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snabbdom

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snabbdom - npm Package Compare versions

Comparing version 0.3.1 to 0.3.2

6

package.json
{
"name": "snabbdom",
"version": "0.3.1",
"version": "0.3.2",
"description": "A virtual DOM library with focus on simplicity, modularity, powerful features and performance.",

@@ -13,4 +13,6 @@ "main": "snabbdom.js",

"benchmark": "^1.0.0",
"browserify": "^13.0.0",
"fake-raf": "0.0.1",
"knuth-shuffle": "^1.0.1"
"knuth-shuffle": "^1.0.1",
"testem": "^1.0.2"
},

@@ -17,0 +19,0 @@ "scripts": {

119

README.md

@@ -17,2 +17,3 @@ # Snabbdom

* [Helpers](#helpers)
* [Structuring applications](#structuring-applications)

@@ -30,3 +31,3 @@ ## Why

is only ≈ 200 SLOC. It offers a modular architecture with rich functionality
for extensions through custom modules. To keep the core simple all non-essential
for extensions through custom modules. To keep the core simple, all non-essential
functionality is delegated to modules.

@@ -42,10 +43,10 @@

* Core features
* About 200 SLOC – you could easily read through the entire core and fully.
* About 200 SLOC – you could easily read through the entire core and fully
understand how it works.
* Extendable through modules.
* A rich set of hooks available both per vnode and globally for modules.
* A rich set of hooks available both per vnode and globally for modules,
so they can hook into any part of the diff and patch process.
* Splendid performance. Snabbdom is among the fastest virtual DOM libraries.
* Splendid performance. Snabbdom is among the fastest virtual DOM libraries
in the [Virtual DOM Benchmark](http://vdom-benchmark.github.io/vdom-benchmark/).
* Patch function with a function signature equivelant to a reduce/scan.
* Patch function with a function signature equivelant to a reduce/scan
function. Allows for easier integration with a FRP library.

@@ -102,3 +103,3 @@ * Features in modules

The core exposes only one single function `snabbdom.init`. `init` takes a list of
The core exposes only one single function `snabbdom.init`. This `init` takes a list of
modules and returns a `patch` function that uses the specified set of modules.

@@ -119,5 +120,5 @@

If a DOM element with a parent is passed `newVnode` will be turned into a DOM
node and the passed element will be replaced by the created DOM node. If an old
vnode is passed Snabbdom will effeciently modify to match the description in
If a DOM element with a parent is passed, `newVnode` will be turned into a DOM
node, and the passed element will be replaced by the created DOM node. If an old
vnode is passed, Snabbdom will effeciently modify it to match the description in
the new vnode.

@@ -152,3 +153,3 @@

offers a rich selection of hooks. Hooks are used both by modules to
extend Snabbdom and in normal code for executing arbitrary code at
extend Snabbdom, and in normal code for executing arbitrary code at
desired points in the life of a virtual node.

@@ -161,2 +162,3 @@

| `pre` | the patch process begins | none |
| `init` | a vnode has been added | vnode |
| `create` | a DOM element has been created based on a VNode | `emptyVNode, vnode` |

@@ -167,3 +169,3 @@ | `insert` | an element has been inserted into the DOM | `vnode` |

| `postpatch` | an element has been patched | `oldVnode, vnode` |
| `destroy` | an element is directly or indirectly begin removed | `vnode` |
| `destroy` | an element is directly or indirectly being removed | `vnode` |
| `remove` | an element is directly being removed from the DOM | `vnode, removeCallback` |

@@ -176,3 +178,3 @@ | `post` | the patch process is done | none |

The following hooks are available in the `hook` property of individual
elements: `create`, `insert`, `prepatch`, `update`, `postpatch`,
elements: `init`, `create`, `insert`, `prepatch`, `update`, `postpatch`,
`destroy`, `remove`.

