@html_first/atla-as_client

atlaAS_client

• an attempt to simplify HATEOAS rendering paradigm;
• it's designed to be used in the conjunction with our php sister library https://github.com/hakimjazuli/atlaAS in mind;
• however you can still uses this library with any kind of HATEOAS backend (with few tweaks);

Assumption

this library assumes you are familiar with

• js oop or classes syntax: for intellisense and extending our classes;
• js bundling: to bundle to client;
• JSDOC: to read our documented source files;

OR

• OPTIONS (if don't want to build it your self):

  • download a copy of ./prebundled.mjs from

    • nightly build
    • npm release(s)

  • add on window object window['a-on_loading'] = Object.<string,(modifier:_$)=>void>
  • add on window object window['a-raw'] = Object.<string,(text_response:string,modifier:_$)=>void>
  • where _$ is an object of _$ class
  • add css to modify #a-route_change_indicator and mark it as !important

<style>
	   #a-route_change_indicator{
	 position: 'new_value' !important,
	margin: 'new_value' !important,
	padding: 'new_value' !important,
	zIndex: 'new_value' !important,
	width: 'new_value' !important,
	top: 'new_value' !important,
	left: 'new_value' !important,
	visibility: 'new_value' !important,
	   }
</style>

why build it your self instead of using prebundled?

• you wouldn't

  • get type hinting;
  • able to redefine of our html attributes to your needs, expecially if a-${modifier} are already taken by other library you install;
  • able to manually modify our class behaviour to your needs;

How to install

1. install package from npm

npm i @html_first/atla-as_client

1. extending __AOnLoadings into AOnLoadings.mjs and __AOnRaw into AOnRaw.mjs like this

// AOnLoadings.mjs
// @ts-check

import { __AOnLoadings } from '@html_first/atla-as_client/';
/**
 * @typedef {import('@html_first/element_modifier')._$} _$
 */

export AOnLoadings = new __AOnLoadings({});

// AOnRaw.mjs
// @ts-check

import { __AOnRaw } from '@html_first/atla-as_client/';
/**
 * @typedef {import('@html_first/element_modifier')._$} _$
 */

export const AOnRaw = new __AOnRaw({});

1. set build entry point index.mjs

// @ts-check

import {
	__atlaAS_client,
	__AppSettings /** preferably to be extended first */,
	AjaxRenderer /** preferably to be extended first */,
	__ProgressBar /** preferably to be extended first */,
	_Triggers /** preferably to be extended first for custom a-trigger instructions */,
} from '@html_first/atla-as_client';
import { AOnLoadings } from './AOnLoadings.mjs' /** NEEDED to be extended first to use a-on_loading instructions */;
import { AOnRaw } from './AOnRaw.mjs' /** NEEDED to be extended first to use a-raw instructions */;

const a_client = new __atlaAS_client(
	__AppSettings,
	AjaxRenderer,
	__ProgressBar,
	_Triggers,
	AOnLoadings,
	AOnRaw
);
a_client.run();

1. bundling

   • you either use your own prefered bundler to bundle index.mjs to then load it into your html

<script type="module" src="/path/to/your/bundled.mjs" defer a-keep></script>

1. • or you can use our rollup dev-dependency bundler

Bundling using our rollup dev-dependency bundler

1. setup /rollup.config.mjs

// @ts-check

import { _RollupSettings, _RollupTarget } from '@html_first/atla-as_builder';

const targets = [new _RollupTarget('prebundled', './builder/index.mjs', `./`)];

export default new _RollupSettings(targets).config;

1. then on terminal, run

rollup -c

1. or if you want to watch for changes

rollup -c -w

1. you might want to add that to your package.json .scripts, for simplicity

Uses in html

best practice (with adhering no-script fallback):

the best practice is still using normal html request tag (anchor: a or form: form) so in the event of javascript is disabled by the client, site is still can function, without client side routing; while ofcourse you have to handle things on your backend more carefully;

• anchor tag attributes:

  • href

    • url end point;

  • a-

    • absent: anchor tag will act as normal link;
    • present: turn anchor tag into partial renderer;

• form tag attributes:

  • action

    • url end point;

  • method

    • http request method;

controller & view

• controllers: are element that are used to trigger ajax;

  • it have list of views that it will send instruction to request an ajax to server;

• views: are element that used (its outerHTML, or innerText in case of a-failed) to display the ajax response;

  • it have information of

    • what controller event it should listen to;
    • and which end point it should request to;

custom html attributes:

• [a-controller]

  • only for controllers;
  • value:

    • viewValue1;viewValue2;...viewValueN;
    • self;: automatically generated on a and form if element has no a-controller attribute ;

