@htmlguyllc/jpack

Build Status

jPack

jPack is a vanilla javascript library of components, classes, plugin wrappers, and utilities designed to make building custom websites and web applications simpler.

But why?

Many plugins and libraries are too generic, verbose, bulky, lacking, or have a lot of dependencies. Much of what is included here is stuff that I've written several times, in several different ways, using jQuery in the past (or wrapping other jQuery plugins). The goal of this library is to allow me (and you, now that it's open source) to integrate slim, mostly dependency-free, components as-needed with more specific use-cases than what is currently offered elsewhere.

...where else can you get a component to grab a form from another page and stick it on the current one with XHR and XHR submission in 4 lines of custom JS?

What's Included

Component	Demo	Data Type	Singleton?	What it does
navigation		object	yes	Grabs HTML from a URL and replaces content on the current page. Handles browser history, meta title swaps, and offers several callbacks
XHRForm		class	no	Adds an on-submit listener and sends the form values using XHR with callbacks for success/failure
FormFromURL (extends XHRForm)		class	no	Grabs a form from a URL and places it on the current page (examples/FormModalFromURL shows how to put the form in a modal) and then uses an XHR request to submit the form
request	demo	object	yes	Provides a wrapper for window.location and easy querystring interaction
Site	demo	class	no	A generic website class with properties for id, name, and config - useful for multi-tenant applications where you need to know which site is being viewed
User	demo	class	no	A generic user class with properties for id, name, email, phone, etc - also allows for front-end permission checks
strings	demo	object	yes	Contains methods for semi-common string manipulation like creating a getter from a string ('hi' = 'getHi')
type_checks	demo	object	yes	Validate the value of a variable with higher specificity than built-in functions. For instance, you can validate an object contains specific keys and throw errors if not, or if it contains keys that you didn't define
dom	demo	object	yes	Has methods for converting just about anything into a native DOM Element or array of them (you can provide a string selector, jQuery object, native DOM object, etc). Also has some shortcuts for common DOM checks/manipulation (like removing an element, verifying an element exists in the DOM, or replacing an element with HTML)
events	demo	object	yes	Includes methods for attaching event handlers including shorthand methods which create handlers that prevent the browser's default action (onclick, onsubmit)
ToggleOnMobile	demo	class	no	Toggle an element's visibility when you click a button. By default, the element is visible, but if the button is visible, the element will be hidden until the button is clicked. If the element is visible and the user clicks outside of it, the element is hidden. If the window is resized, the element will be shown or hidden based on visibility of the button.

Installation

Standard Global

Download the latest release, unzip and move it into your website's public folder, then include it in your HTML.

Use either jpack.min.js or jpack.bundled.min.js, BUT NOT BOTH. The bundled file includes the dependencies and you don't need them if you already have them in your project.

<script href="/@htmlguyllc/jpack/dist/jpack.bundled.min.js">
<!-- <script href="/@htmlguyllc/jpack/dist/jpack.min.js"> -->

<script>
//wait for the page to finish loading so we know jpack is ready
window.addEventListener('load', function() {
    
    //now you can take advantage of the jpack library
    jpack.strings.ucfirst('bob'); //Bob
    
    //if you want to change the namespace
    jpack.setGlobal("$");
    
    $.strings.ucfirst('bob');
    
    //if you want to make all global without a namespace - do so at your own risk! Things may conflict!
    jpack.setGlobal();
    
    strings.ucfirst('bob');
};
</script>

With NPM or Yarn:

npm i @htmlguyllc/jpack;
//or
yarn add @htmlguyllc/jpack;

ES6 (Babel)

//a single component from it's own file
import {strings} from '@htmlguyllc/jpack/es/strings';
strings.ucfirst('bob');

//or multiple components from jpack
import {strings, dom} from '@htmlguyllc/jpack';
strings.ucfirst('bob');
dom.exists('a.my-link');

//or a namespaced object containing all components
import * as j from '@htmlguyllc/jpack';
j.strings.ucfirst('bob');

CommonJS (Browserify)

var jpack = require('@htmlguyllc/jpack');

//now use it
jpack.strings.ucfirst('bob');

