; i++) {
var row = grid[i].items
for (var j = 0, k = row.length; j < k; j++) {
var item = row[j]
var matched = !this.filter || this.matches(item)
if (matched) {
count++
}
}
}
return count
},
loadBase: function () {
window.location.hash = ''
},
loadOptimized: function () {
window.location.hash = '#optimized'
},
unmount: function () {
console.profile('unmount')
var s = window.performance.now()
this.grid = []
setTimeout(function () {
vm.msg = 'umount took: ' + (window.performance.now() - s).toFixed(2) + 'ms'
console.profileEnd('unmount')
}, 0)
},
rerender: function () {
var grid = generateGrid(1000, 10)
var s = window.performance.now()
console.profile('rerender')
this.grid = grid
setTimeout(function () {
vm.msg = 'rerender took: ' + (window.performance.now() - s).toFixed(2) + 'ms'
console.profileEnd('rerender')
}, 0)
}
}
})
console.profileEnd('a')
setTimeout(function () {
vm.msg = 'initial render took: ' + (window.performance.now() - s).toFixed(2) + 'ms'
}, 0)
</script>
</body>
</html>
|