• [a-trigger]

  • only for controllers;
  • add controller to queue;
  • value:

    • element.addEventListener type;
    • click: automatically generated on a if element has no a-trigger attribute;
    • submit: automatically generated on form if element has no a-trigger attribute;
    • lazy: when controller on view port request event once;
    • tick: tick;interval_ms;run_n_times, n times can also be negative number to make it request for indefinite times (usefull for long polling);
    • lazy_tick: lazy_tick;interval_ms;run_n_times, the same as tick, however it only starts when controller is in view port;

• [a-debounce]: ms

  • only for controllers;
  • debounce event by a-debounce value ms

• [a-]

  • for anchor tags only;
  • partial renderer to overwrite route change behaviour into ajax actions to documents partial instead of full page render;

• [a-path]

  • only for views;
  • url end point;
  • automatically generated on a (from href) and form (from action);
  • use curly braces to wrap named value matched with [a-val] as lookup value;
  • use square braces to wrap named query params matched with curent uri as lookup value;

• [a-view]

  • only for views;
  • value:

    • {viewValue1};{viewValue2};...{viewValueN} (notice that it must have curly braces closure);

• [a-method]

  • only for views;
  • http request method;

• [a-token_name]

  • only for non get http method views;
  • for csrf_${a-token_name_value};
  • should be generated from backend;

• [a-token_value]

  • only for non get http method views;
  • for csrf_${a-token_value_value};
  • should be generated from backend;

• [a-timeout]: ms

  • only for views;
  • if request doesn't returns on the timeout render a-failed_text;
  • [a-failed_text]:

    • only for views;
    • render its string to innerText;

  • [a-failed]:

    • automatically assigned when a-timeout is triggered;

• [a-on_loading]

  • only for views;
  • target __AOnLoadings_method to animate transition and/or running async script during [a-loading]

    • if you only wanted to animate your element, then no need to extends our \_\_AOnLoadings, you can just make uses [a-loading] on your css;

• [a-keep]

  • unique string to keep element upon route change;

• [a-val]

  • only for HTMLInputElement or HTMLSelectElement;
  • will modify [a-path] value inside curly braces matched with [a-val] element value;

/* most browser already supports nested css selector natively */

[a-loading] {
	&.your_selector,
	& .your_selector {
		/* css code */
	}

	&[your_other_selector],
	& [your_other_selector] {
		/* css code */
	}
}

• [a-lazy]

  • automatically assigned using [a-trigger='lazy'];

• [a-loading]

  • automatically assigned during ajax request;

• [a-keep]

  • on script tag: to identify script that are not run more than once (use with conjunction with src);
  • on other tag in the body tag: depends on the value of a-keep on incoming route change request, it will place the old element to the new place on the html document;

On client script behaviours

• only script tag with no src and a-keep will be re-run;

  • unless [method='module'], then as per html standard specification it will be only run once;

• some of script tag may cause errors (including but not limited to, pre compiled bootsrap.js) when re-run, so you need to make sure to put a-keep on that script;

  • if you put it in the head tag, it also need to have exact same outerHTML and (src, with value, and a-keep attribute) ;

• this library have no history library as dependency:

  • on popstate event, it will request fresh page from backend;
  • it's by design, to check whether there's change in the data;
  • for in HATEOAS backend should be the only source of truth;

• ajax request will allways replace outerHTML (innerHTML in case of [a-failed]) of the views by design;

  • you don't select the element by using css selector, you select them by adding view to them instead;
  • then that views will make request to its own a-path attribute's value, with its own a-method method;

• views with the same viewName fragment will request at the same time using Promise.all api;
• [a-trigger='lazy'] which intersect on viewport at the same time, will also be handled using Promise.all api;
• controller can also act as view, by setting its a-controller to "self;";

  • on a and form tag if you don't specify a-controller it will be assigned as "self;";

• request header on each request is set with atlaAS-client-from the value is curent window.location.href;

  • on php case it can be read using $_SERVERS['HTTP_ATLAAS_CLIENT_FROM'];

• script tag that are rendered using pratial a- will not be run;

  • all of script should be placed either inside head tag with defer|async attribute or inside body before its closing tag </body>

Library Naming Convenience

• classes that are PREFIXED with "__" are globals, can be accessed with its "__" static method, no need to be instantiated after the __atlaAS_client(...args).run() script;
• classes that are PREFIXED with "_" are meant to be used in your app;
• classes that are NOT PREFIXED with any "_" are meant for library internals;

Credit(s)

this library is inspired by:

• htmx.js: https://htmx.org/

  • more precisely it's HATEOAS paradigm in general;