Dependencies

Name	Required by	Link
url-search-params-polyfill	request	https://www.npmjs.com/package/url-search-params-polyfill
axios	navigation	https://www.npmjs.com/package/axios
formdata-polyfill	XHRForm (and anything that extends it)	https://www.npmjs.com/package/formdata-polyfill

Documentation

---

Navigation

[back to top](#whatsincluded)

Grabs HTML from a URL and replaces content on the current page. Handles browser history, meta and page title swaps, and offers several callbacks

Method/Property	Params (name:type)	Return	Notes
storeHistory	n/a		bool property that enables tracking history each time .load is called (right after onload callbacks are executed the history is updated, so if you grab the last history record from within your onload function, you will receive the one prior to that) - defaults to true
getHistory		array	returns an array of objects containing "url" and "route" starting with the first load and ending with the latest
getLastHistoryRecord		object	returns an object containing "url" and "route" for the last page grabbed by .load()
setData	data:mixed	self	set data you want provided in the onload method for the next page
setDataItem	key:string, val:mixed	self	set a single item in your data object
getDataItem	key:string	self	returns a single item from your data object, or null if the key doesn't exist
clearData		self	must be called manually or the data will persist infinitely. you can set an onload callback to clear this every time
getData		mixed	returns the data you set
setIncomingElement	el:string	self	a selector string for the element being retrieved from another page which contains the HTML you want put on the current page
getIncomingElement		string
setReplaceElement	el:string	self	a selector string for the element on the current page you want the new HTML to replace
getReplaceElement		string
load	url:string, callback:function/null, incoming_el:string/null, replace_el:string/null, push_state:bool	void	pulls content from the provided URL and puts it on the current page - also swaps out the page title, metas, and much more
loaderEnabled	n/a	bool	property to toggle the slow request loader on/off
setLoaderDelay	delay:int	self	set how long a request should take in ms before the loader displays
getLoaderDelay		self
showLoader		self	shows the loader after the delay
hideLoader		self	clears the loader timeout and hides it
getRouteFromMeta	html:string	string	retrieves the value of a meta tag named "current_route" (or passed in JSON with a key of the same name) to be passed in the onload event to help trigger page-specific JS
reload	callback:function	self	reloads the current page using .load()
fullReload		void	performs a full browser refresh of the current page
redirect	url:string	void	redirects the user to a new page (no XHR request)
onload	callback:function	self	add an onload callback (runs 100ms after unload)
removeOnload	callback:function	self	removes an onload callback
onUnload	callback:function	self	add an unload callback
removeOnunload	callback:function	self	removes an unload callback
onFail	callback:function	self	add a callback when the load() request fails - receives 2 params (error:string, axios_error:object)
removeOnFail	callback:function	self	removes a failure callback
initHistoryHandlers		self	sets event listeners to handle back/forward navigation in the user's browser

To use:

import {navigation} from '@htmlguyllc/jpack/es/navigation'; 

//handles browser back/forward buttons
navigation.initHistoryHandlers();

//a selector that contains the HTML you'd like to pull from the response
//the default is "body"
//if the response is a JSON object with an "html" key, it'll use the value of that
navigation.setIncomingElement('#main-content'); 

//a selector that will be replaced with the incoming HTML
//WARNING: If IncomingElement does not match, this will be overwritten by the IncomingElement after it's replaced 
// (since it presumably no longer exists at that point)
//by default it'll replace anything in "body"
navigation.setReplaceElement('#main-content');

//enables a loader to show if a request takes more than 300ms
//WARNING: No styling is provided at this time 
// It uses Bootstrap 4's progress-bar classes
navigation.loaderEnabled = true;
navigation.setLoaderDelay(300);

/**
* When loading a page using .load is complete, this callback will be executed
* 
* el is the new element on the page
* el_selector is the selector string used to grab that element from the URL
* replaced_selector is the selector string for the element that was replaced (99.99% of the time no longer exists, but you may need it for something)
* route is a value that can be set either as a meta tag in the HTML of the URL the content was pulled from or as a JSON value with the key "current_route"
* data is the data you set to pass to the next page (this is the next page receiving it)
*/
navigation.onload(function(el, el_selector, replaced_selector, route, data){
   
   //if gtag is set (google analytics), push a page view
   if( typeof gtag !== 'undefined' ) {
       gtag('config', 'GA_MEASUREMENT_ID', {
           page_path: request.getURIWithQueryString()
       });
   }
   
