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Autocomplete like Basecamp?

I'm currently learning website design, I have started creating my own Basecamp like website (project management tool). I am in need of a plugin or a tutorial on autocomplete input javascript like Basecamp... however i'm unsure on how to set this up as i'm super new to javascript and still trying to get my head around it all.

Use the multiple search selection feature from Semantic UI's dropdown module:
https://semantic-ui.com/modules/dropdown.html#multiple-search-selection
Here's a sample jsfiddle: https://jsfiddle.net/9wnjra1z/
<form class="ui form">
<div class="field">
<label>Assigned to</label>
<div class="ui fluid multiple search selection dropdown">
<input type="hidden" name="users" />
<i class="dropdown icon"></i>
<div class="default text">Select Users</div>
<div class="menu">
<div class="item" data-value="kristin_aardsma">
<img class="ui avatar image" src="https://semantic-ui.com/images/avatar/small/jenny.jpg">
<span>Kristin Aardsma</span>
</div>
<div class="item" data-value="jonny_cyrus">
<img class="ui avatar image" src="https://semantic-ui.com/images/avatar/small/elliot.jpg">
<span>Jonny Cyrus</span>
</div>
<div class="item" data-value="stevie">
<img class="ui avatar image" src="https://semantic-ui.com/images/avatar/small/stevie.jpg">
<span>Stevie</span>
</div>
<div class="item" data-value="matt">
<img class="ui avatar image" src="https://semantic-ui.com/images/avatar/small/matt.jpg">
<span>Matt</span>
</div>
</div>
</div>
</div>
</form>
You will need the following references in your code to use this library:
https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js
https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.4.1/semantic.min.css
https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.4.1/semantic.min.js

Dynamically created dropdown menu isn't opening

I created dropdown dynamically using javascript but when I tried opening the dropdown menu, it doesn't open at all.
This is how I created the dropdown dynamically:
$('#contentdiv').append("<div class='ui fluid selection dropdown'><input type='hidden' name='user'/><i class='dropdown icon'></i><div class='default text'>Select Friend/Follower</div><div class='menu' id='menu'>");
for(var k=0;k<fflist.length;k++)
{
$('#menu').append("<div class='item' data-value='"+fflist[k]+"'>"+fflist[k]+"</div>");
}
$('#contentdiv').append("</div></div>");
Web console show the element as this, I can't find any problem:
<div class="ui fluid selection dropdown">
<input type="hidden" name="user">
<i class="dropdown icon"></i>
<div class="default text">Select Friend/Follower</div>
<div class="menu" id="menu">
<div class="item" data-value="DivyanshuGaur16">DivyanshuGaur16</div>
<div class="item" data-value="akshaykumar">akshaykumar</div>
<div class="item" data-value="aamir_khan">aamir_khan</div>
<div class="item" data-value="SrBachchan">SrBachchan</div>
<div class="item" data-value="UncleOBEY">UncleOBEY</div>
<div class="item" data-value="Waakye_Orgasm">Waakye_Orgasm</div>
<div class="item" data-value="Iamdbeatz">Iamdbeatz</div>
<div class="item" data-value="KwameUltd">KwameUltd</div>
</div>
</div>

How to include different view in the same html page with framework7?

