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Deno 2.4 Brings Back deno bundle, Improves Dependency Management and Observability
Deno 2.4 brings back bundling, improves dependency updates and telemetry, and makes the runtime more practical for real-world JavaScript projects.
Chainable DOM Builder
$C(parentNode, replace, direct)
...
.end();
parentNode
is a DOM element to put the result into.
replace
is a boolean value indicates that parentNode
's content should be
replaced with newly built content (newly built content will be appended to the
current one when replace
is coerced to false
).
direct
indicates that everything should be rendered directly to parentNode
right away (skipping documentFragment creation).
Return value is the result's documentFragment in case parentNode
is not
passed. When parentNode
is passed, return value is undefined.
var tmp = 0;
$C(document.body)
.div({'class': 'ololo', 'style': 'background-color: red; height: 100px;'})
.act(function() {
// In all callbacks _this_ is pointing to the current element
// (it's newly created div here).
this.addEventListener('click', function() { alert(5555); });
})
.ul()
.repeat(2)
.li()
.text('aaa')
.end(4) // end(number) could be used to replace _number_ end() calls.
.repeat(3)
.span({'style': function() { return 'border: 1px solid green;'}})
.text(function(index) {
// _index_ is the repeat() index (from 0 to 2 here).
return index + ' ' + Math.random();
})
.end()
.end()
.repeat(function() { return ++tmp <= 5; })
.p()
.text(function(index) { return index + ' ' + tmp; })
.end()
.end()
.div()
.text('hello')
.text('<br>', true) // It is possible to add unescaped markup fragments.
.text('world')
.end()
.test(1 === 1) // .test() is used for conditional processing.
.elem('section') // Not all elements have shortcut functions like .div()
.text('ololo')
.end()
.end()
.test(function() { return false; })
.text('alala')
.end()
.each([9, 8, 7])
.p()
.text(function(item, index, arr) {
// _index_ is .each() array index, _item_ is the array element.
return index + ' ' + item;
})
.repeat(2)
.div()
.text(function(index) { return index; })
.end()
.end()
.div()
.text(function(item, index, arr) { return index + ' ' + item; })
.end(3)
.choose()
.when(false).text('1111').end()
.when(true).text('2222').end()
.otherwise().text('3333').end()
.end()
.end();
Will append the following to <body>
tag:
<div class="ololo" style="background-color: red; height: 100px;">
<ul>
<li>aaa</li>
<li>aaa</li>
</ul>
</div>
<span style="border: 1px solid green;">0 0.3901003133505583</span>
<span style="border: 1px solid green;">1 0.19187432969920337</span>
<span style="border: 1px solid green;">2 0.0640524192713201</span>
<p>0 1</p>
<p>1 2</p>
<p>2 3</p>
<p>3 4</p>
<p>4 5</p>
<div>
hello
<br>
world
</div>
<section>ololo</section>
<p>
0 9
<div>0</div>
<div>1</div>
<div>0 9</div>
</p>
<p>
1 8
<div>0</div>
<div>1</div>
<div>1 8</div>
</p>
<p>
2 7
<div>0</div>
<div>1</div>
<div>2 7</div>
</p>
2222
You can define custom actions for build process. For example, if you use jQuery, you can define an action for event handlers binding like below:
$C.define('on', function(item, index, arr, args) {
$.fn.on.apply($(this), args);
});
$C(document.body)
.div()
.on('click', function(e) { alert(123); })
.on('mousemove', function(e) { alert(345); })
.text('I am clickable and mousemoveable')
.end(2);
On every step of DOM building, we can memorize nodes and other data. Memorized
items are being put into $C.mem
dictionary. $C.mem
dictionary is initially
empty, but it is shared between different $C()
calls. You may want to reset
this dictionary manually like $C.mem = {}
.
$C(document.body)
.div()
.mem('helloDiv')
.text('hello')
.end()
.each([11, 22])
.span()
.mem(function(item, index, arr) {
return 'each' + index;
}, function(item, index, arr) {
return index + ' ' + item + ' ' + this.tagName.toLowerCase();
})
.end()
.end()
.end();
In this example $C.mem
will be:
{helloDiv: <div>hello</div>, each0: '0 11 span', each1: '1 22 span'}
Another example (with $C.mem
resetting):
$C.mem = {aa: 123, bb: 234};
$C(document.body)
.div()
.mem('aa')
.text('hello')
.end()
.end();
And $C.mem
will be:
{aa: <div>hello</div>, bb: 234}
FAQs
Chainable DOM Builder
The npm package concat.js receives a total of 1 weekly downloads. As such, concat.js popularity was classified as not popular.
We found that concat.js demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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