   //you can grab the last page that was loaded (prior to this one) like this:
   var last_history = navigation.getLastHistoryRecord();
   if( last_history ){
       const last_url = last_history.url;
       const last_route = last_history.route;
   }
   
   //scroll to the top of the page
   window.scrollTo(0, 0);
   
   //.. do something...like init tooltip plugins
});

/**
* Just before content is swapped for a new page, the unload callbacks are executed
* 
* el is the current element on the page that will be replaced
* el_selector is the selector used to grab that element
* route is the current route
* data is any data you set to pass on (for the new request, not when this page was originally loaded)
*/
navigation.onUnload(function(el, el_selector, route, data){
   //.. do something...like remove generic event handlers or destroy plugins 
});

/**
* When an exception occurs during the request or while processing the response, this function will be executed
* 
* error is the string message
* url is the requested URL that failed
* data is the data you provided to be passed onto that page
* axios_error is an error object set by axios that will be availble if that is the point of origination
*/
navigation.onFail(function(error, url, data, axios_error){
    //.. do something...like show an error popup for the user or log the issue
});

//now use the plugin to load pages
//if you're lazy, the fastest way to integrate is to just add data-href to all internal links 
//and then attach a handler like this:
import {events} from '@htmlguyllc/jpack/es/events';
events.onClick('[data-href]', function(){
   navigation.load(this.href); 
});

//set something that will be received onload of the next page
navigation.setData({
    product_id:1
});
//or you can set items individually
navigation.setDataItem('product_id', 1);

/**
* same parameters apply when your onload callback is provided for one-time use
*  when calling .load (see details above)
*/
navigation.load('/my-page', function(el, el_selector, replaced_selector, route, data){
    //my page is now loaded
    
    //get the product_id that was set
    const product_id = data.product_id;
    
    //now clear it so it's gone for the next page load
    navigation.clearData();
});

//in some cases, you'll want to grab a different element from the URL
//this example grabs .popup-content from /my-popup and replaces .current-popup
navigation.load('/my-popup', function(el, el_selector, replaced_selector, route, data){
   //now the new element is on the page
}, '.popup-content', '.current-popup');

---

XHRForm

[back to top](#whatsincluded)

Adds an on-submit listener and sends the form values using XHR with callbacks for success/failure. Automatically prevents the user from submitting the form several times at once. It must finish processing before it can be submitted again.

Method/Property	Params (name:type)	Return	Notes
constructor	form:Element,options:object	self
setXHRSubmit	enabled:bool	self	enable/disable the XHR submission of the form
setSubmitMethod	method:string	self	override the form and provide a method (GET, POST, PATCH)
getSubmitMethod		method:string
setSubmitURL	url:mixed	self	pass null to use the form's action, function to dynamically generate the URL (receives the form as a param), or string
getSubmitURL		url:string	returns whatever was set in the constructor or using setSubmitURL, not the final URL
getFinalSubmitURL	form:Element	url:string	returns the URL the form will be submitted to after running the function (if it is one) and using all fallbacks
attachSubmitHandler	form:mixed	self	attaches the event listener to on submit of the passed form
onSuccess	callback:function	self	adds an onSuccess callback (you can add as many as you'd like)
clearOnSuccessCallbacks		self
triggerOnSuccess	response:mixed, form:Element	self	runs all onSuccess callbacks and passes the server's response and the form element
onError	callback:function	self	adds an onError callback (you can add as many as you'd like)
clearOnErrorCallbacks		self
triggerOnError	error:string, response:mixed, form:Element	self	triggers all onError callbacks and passes the error string, server response, and form Element
submitForm	form:Element	self	gets URL and method, checks form validity using .validate(), gets values, submits, and kicks off callbacks
getFormValues	form:Element	self	returns data from the form to be submitted - override this if you want to manipulate it first
setValidateCallback	callback:function	is_valid:bool	pass a function to validate the form and return true if it's valid, false if it's not. False prevents form submission so you must display errors for the user within here. The default callback uses Bootstrap 4's "was-validated" class to show errors and HTML5's :invalid attribute to validate
validate	form:Element	bool	passes the form to the validate callback and returns the response