@@ -194,2 +196,11 @@

#### The `init` hook
This hook is invoked during the patch process when a new virtual node has been
found. The hook is called before Snabbdom has processed the node in any way.
I.e. before at has created a DOM node based on the vnode.
If the hook handler sets the `vnode` property on the vnode, then Snabbdom will
use the vnode at `vnode` instead of the actual vnode.
#### The `insert` hook

@@ -206,9 +217,9 @@

Allows you to hook into the removal of an element. The hook is called once a
vnode is to be removed from the DOM. The handling function recieves both the
vnode is to be removed from the DOM. The handling function receives both the
vnode and a callback. You can control and delay the removal with the callback.
It should be invoked once the hook is done doing its business and the element
It should be invoked once the hook is done doing its business, and the element
will only be removed once all `remove` hooks have invoked their callback.
The hook is only triggered when and element is to be removed from its parent –
not if it is the child of an element that is removed. For that see the destroy
The hook is only triggered when an element is to be removed from its parent –
not if it is the child of an element that is removed. For that, see the destroy
hook.

@@ -218,7 +229,5 @@

This hook is invoked whenever an element removed from the DOM or the child
to an element that is being removed.
This hook is invoked on a virtual node when its DOM element is removed from the DOM or if its parent is being removed from the DOM.
To see the difference between this hook and the `remove` hook consider an
To see the difference between this hook and the `remove` hook, consider an
example.

@@ -239,3 +248,3 @@

being removed and use the `destroy` hook to additionally animate the
disappearance of the removed elements children.
disappearance of the removed element's children.

@@ -258,3 +267,3 @@ ### Creating modules

With this mechanism you can easily augument the behaviour of
Snabbdom. For demonstration take a look at the implementations of the
Snabbdom. For demonstration, take a look at the implementations of the
default modules.

@@ -287,3 +296,3 @@

Same as props but set attributes instead of properties on DOM elements
Same as props, but set attributes instead of properties on DOM elements.

@@ -294,12 +303,12 @@ ```javascript

Attributes are added and updated using `setAttribute`. In case of an attribute
that has been previously added/set is no longer present in the `attrs` object,
it is removed from the DOM element's attribute list using `removeAttribute`.
Attributes are added and updated using `setAttribute`. In case of an attribute
that has been previously added/set and is no longer present in the `attrs` object,
it is removed from the DOM element's attribute list using `removeAttribute`.
In the case of boolean attributes (.e.g. `disabled`, `hidden`, `selected` ...).
The meaning doesn't depend on the attribute value (`true` or `false`) but depends
instead on the presence/absence of the attribute itself in the DOM element. Those
attributes are handled differently by the module : if a boolean attribute is set
to a [falsy value](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean) (`0`, `-0`, `null`, `false`,`NaN`, `undefined`, or the empty
string (`""`)) then the attribute will be removed from the attribute list of the
In the case of boolean attributes (e.g. `disabled`, `hidden`, `selected` ...),
the meaning doesn't depend on the attribute value (`true` or `false`) but depends
instead on the presence/absence of the attribute itself in the DOM element. Those
attributes are handled differently by the module: if a boolean attribute is set
to a [falsy value](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean) (`0`, `-0`, `null`, `false`,`NaN`, `undefined`, or the empty
string (`""`)), then the attribute will be removed from the attribute list of the
DOM element.

@@ -319,3 +328,3 @@

Note that the style module does not remove style attributes if they are removed
as properties from the style object. To remove a style you should instead set
as properties from the style object. To remove a style, you should instead set
it to the empty string.

@@ -331,3 +340,3 @@

You can specify properties as being delayed. Whenever these properties change
You can specify properties as being delayed. Whenever these properties change,
the change is not applied until after the next frame.

@@ -346,4 +355,4 @@

Styles set in the `remove` property will take effect once the element is about
to be moved from the DOM. The applied styles should be animated with CSS
transitions. Only once all the styles is done animating will the element be
to be removed from the DOM. The applied styles should be animated with CSS
transitions. Only once all the styles is done animating, will the element be
removed from the DOM.