I'm a beginner with framework 7. I'm developing a little app and I split the html code in different files because i have a lot of pages with div in common. My problem is: I have a page.html, inside my page.html I'd like to include different div in the same windows from different html files.
for example in php we can do it with a
include("");
but in framework7 I can include only one with
<div class="view view-main view-init" data-url="/page/" data-name="page"></div>
I'd like to include more one view like this
<div class="view view-main view-init" data-url="/page1/" data-name="page1"></div>
<div class="view view-main view-init" data-url="/page2/" data-name="page2"></div>
i put an image here to explain me better.
what i'd like to do
Thank you for your help.
pages.html
<div data-name="pages" class="page">
<div class="page-content pg-no-padding">
<div class="row justify-content-center">
<div class="col-100 tablet-100 desktop-80">
<div class="block">
<form class="list" id="pages1">
<div class="row justify-content-center">
<div class="block-title">
<h1> Pages</h1>
</div> <!--block-title-->
</div><!--row-->
<div class="row">
<div class="col">
<div class="block-title">
<h2> Card 1</h2>
</div>
<div class="card">
<div class="card-content card-content-padding">
<div class="row">
<div class="col-100 tablet-auto desktop-auto">
<div class="list no-hairlines-md">
<ul>
<li class="item-content item-input">
<div class="item-inner">
<div class="item-title item-label">Input1</div>
<div class="item-input-wrap">
<input type="number" placeholder="" name="">
<span class="input-clear-button"></span>
</div>
</div>
</li>
<li class="item-content item-input">
<div class="item-inner">
<div class="item-title item-label">Input2</div>
<div class="item-input-wrap">
<input type="number" placeholder="" name="">
<span class="input-clear-button"></span>
</div>
</div>
</li>
</ul>
</div>
</div><!--col-->
</div><!--row-->
</div><!--card-content-->
</div><!--card-->
</div><!--col-->
</div><!--row-->
Here I'd like to include the code inside pages1.html
Here I'd like to include the code inside pages2.html
</form>
</div><!--block-->
<div class="block">
<a class="col button button-fill" href="#">Salva</a>
</div>
</div><!--col-100-->
</div><!--row-->
</div> <!-- ./ page-content-->
pages1.html
<div class="row">
<div class="col">
<div class="block-title">
<h2> Card2</h2>
</div>
<div class="card">
<div class="card-content card-content-padding">
<div class="row">
<div class="col-100 tablet-auto desktop-auto">
<div class="list no-hairlines-md">
<ul>
<li class="item-content item-input">
<div class="item-inner">
<div class="item-title item-label">Input1</div>
<div class="item-input-wrap">
<input type="number" placeholder="" name="">
<span class="input-clear-button"></span>
</div>
</div>
</li>
<li class="item-content item-input">
<div class="item-inner">
<div class="item-title item-label">Input2</div>
<div class="item-input-wrap">
<input type="number" placeholder="" name="">
<span class="input-clear-button"></span>
</div>
</div>
</li>
</ul>
</div>
</div><!--col-->
</div><!--row-->
</div><!--card-content-->
</div><!--card-->
</div><!--col-->
</div><!--row-->

To include Multiple Views Layout you need to do this:
You need to create wrapper with class views like this: <div class="views tabs">
You need to create div view like this: <div class="view view-main tab tab-active" id="view-1">.related page..</div><div class="view tab" id="view-2">.related page..</div>
You need to make sure thats only one views class wrapper.
In Js: You can control multiple views by this:
var view1 = app.views.create('#view-1', {...});
var view2 = app.views.create('#view-2', {...});
For more details: F7 View
For Embedded Multi view not like tab:
Example
Note: for each view in F7 is got 100% height...you need to make sure thats height is equal 100% finally

EDIT: After a long investigation, I found from the documentation that you can do it like this:
<!-- in your views page, just add these parameter to your view you want to inherit -->
<div class="view view-init" data-url="/your-page/" data-name="home" data-push-state="true">
...
</div>
And in your routers, will need to define your route as well:
var app = new Framework7({
root: '#app',
// Create routes for all pages
routes: [
{
path: '/',
url: 'index.html',
},{
// Add your contents page route
path: '/your-page/',
url: 'pages/your-page.html',
},
.....
});
Hope this help.

Semantic UI Dropdown Search - selecting with the enter key

I've been working with Semantic UI for a project. I'm using the Search Selection version of the dropdown (classes are 'ui fluid search selection dropdown'). Under each item, I have setup a custom data-dogs attribute, with either 0 or 1. If the selected item has a data-dogs value of 1, I need an item on my form to show, or hide if it's a 0.
It's working fine on the mouse click, but I'm rather rusty with JS, so I'm not sure if there is an easy way to get the same functionality with the enter key and up/down arrows).
The JS code I've made is below.
If anyone could give me some pointers, I'd very much appreciate it.
Many thanks in advance!
$('.item').on('click', function(){
if($(this).data('dogs')==1){
$('#dogCheckbox').removeClass('hidden');
console.log('Working?');
} else {
$('#dogCheckbox').addClass('hidden');
}
}
);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="ui fluid search selection dropdown">
<input type="hidden" name="location" id="location_search">
<i class="dropdown icon"></i>
<div class="default text"></div>
<div class="menu">
<div class="item" data-value="1" data-dogs="0">A1</div>
<div class="item" data-value="2" data-dogs="0">A2</div>
<div class="item" data-value="3" data-dogs="0">A3</div>
<div class="item" data-value="4" data-dogs="0">A4</div>
<div class="item" data-value="5" data-dogs="0">A5</div>
<div class="item" data-value="6" data-dogs="0">A6</div>
<div class="item" data-value="7" data-dogs="0">A7</div>
<div class="item" data-value="8" data-dogs="0">A8</div>
<div class="item" data-value="9" data-dogs="1">A9</div>
<div class="item" data-value="10" data-dogs="1">A10</div>
<div class="item" data-value="11" data-dogs="1">A11</div>
<div class="item" data-value="12" data-dogs="0">A12</div>
<div class="item" data-value="13" data-dogs="1">A14</div>
<div class="item" data-value="14" data-dogs="1">A15</div>
<div class="item" data-value="15" data-dogs="1">A16</div>
</div>
</div>
<div class="ui checkbox hidden" id="dogCheckbox">
<input type="checkbox" tabindex="0" class="hidden" name="
form_dog">
<label>Dog friendly unit! Is a dog present?</label>
</div>