To use:

import {XHRForm} from '@htmlguyllc/jpack/es/forms'; 

//shown with defaults
var remote_form = new XHRForm('form[name="my_form"]', {
        xhrSubmit: true, //wouldn't make a whole lotta sent to use this if this were false lol, but it's here for extending classes and incase you want to toggle it for whatever reason
        submitURL:null, //when null, the form's action will be used (if explicitly defined), otherwise it falls back to the URL the form was retrieved from
        submitMethod:null, //when null, the form's method will be used (if explicitly defined), otherwise it falls back to POST
        onError: function(error, response, form){ alert(error); }, //although you can add more, you can only pass 1 to start with in the constructor
        onSuccess: function(response, form){ //although you can add more, you can only pass 1 to start with in the constructor 
            if(typeof response.success === "string"){ alert(response.success); }
            else{ alert("Your submission has been received"); }
        },
        //validate the form, display any errors and return false to block submission
        validateForm: function(form){
            //add .was-validated for bootstrap to show errors
            form.classList.add('was-validated');
    
            //if there are any :invalid elements, the form is not valid
            const is_valid = !form.querySelector(':invalid');
    
            //if it's valid, clear the validation indicators
            if( is_valid ) form.classList.remove('was-validated');
    
            return is_valid;
        }
});

//attach the submission handler
remote_form.attachSubmitHandler();

---

FormFromURL

FormFromURL extends [XHRForm](#xhrform)

[back to top](#whatsincluded)

Grabs a form from a URL and places it on the current page (examples/FormModalFromURL shows how to put the form in a modal) and then uses an XHR request to submit the form

Method/Property	Params (name:type)	Return	Notes
constructor	url:string, options:object	self
setURL	url:string	self	set the URL to pull the form from
getURL		url:string
setIncomingElementSelector	selector:string	self	set a selector for the form element or it's parent that is returned by the URL
getIncomingElementSelector		selector:string
setInsertIntoElement	element:mixed	self	set the element that the form should be inserted into
getInsertIntoElement		element:mixed
getForm		void	pulls the form from the URL and runs the insertForm method
insertForm	parsed_content:object, response:mixed, form:Element/null	el:Element	inserts the form into the parent element, attaches the submit handler, triggers onload, and returns the parent element
onload	callback:function	self	adds a callback function to be run when the form is loaded on the page
clearOnloadCallbacks		self	removes all onload callbacks
triggerOnload	form:Element	self	runs all onload callbacks and passes the form to them

There are several methods and properties inherited from XHRForm that are not listed here. See XHRForm above for those details

To use:

import {FormFromURL} from '@htmlguyllc/jpack/es/forms'; 

//shown with defaults
var remote_form = new FormFromURL('/my-form', {
        incomingElementSelector: null, //when null, it assumes the entire response is the form's HTML
        insertIntoElement: null, //error on null, must provide this
        onload: function(form){ return this; }, //although you can add more, you can only pass 1 to start with in the constructor
        xhrSubmit: true, 
        submitURL:null, //when null, the form's action will be used (if explicitly defined), otherwise it falls back to the URL the form was retrieved from
        submitMethod:null, //when null, the form's method will be used (if explicitly defined), otherwise it falls back to POST        
        onError: function(error, response, form){ alert(error); }, //although you can add more, you can only pass 1 to start with in the constructor
        onSuccess: function(response, form){ //although you can add more, you can only pass 1 to start with in the constructor 
            if(typeof response.success === "string"){ alert(response.success); }
            else{ alert("Your submission has been received"); }
        }, 
        //validate the form, display any errors and return false to block submission
        validateForm: function(form){
            //add .was-validated for bootstrap to show errors
            form.classList.add('was-validated');
    
            //if there are any :invalid elements, the form is not valid
            const is_valid = !form.querySelector(':invalid');
    
            //if it's valid, clear the validation indicators
            if( is_valid ) form.classList.remove('was-validated');
    
            return is_valid;
        }
});

//grab the form and insert in into the "insertIntoElement"
remote_form.getForm();

How to get and submit a form in 4 lines of javascript:

- Success/failure messages will be shown in an alert - HTML5/browser validation is done on the required field prior to submit