@@ -384,3 +393,3 @@

Very often however you're not really interested in the event object itself.
Very often, however, you're not really interested in the event object itself.
Often you have some data associated with the element that triggers an event

@@ -391,3 +400,3 @@ and you want that data passed along instead.

by 1, one to increment the counter by 2 and one to increment the counter by 3.
You're don't really care exactly which button was pressed. Instead you're
You don't really care exactly which button was pressed. Instead you're
interested in what number was associated with the clicked button. The event listeners

@@ -423,7 +432,7 @@ module allows one to express that by supplying an array at the named event property.

h('div', [
h('input', {props: {type: 'radio', name: 'test', value: '0'},
h('input', {props: {type: 'radio', name: 'test', value: '0'},
on: sharedHandler}),
h('input', {props: {type: 'radio', name: 'test', value: '1'},
h('input', {props: {type: 'radio', name: 'test', value: '1'},
on: sharedHandler}),
h('input', {props: {type: 'radio', name: 'test', value: '2'},
h('input', {props: {type: 'radio', name: 'test', value: '2'},
on: sharedHandler})

@@ -440,7 +449,7 @@ ]);

h('div', [
h('input', {props: {type: 'radio', name: 'test', value: '0'},
h('input', {props: {type: 'radio', name: 'test', value: '0'},
on: {change: sharedHandler}}),
h('input', {props: {type: 'radio', name: 'test', value: '1'},
h('input', {props: {type: 'radio', name: 'test', value: '1'},
on: {change: sharedHandler}}),
h('input', {props: {type: 'radio', name: 'test', value: '2'},
h('input', {props: {type: 'radio', name: 'test', value: '2'},
on: {change: sharedHandler}})

@@ -471,3 +480,3 @@ ]);

The `thunk` function takes a name for identifying a thunk, a function that
returns a vnode and a variable amount of state parameters. If invoked the
returns a vnode and a variable amount of state parameters. If invoked, the
render function will recieve the state parameters.

@@ -488,3 +497,3 @@

The view depends only on `n`. This means that if `n` is unchanged then
The view depends only on `n`. This means that if `n` is unchanged, then
creating the virtual DOM node and patching it against the old vnode is

@@ -501,3 +510,3 @@ wasteful. To avoid the overhead we can use the `thunk` helper function.

a dummy vnode in the virtual tree. When Snabbdom patches this dummy vnode
against a previous vnode it will compare the value of `n`. If `n` is unchanged
against a previous vnode, it will compare the value of `n`. If `n` is unchanged
it will simply reuse the old vnode. This avoids recreating the number view and

@@ -510,1 +519,17 @@ the diff process altogether.

## Structuring applications
Snabbdom is a low-level virtual DOM library. It is unopinionated with
regards to how you should structure your application.
Here are some approaches to building applications with Snabbdom.
* [functional-frontend-architecture](https://github.com/paldepind/functional-frontend-architecture) –
a repository containing several example applications that
demonstrates an architecture that uses Snabbdom.
* [Motorcycle.js](https://github.com/motorcyclejs/core) –
is a variant of the functional and reactive Javascript framework
[Cycle.js](http://cycle.js.org/) that uses Snabbdom.
Be sure to share it if you're building an application in another way
using Snabbdom.

2

snabbdom.js

@@ -214,3 +214,3 @@ // jshint newcap: false

for (i = 0; i < cbs.pre.length; ++i) cbs.pre[i]();
if (oldVnode instanceof Element) {
if (oldVnode.nodeType === Element.ELEMENT_NODE) {
if (oldVnode.parentElement !== null) {

@@ -217,0 +217,0 @@ createElm(vnode, insertedVnodeQueue);

16

test/core.js

@@ -110,2 +110,18 @@ var assert = require('assert');

});
it('can create an element created inside an iframe', function(done) {
// Only run if srcdoc is supported.
var frame = document.createElement('iframe');
if (typeof frame.srcdoc !== 'undefined') {
frame.srcdoc = "<div>Thing 1</div>";
frame.onload = function() {
patch(frame.contentDocument.body.querySelector('div'), h('div', 'Thing 2'));
assert.equal(frame.contentDocument.body.querySelector('div').textContent, 'Thing 2');
frame.remove();
done();
};
document.body.appendChild(frame);
} else {
done();
}
});
});

@@ -112,0 +128,0 @@ describe('pathing an element', function() {

examples/svg/script.js~
perf/build.js
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