You can try this:
$(".item").keyup(function(event){
if(event.keyCode == 13){
$('.item').click();
}
});
13 is the Enter key code, so- when keyup event occurs, and the pressed key is Enter- do the click function.
Hope it helps

Manage complex select/deselect artis/album/song

First of all sorry for the vague title, but i didn’t know how to explain my problem in a better way.
Anyway this is what i want. Let’s say we have three tabs: one showing artist list, one showing album list and one showing songs. All this three tabs has selectable lists and i would like to be able, for example, to select and artist, then going to albums (that now should be show all as selected because i checked the artis) and be able to deselect one album and then, for, example, be able to go to songs and manage the songs individually.
Of course then i should be able to retrive the list of all the songs selected by the user.
EDIT 1
added two images to explain better
EDIT 2
Added some code. At the moment i have only HTML and CSS, i'm waiting for your help for the JS code :)
that's the HTML structure
<div id="tabs" class="page-content tabs overflowTab">
<div id="tab1" class="tab active">
<div class="content-block-title" id="indexScrollOffset">Seleziona artisti</div>
<div class="list-block media-list">
<ul>
<li>
<div class="item-content.modificato">
<div class="item-media modificato">
<i class="icon icon-form-checkbox modificato"></i>
</div>
<a href="#" class="item-link" id="apriTitoliLibro1">
<div class="item-inner modificato">
<div class="item-title-row">
<div class="item-title">Artist 1</div>
</div>
<div class="item-subtitle">Some Text</div>
</div>
</a>
</div>
</li>
<li>
<div class="item-content.modificato">
<div class="item-media modificato">
<i class="icon icon-form-checkbox modificato"></i>
</div>
<a href="#" class="item-link" id="apriTitoliLibro2">
<div class="item-inner modificato">
<div class="item-title-row">
<div class="item-title">Artist 2</div>
</div>
<div class="item-subtitle">Some Text</div>
</div>
</a>
</div>
</li>
[...]
</ul>
</div>
</div>
<div id="tab2" class="tab">
<div class="content-block-title">Seleziona Album</div>
<div class="list-block media list">
<div class="list-group">
<ul>
<li class="list-group-title">Artist 1</li>
<li id="titoliLibro1">
<div class="item-content-modificato titoli">
<div class="item-media modificato fake-media-list">
<i class="icon icon-form-checkbox modificato"></i>
</div>
<a href="personalizzaArticoli.html" class="item-link">
<div class="item-inner modificato titoli">
<div class="item-title-row modificato">
<div class="item-title modificato">Album 1</div>
<div class="item-after modificato"><span class="font-size-artt-label">Some text</div>
</div>
</div>
</a>
</div>
</li>
<li>
<div class="item-content-modificato titoli">
<div class="item-media modificato fake-media-list">
<i class="icon icon-form-checkbox modificato"></i>
</div>
<a href="personalizzaArticoli.html" class="item-link">
<div class="item-inner modificato titoli">
<div class="item-title-row modificato">
<div class="item-title modificato">Album 2</div>
<div class="item-after modificato"><span class="font-size-artt-label">Some text</div>
</div>
</div>
</a>
</div>
</li>
[...]
</ul>
</div>
</div>
</div>
<div id="tab3" class="tab">
<div class="content-block-title">Seleziona song</div>
<div class="list-block searchbar-not-found">
<ul>
<li class="item-content">
<div class="item-inner">
CONTENT HERE IS ADDED DYNAMICALLY FROM A WEBSQL DB
</div>
</li>
</ul>
</div>
</div>
Edit 3
It's a phonegap application and yes, already using jQuery (as less as possibile for performance) :)
Now my question: which is the best way to handle this? My only idea is to create an array and update it with all the elements selected and, in order to show an element as selected or not, checking it with indexOf to see if it exist… is this a good way? I’m a bit worried about performance.
Thanks