Your javascript

import {FormFromURL} from '@htmlguyllc/jpack/es/forms'; 
new FormFromURL('/email-form', {
    insertIntoElement: 'body.form-container',
}).getForm();

Your HTML

<div class="form-container"></div>

Server response when retrieving /email-form (or, just the HTML without the JSON wrapper)

{
 "html": "<form><input name='email' required='required'><input type='submit' value='Submit'></form>"
}

Server response when submitting to /email-form (success)

{ "success": "Thank you for submitting, your email has been provided to spammers everywhere" }

Server response when submitting to /email-form (error)

{ "error": "Your email is required/Your email is invalid" }

Extending:

FormFromURL extends XHRForm and either can be extended as you need.

See examples/FormModalFromURL for an example

---

Request

[demo](https://jsfiddle.net/HTMLGuyLLC/73b2kotL/) | [back to top](#whatsincluded)

Provides a wrapper for window.location and easy querystring interaction

Method/Property	Params (name:type)	Return	Notes
query	n/a	URLSearchParams	see https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams#Methods
isHttps		bool
getDomain		string
getDomainWithProtocol		string
getURI		string	also known as the path - does not include querystring
getURIWithQueryString		string	full URL after the domain
getFullURL		string
appendSlash	string:string	string	adds a slash (if there isn't already one) to the end of a string.

To use:

import {request} from '@htmlguyllc/jpack/es/request'; 

//get product_id from the querystring
var product_id = request.query.get('product_id');

var current_full_url = request.getFullURL();

var full_blog_url = request.appendSlash(request.getDomainWithProtocol())+'blog'; //https://my-domain.com/blog

---

Site

[demo](https://jsfiddle.net/HTMLGuyLLC/L6brcvo3/) | [back to top](#whatsincluded)

A generic website class with properties for id, name, and config - useful for multi-tenant applications where you need to know which site is being viewed

Method/Property	Params (name:type)	Return	Notes
getId		string/int
setId	id:string/int	this
getName		string	this
setName	name:string	this
getConfig		object	this
setConfig	config:object	this	overwrites all config
getConfigItem		mixed	returns an individual item from config
setConfigItem	key:string,val:mixed	this	sets the value of an individual item in config
populate	data:object	this	sets provided values all at once (id,name,config)

Instantiation with current site data:

The easy way:

Create an object named $site with values from your server (prior to including jpack)

<?php
    $user = []; //get user from database/API
?>
<script>
const $user = {
    id: <?php echo $user['id']; ?>,
    fname: "<?php echo $user['fname']; ?>",
    //..
    permissions: JSON.parse("<?php echo json_encode($user['permissions']); ?>"),
    additionalData: JSON.parse("<?php echo json_encode([
        'user_type'=>$user['user_type'],
        //whatever else you might want to pass
    ]); ?>"),
    //..
};
</script>

Then instantiate the Site class in your JS file somewhere

const cur_site = new Site($site);
cur_site.getId();

@see: /examples/CurrentSiteSingleton for a method of instantiating the current site once and using everywhere Note: Even though that creates a singleton which is available anywhere, it's still highly recommended that you pass that object to functions and methods where it is used (dependency injection)

The harder way:

Perform an XHR request to grab site details via a JSON API, then run the populate method on the site object.

import {Site} from '@htmlguyllc/jpack/es/site';
 
//this example uses jQuery's shorthand AJAX call, you can use axios or any request you want
$.get('/my-site-info-endpoint.php', function(data){
    //don't forget error handling!
    const cur_site = new Site(JSON.parse(data));
});

Of course you can use this class for any site, not just the current one, but this is the intended usage.

