mirror of
https://we.phorge.it/source/phorge.git
synced 2024-11-09 16:32:39 +01:00
Documentation: add article about Javelin DOM stuff
Summary: Finally we know something about: - how to get an element by id ($) - how to find some children by a parent (scry) - how to find an exact child by a parent (find) - how to find a parent by a child (findAbove) Closes T15870 Test Plan: You read this article and you find something interesting and probably also accurate. Reviewers: O1 Blessed Committers, aklapper Reviewed By: O1 Blessed Committers, aklapper Subscribers: aklapper, tobiaswiese, Matthew, Cigaryno Maniphest Tasks: T15870 Differential Revision: https://we.phorge.it/D25822
This commit is contained in:
parent
30c47690ff
commit
0fe0b9f681
3 changed files with 145 additions and 3 deletions
|
@ -84,7 +84,7 @@ which you access with @{function:JX.initBehavior}.
|
||||||
|
|
||||||
Another way to think about them is that you are defining methods which represent
|
Another way to think about them is that you are defining methods which represent
|
||||||
the entirety of the API exposed by the document. The recommended approach to
|
the entirety of the API exposed by the document. The recommended approach to
|
||||||
glue code is that the server interact with Javascript on the client //only// by
|
glue code is that the server interact with JavaScript on the client //only// by
|
||||||
invoking behaviors, so the set of available behaviors represent the complete set
|
invoking behaviors, so the set of available behaviors represent the complete set
|
||||||
of legal interactions available to the server.
|
of legal interactions available to the server.
|
||||||
|
|
||||||
|
@ -152,7 +152,7 @@ now you have a bunch of classes which only really have glue code in them.
|
||||||
|
|
||||||
Javelin behaviors provide a more structured solution to some of these problems:
|
Javelin behaviors provide a more structured solution to some of these problems:
|
||||||
|
|
||||||
- All your Javascript code is in Javascript files, not embedded in strings in
|
- All your JavaScript code is in JavaScript files, not embedded in strings in
|
||||||
in some host language on the server side.
|
in some host language on the server side.
|
||||||
- You can use static analysis and minification tools normally.
|
- You can use static analysis and minification tools normally.
|
||||||
- Provided you use a reasonable server-side library, you can't get escaping
|
- Provided you use a reasonable server-side library, you can't get escaping
|
||||||
|
|
|
@ -2,13 +2,16 @@
|
||||||
"name" : "javelin",
|
"name" : "javelin",
|
||||||
"title" : "Javelin Documentation",
|
"title" : "Javelin Documentation",
|
||||||
"short" : "Javelin Docs",
|
"short" : "Javelin Docs",
|
||||||
"preface" : "Documentation for developers using Javelin.",
|
"preface" : "Documentation for JavaScript developers using Javelin.",
|
||||||
"uri.source":
|
"uri.source":
|
||||||
"https://we.phorge.it/diffusion/P/browse/master/%f$%l",
|
"https://we.phorge.it/diffusion/P/browse/master/%f$%l",
|
||||||
"rules": {
|
"rules": {
|
||||||
"(\\.diviner$)": "DivinerArticleAtomizer"
|
"(\\.diviner$)": "DivinerArticleAtomizer"
|
||||||
},
|
},
|
||||||
"groups": {
|
"groups": {
|
||||||
|
"introduction": {
|
||||||
|
"name": "Introduction"
|
||||||
|
},
|
||||||
"concepts": {
|
"concepts": {
|
||||||
"name": "Concepts"
|
"name": "Concepts"
|
||||||
}
|
}
|
||||||
|
|
139
webroot/rsrc/externals/javelin/docs/javelin_intro.diviner
vendored
Normal file
139
webroot/rsrc/externals/javelin/docs/javelin_intro.diviner
vendored
Normal file
|
@ -0,0 +1,139 @@
|
||||||
|
@title Javelin Introduction
|
||||||
|
@group introduction
|
||||||
|
|
||||||
|
Explore the Javelin framework to make your frontend "go brrrrr".
|
||||||
|
|
||||||
|
= Preamble =
|
||||||
|
|
||||||
|
As you know, Phorge is the fork of Phabricator. But, you may not know
|
||||||
|
that Phabricator was designed with a particular Open Source JavaScript
|
||||||
|
library called **Javelin**.
|
||||||
|
|
||||||
|
So, why I should master Javelin?
|
||||||
|
|
||||||
|
The Javelin APIs are un-documented, un-intuitive, and esoteric,
|
||||||
|
and you may prefer X / Y / Z framework instead.
|
||||||
|
But hey: Javelin will //not// be abandoned anytime soon.
|
||||||
|
Give Javelin a try, so you can make Phorge even better.
|
||||||
|
|
||||||
|
Some advantages of Javelin:
|
||||||
|
|
||||||
|
- Javelin encourages strong separation between CSS selectors and
|
||||||
|
business logic selectors
|
||||||
|
- Javelin un-minified is more lightweight than jQuery minified
|
||||||
|
- it starts with "Jav" like "JavaScript" so it's easy
|
||||||
|
|
||||||
|
= Concepts: DOM Traversing with Sigils =
|
||||||
|
|
||||||
|
Traversing the DOM using Javelin is simple... as long as
|
||||||
|
you know what a "sigil" is. In fact, Javelin is designed to avoid
|
||||||
|
finding something by CSS classes. Instead, Javelin introduced
|
||||||
|
"sigils" - that is, exactly like a CSS class but vegan (?).
