Polymer 2 slick imports

<link rel="import" href="https://polygit.org/components/polymer/polymer-element.html">
<!--<link rel="import" href="slick-imports.html">-->
<link rel="import" href="slick-css.html">

<script type="text/javascript" src="//code.jquery.com/jquery-1.11.0.min.js"></script>

<script type="text/javascript" src="//cdn.jsdelivr.net/jquery.slick/1.6.0/slick.min.js"></script>

<dom-module id="workadvisor-module-news">
  <template>
    <style include="slick-css">
      
    </style>
    
    <div id="sliderNews">
        <div><img src="http://lorempixel.com/300/300/sports/Dummy-Text0/"></div>
        <div><img src="http://lorempixel.com/300/300/sports/Dummy-Text1/"></div>
        <div><img src="http://lorempixel.com/300/300/sports/Dummy-Text2/"></div>
        <div><img src="http://lorempixel.com/300/300/sports/Dummy-Text3/"></div>
        <div><img src="http://lorempixel.com/300/300/sports/Dummy-Text4/"></div>
    </div>

</template>
<script>

    class WorkadvisorModuleNews extends Polymer.Element {

        static get is() { return 'workadvisor-module-news'; }

        static get properties() { return {

            placeholderImg: {
                type: String,
                observer: '_placeholderImgChanged'
            }

        }}

        constructor() {
            super();
        }

        ready() {
            super.ready();
            //console.log(2);
        }

        connectedCallback() {
          
            super.connectedCallback();
            //console.log(1);
            $(this.$.sliderNews).slick({
                infinite: true,
                arrows: true,
                dots: true,
                slidesToShow: 1
            });

        }
    }

    customElements.define(WorkadvisorModuleNews.is, WorkadvisorModuleNews);

</script>

</dom-module>

<!DOCTYPE html>
<html lang="en">
  <head>
    <script src="https://polygit.org/webcomponentsjs+1.0.0-rc.5/components/webcomponentsjs/webcomponents-loader.js"></script>
    <link rel="import" href="workadvisor-module-news.html">
  </head>
  <body>
    <workadvisor-module-news></workadvisor-module-news>
  </body>
</html>

Polymer 2 template


<script type="text/javascript" src="//code.jquery.com/jquery-1.11.0.min.js"></script>

<script type="text/javascript" src="//cdn.jsdelivr.net/jquery.slick/1.6.0/slick.min.js"></script>

<dom-module id="slick-css">
  <template>
    <style>
      /* Slider */
.slick-slider
{
    position: relative;

    display: block;
    box-sizing: border-box;

    -webkit-user-select: none;
       -moz-user-select: none;
        -ms-user-select: none;
            user-select: none;

    -webkit-touch-callout: none;
    -khtml-user-select: none;
    -ms-touch-action: pan-y;
        touch-action: pan-y;
    -webkit-tap-highlight-color: transparent;
}

.slick-list
{
    position: relative;

    display: block;
    overflow: hidden;

    margin: 0;
    padding: 0;
}
.slick-list:focus
{
    outline: none;
}
.slick-list.dragging
{
    cursor: pointer;
    cursor: hand;
}

.slick-slider .slick-track,
.slick-slider .slick-list
{
    -webkit-transform: translate3d(0, 0, 0);
       -moz-transform: translate3d(0, 0, 0);
        -ms-transform: translate3d(0, 0, 0);
         -o-transform: translate3d(0, 0, 0);
            transform: translate3d(0, 0, 0);
}

.slick-track
{
    position: relative;
    top: 0;
    left: 0;

    display: block;
}
.slick-track:before,
.slick-track:after
{
    display: table;

    content: '';
}
.slick-track:after
{
    clear: both;
}
.slick-loading .slick-track
{
    visibility: hidden;
}

.slick-slide
{
    display: none;
    float: left;

    height: 100%;
    min-height: 1px;
}
[dir='rtl'] .slick-slide
{
    float: right;
}
.slick-slide img
{
    display: block;
}
.slick-slide.slick-loading img
{
    display: none;
}
.slick-slide.dragging img
{
    pointer-events: none;
}
.slick-initialized .slick-slide
{
    display: block;
}
.slick-loading .slick-slide
{
    visibility: hidden;
}
.slick-vertical .slick-slide
{
    display: block;

    height: auto;

    border: 1px solid transparent;
}
.slick-arrow.slick-hidden {
    display: none;
}
    </style>
  </template>
  
</dom-module>