---

User

[demo](https://jsfiddle.net/HTMLGuyLLC/Lzp5w3rg) | [back to top](#whatsincluded)

A generic user class with properties for id, name, email, phone, etc - also allows for front-end permission checks

Method/Property	Params	Return	Notes
constructor	data:object	self
getId		string/int
setId	id:string/int	this
getIsGuest		bool	if your site has users who don't login but still interact and have a user record (like guest checkout)
setIsGuest	is_guest:bool	this
setIsAdmin		bool	if your site has users who have ultimate permissions and you want to do something based on that
setIsGuest	is_admin:bool	this
getUsername		string
setUsername	username:string	this
getFname		string
setFname	fname:string	this
getLname		string
setLname	lname:string	this
getName		string	returns fname and lname concatenated with a space
getEmail		string
setEmail	email:string	this
getPhone		string
setPhone	phone:string	this
getPermissions		array
setPermissions	permissions:array	this
addPermission	permission:string/int	this
removePermission	permission:string/int	this
hasPermission	permission:string/int	bool
getAdditionalData		object	set any additional data about this user that doesn't fit the default getters and setters here (a better idea would be to extend this object with your custom properties/methods)
setAdditionalData	data:object	this
getDataItem	key:string	mixed	returns a single value from the additional data object/array
setDataItem	key:string, val:mixed	sets a single value in the additional data array/object
populate	data:object	this	sets provided values all at once (id, isGuest, isAdmin, etc)

Instantiation with current user data:

The easy way:

Create an object named $user with values from your server

<script>
const $user = {
    id: <?php echo $user['id']; ?>,
    fname: "<?php echo $user['fname']; ?>",
    //..
    permissions: JSON.parse("<?php echo json_encode($user['permissions']); ?>"),
    additionalData: JSON.parse("<?php echo json_encode([
        'user_type'=>$user['user_type'],
        //whatever else you might want to pass
    ]); ?>"),
    //..
};
</script>

Then instantiate the User class in your JS file somewhere

const cur_user = new User($user);
cur_user.getId();

@see: /examples/CurrentUserSingleton for a method of instantiating the current user once and using everywhere Note: Even though that creates a singleton which is available anywhere, it's still highly recommended that you pass that object to functions and methods where it is used (dependency injection)

The harder way:

Perform an XHR request to grab site details via a JSON API, then run the populate method on the site object.

import {User} from '@htmlguyllc/jpack/es/user';
 
$.get('/my-user-info-endpoint.php', function(data){
    //don't forget error handling!
    const cur_user = new User(JSON.parse(data));
});

Of course you can use this class for any User not just the current one, but that's the intended usage.

---

Strings

[demo](https://jsfiddle.net/HTMLGuyLLC/ebof3hm4/) | [back to top](#whatsincluded)

Contains methods for semi-common string manipulation like creating a getter from a string ('hi' = 'getHi')

Method/Property	Params (name:type)	Return	Notes
ucfirst	string:string	string	capitalizes the first letter of a string like ucfirst in PHP
getter	string:string	string	creates a getter method name from a string
setter	string:string	string	creates a setter method name from a string

To Use:

import {strings} from '@htmlguyllc/jpack/es/strings';

strings.ucfirst('bob'); //returns 'Bob'
strings.getter('name'); //returns 'getName';
strings.setter('name'); //returns 'setName';

---

DOM

[demo](https://jsfiddle.net/HTMLGuyLLC/et42sLbm/) | [back to top](#whatsincluded)

Has methods for converting just about anything into a native DOM Element or array of them (you can provide a string selector, jQuery object, native DOM object, etc). Also has some shortcuts for common DOM checks/manipulation (like removing an element, verifying an element exists in the DOM, or replacing an element with HTML)

Method/Property	Params (name:type)	Return	Notes
getElement	el:mixed, error_on_none:bool, error_on_multiple:bool	Element/HTMLDocument/null	returns a native DOM element for whatever you provide (selector string, array of elements, single element, jQuery wrapped DOM element, etc)
getElements	el:mixed, error_on_none:bool	array	same as getElement, except it returns all matches
remove	el:mixed, error_if_not_found:bool	this	removes elements from the DOM - uses .getElements()
replaceElWithHTML	el:mixed, html:string, error_if_not_found:bool	Element	replaces an element in the DOM with HTML and returns a reference to the new Element
exists	el:mixed	bool	checks to see if it exists in the DOM
multipleExist	el:mixed	bool	checks to see if more than 1 instance exists in the DOM
isVisible	el:mixed, error_if_not_found:bool, error_on_multiple:bool	bool	checks to see if the provided element is visible

To Use:

import {dom} from '@htmlguyllc/jpack/es/dom';