|
||||||
|
|
||||||
|
So, pretend you don't know what a CSS class is, and explore
|
||||||
|
this related reading about sigils, and how to store data in
|
||||||
|
elements marked with a sigil:
|
||||||
|
|
||||||
|
@{article:Concepts: Sigils and Metadata}.
|
||||||
|
|
||||||
|
The source code of the DOM utilities of Javelin is here:
|
||||||
|
|
||||||
|
https://we.phorge.it/source/phorge/browse/master/webroot/rsrc/externals/javelin/lib/DOM.js
|
||||||
|
|
||||||
|
== Find Element by ID with `$` ==
|
||||||
|
|
||||||
|
The `$` Javelin method finds exactly one HTML element by its id. Definition:
|
||||||
|
|
||||||
|
```javascript
|
||||||
|
function X.$(id: string): Element
|
||||||
|
```
|
||||||
|
|
||||||
|
Example usage:
|
||||||
|
|
||||||
|
```javascript
|
||||||
|
var elementById = JX.$('my-id');
|
||||||
|
```
|
||||||
|
|
||||||
|
As you can imagine, this method is just a shorter version for the native
|
||||||
|
[[ https://developer.mozilla.org/en-US/docs/Web/API/Document/getElementById | document.getElementById() ]].
|
||||||
|
|
||||||
|
Please remember to write `'id'` and not `'#id'`.
|
||||||
|
|
||||||
|
Comparison table from other frameworks:
|
||||||
|
|
||||||
|
| | From Code | To Javelin |
|
||||||
|
|-----------------|---------------|-----------------|
|
||||||
|
| **From jQuery** | `$('#my-id')` | `JX.$('my-id')` |
|
||||||
|
|
||||||
|
== Look Down for Multiple Elements with `scry` ==
|
||||||
|
|
||||||
|
The `scry` Javelin method looks down for multiple HTML elements by sigil.
|
||||||
|
Definition:
|
||||||
|
|
||||||
|
```javascript
|
||||||
|
function JX.DOM.scry(parent: Element, tagName: string, sigil: string): Element[]
|
||||||
|
```
|
||||||
|
|
||||||
|
Example usage:
|
||||||
|
|
||||||
|
```javascript
|
||||||
|
var elementsWithSigil = JX.DOM.scry(document.body, '*', 'my-sigil');
|
||||||
|
```
|
||||||
|
|
||||||
|
The method requires a starting element to descend from and
|
||||||
|
it returns an array of elements at any child depth, that have
|
||||||
|
the specified sigil __and__ the specified tag name. Few tips:
|
||||||
|
|
||||||
|
- if you don't want to specify a tag name, set "`*`" as tag name
|
||||||
|
- if you specify a tagname like "`a`", it may be faster
|
||||||
|
|
||||||
|
Comparison table from other frameworks:
|
||||||
|
|
||||||
|
| | From Code | To Javelin |
|
||||||
|
|-----------------|---------------------------------|------------------------------------------|
|
||||||
|
| **From jQuery** | `$(parent).find('.class-name')` | `JX.DOM.scry(parent, '*', 'sigil-name')` |
|
||||||
|
|
||||||
|
== Look Down for One Element with `find` ==
|
||||||
|
|
||||||
|
The `find` Javelin method looks down for exactly one element by sigil.
|
||||||
|
Definition:
|
||||||
|
|
||||||
|
```javascript
|
||||||
|
function JX.DOM.find(root: Element, tagName: string, sigil: string): Element
|
||||||
|
```
|
||||||
|
|
||||||
|
Example usage:
|
||||||
|
|
||||||
|
```javascript
|
||||||
|
var child = JX.DOM.find(document.body, '*', 'my-sigil');
|
||||||
|
```
|
||||||
|
|
||||||
|
As you can imagine, the method `find` is just a particular case of the method `scry`,
|
||||||
|
to be sure that you return exactly one element.
|
||||||
|
|
||||||
|
Comparison table from other frameworks:
|
||||||
|
|
||||||
|
| | From Code | To Javelin |
|
||||||
|
|-----------------|------------------------------------|------------------------------------------|
|
||||||
|
| **From jQuery** | `$(parent).find('.class-name')[0]` | `JX.DOM.find(parent, '*', 'sigil-name')` |
|
||||||
|
|
||||||
|
== Look Up for One Element with `findAbove` ==
|
||||||
|
|
||||||
|
The `findAbove` Javelin method looks up for exactly one HMTL element by sigil.
|
||||||
|
Definition:
|
||||||
|
|
||||||
|
```javascript
|
||||||
|
function JX.DOM.findAbove(anchor: Element, tagName: string, sigil: string): Element
|
||||||
|
```
|
||||||
|
|
||||||
|
Example usage:
|
||||||
|
|
||||||
|
```javascript
|
||||||
|
var parent = JX.DOM.findAbove(child, '*', 'my-sigil');
|
||||||
|
```
|
||||||
|
|
||||||
|
Comparison table from other frameworks:
|
||||||
|
|
||||||
|
| | From Code | To Javelin |
|
||||||
|
|-----------------|---------------------------------------|-----------------------------------------------|
|
||||||
|
| **From jQuery** | `$(anchor).closest('.class-name')[0]` | `JX.DOM.findAbove(anchor, '*', 'sigil-name')` |
|
Loading…
Reference in a new issue