Magento 2: How to use Cookie?

app/code/Custom/Module/view/frontend/templates/sample.phtml

<script type="text/javascript">
    require([
        'jquery',
        'jquery/jquery.cookie'
    ], function ($) {
        $(document).ready(function () {

            var check_cookie = $.cookie('foo'); // Get Cookie Value
            var date = new Date();
            var minutes = 60;
            date.setTime(date.getTime() + (minutes * 60 * 1000));
            $.cookie('foo', '', {path: '/', expires: -1}); // Expire Cookie
            $.cookie('foo', 'bar', {expires: date}); // Set Cookie Expiry Time
            $.cookie('foo', 'setvalue'); // Set Cookie Value
        });// You need to add ); to correct burg in your code
    }); 
</script>

Helpful Article on PHP Side: https://webkul.com/blog/set-get-data-cookie-magento2/

In the target.phtml, add js codes like below.

Set the cookies

<script>
    require([
        'jquery',
        'jquery/jquery.cookie'
    ], function ($) {
       $.cookie('cookie_name', 'value', { expires: 7, path: '/' });//Set the cookies
    });
</script>

jquery/jquery.cookie is defined in the file lib/web/jquery/jquery.cookie.js. Below is parameter description.

expires

Define when the cookie will be removed. Value must be a Number which will be interpreted as days from time of creation or a Date instance. If omitted, the cookie becomes a session cookie.

path

If you want get the value from another page, notice the path setting { path: '/' }.

Because cookies are only accessible to the specified path and any subpaths , more discussion about this you could see here Cookie path and its accessibility to subfolder pages.

---

Get the cookies

<script>
    require([
        'jquery',
        'jquery/jquery.cookie'
    ], function ($) {
        var temp = $.cookie('cookie_name');//Get the cookies
    });
</script>

---

Supplement

mage/cookies

mage/cookies could replace jquery/jquery.cookie, it did some initialization work which you could see it in the file lib/web/mage/cookies.js.

Usage: $.mage.cookies.set('name', 'value', {lifetime: -1});

use cookie in PHP

You could use the php class in this answer https://magento.stackexchange.com/a/100142/44237

You can store cookie in js file using below method,

define([
    'jquery',
    'mage/cookies'
], function ($) {
    $.cookie('cookiename', cookievalue);
});