//Dont do this. Most of these are dumb examples.
dom.getElement('.my-fav-button', true, true); //will throw an error if it doesn't find it, or if it finds more than 1
dom.getElements('.links', true); //will throw an error if none are found
dom.getElement('.my-button'); //returns the button, or null (if multiple, it returns the first)
dom.getElements('.links'); //returns an array of any matches for .links
dom.getElement($('a')); //returns the native DOM element for the link and removes the jQuery wrapper
dom.getElement(document.querySelectorAll('a')); //returns the first anchor

dom.exists('a'); //returns true if there is an anchor on the page
dom.multipleExist('a'); //returns true if more than 1 anchor on the page

---

Type Checks

[demo](https://jsfiddle.net/HTMLGuyLLC/5p9q1ofj/) | [back to top](#whatsincluded)

Validate the value of a variable with higher specificity than built-in functions. For instance, you can validate an object contains specific keys and throw errors if not, or if it contains keys that you didn't define

Method/Property	Params (name:type)	Return	Notes
isDataObject	value:object, keys:array, require_all_keys:bool, block_other_keys:bool, throw_error:bool	bool	validates that an object contains data and not a dom element, array, null or anything else that would normally return true when you call typeof

To Use:

import {type_checks} from '@htmlguyllc/jpack/es/type_checks';

var my_obj = {id:null, name:'John Doe', email:'[e-mail]'};

//make sure my_obj contains the keys: 'id', 'name', 'email'
//force all keys to exist
//block any keys that aren't in that list
//throw an error if the object fails any checks
type_checks.isDataObject(my_obj, ['id', 'name', 'email'], true, true, true);

---

Events

[demo](https://jsfiddle.net/HTMLGuyLLC/wv2hkzp5/) | [back to top](#whatsincluded)

Includes methods for attaching event handlers including shorthand methods which create handlers that prevent the browser's default action (onclick, onsubmit)

Method/Property	Params (name:type)	Return	Notes
setGlobal	namespace:string/null	self	adds each of the following functions to the global scope, a namespace is optional, but recommended. Use at your own risk! These may cause conflicts!
onClick	el:mixed, callback:function	handler:function	prevents the browser's default so you can handle link clicks and form submissions with less code - returns an updated handler in case you need to remove it later
onSubmit	el:mixed, callback:function	handler:function	same as .onClick() but for submit - returns an updated handler in case you need to remove it later
onEventPreventDefault	el:mixed, event:string, callback:function	callback:function	generates and attaches a handler which prevents the default action - returns the updated handler in case you need to remove it later
on	el:mixed, event:string, callback:function	array	attaches an event listener
off	el:mixed, event:string, callback:function	array	removes an event listener
trigger	el:mixed, event:string, event_options:mixed	array	triggers an event on an element/elements - uses .getElements()

To Use:

import {events} from '@htmlguyllc/jpack/es/events';

var preventedHandler = events.onClick('a.my-link', function(){
   //do something without the page redirecting to the href 
});
//now remove that handler
events.off('a.my-link', 'click', preventedHandler);

var handler = events.onSubmit('form.my-form', function(){
   //do something and submit the form using XHR 
});

//trigger submit on a form and pass an object as additional data in the event
events.trigger('.my-form', 'submit', {id:1});

Setting with a custom namespace (or no namespace):

import {events} from '@htmlguyllc/jpack/es/events';

events.setGlobal();

onClick('a', function(){
   //do something - href is prevented! 
});

---

ToggleOnMobile

[demo](https://jsfiddle.net/HTMLGuyLLC/68og394L/) | [back to top](#whatsincluded)

Toggle an element's visibility when you click a button. By default, the element is visible, but if the button is visible, the element will be hidden until the button is clicked. If the element is visible and the user clicks outside of it, the element is hidden. If the window is resized, the element will be shown or hidden based on visibility of the button.

Method/Property	Params (name:type)	Return	Notes
constructor	btn:mixed, toggle_el:mixed, toggle_class:string, hide_on_outside_click:bool	self
init		self	attaches event handlers and immediately adjusts the visibility
destroy		self	removes event handlers - does not change the class

To Use:

import {ToggleOnMobile} from '@htmlguyllc/jpack/es/toggle';

const toggle = new ToggleOnMobile('.toggle-sidebar-btn', '.sidebar', 'visible', true);

toggle.init();

//and later if you want to, toggle.destroy();