I added javascript but didn't show

I added javascript particles.js
https://vincentgarreau.com/particles.js/
I downloaded and extract in child theme, i added css code

/* —- base —- */
html{
-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
canvas{
display:block;
vertical-align:bottom;
}
/* —- particles.js container —- */
#particles-js {
position:absolute;
width: 100%;
height: 100%;
background-image: url(”);
background-size: cover;
background-position: 50% 50%;
background-repeat: no-repeat;
top: 0;
}

/* =============================================================================
HTML5 CSS Reset Minified – Eric Meyer
========================================================================== */

html,body,div,span,object,iframe,h1,h2,h3,h4,h5,h6,p,blockquote,pre,abbr,address,cite,code,del,dfn,em,img,ins,kbd,q,samp,small,strong,sub,sup,var,b,i,dl,dt,dd,ol,ul,li,fieldset,form,label,legend,table,caption,tbody,tfoot,thead,tr,th,td,article,aside,canvas,details,figcaption,figure,footer,header,hgroup,menu,nav,section,summary,time,mark,audio,video{margin:0;padding:0;border:0;outline:0;font-size:100%;vertical-align:baseline;background:transparent}
body{line-height:1}
article,aside,details,figcaption,figure,footer,header,hgroup,menu,nav,section{display:block}
nav ul{list-style:none}
blockquote,q{quotes:none}
blockquote:before,blockquote:after,q:before,q:after{content:none}
a{margin:0;padding:0;font-size:100%;vertical-align:baseline;background:transparent;text-decoration:none}
mark{background-color:#ff9;color:#000;font-style:italic;font-weight:bold}
del{text-decoration:line-through}
abbr[title],dfn[title]{border-bottom:1px dotted;cursor:help}
table{border-collapse:collapse;border-spacing:0}
hr{display:block;height:1px;border:0;border-top:1px solid #ccc;margin:1em 0;padding:0}
input,select{vertical-align:middle}
li{list-style:none}

/* =============================================================================
My CSS
========================================================================== */

/* —- base —- */

html,body{
width:100%;
height:100%;
background:#111;
}

html{
-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

body{
font:normal 75% Arial, Helvetica, sans-serif;
}

canvas{
display:block;
vertical-align:bottom;
}

/* —- stats.js —- */

.count-particles{
background: #000022;
position: absolute;
top: 48px;
left: 0;
width: 80px;
color: #13E8E9;
font-size: .8em;
text-align: left;
text-indent: 4px;
line-height: 14px;
padding-bottom: 2px;
font-family: Helvetica, Arial, sans-serif;
font-weight: bold;
}

.js-count-particles{
font-size: 1.1em;
}

#stats,
.count-particles{
-webkit-user-select: none;
margin-top: 5px;
margin-left: 5px;
}

#stats{
border-radius: 3px 3px 0 0;
overflow: hidden;
}

.count-particles{
border-radius: 0 0 3px 3px;
}

/* —- particles.js container —- */

#particles-js{
width: 100%;
height: 100%;
background-color: #b61924;
background-image: url(”);
background-size: cover;
background-position: 50% 50%;
background-repeat: no-repeat;
}
i added js code in app.js

“particles”: {
“number”: {
“value”: 80,
“density”: {
“enable”: true,
“value_area”: 800
}
},
“color”: {
“value”: “#ffffff”
},
“shape”: {
“type”: “circle”,
“stroke”: {
“width”: 0,
“color”: “#000000”
},
“polygon”: {
“nb_sides”: 5
},
“image”: {
“src”: “img/github.svg”,
“width”: 100,
“height”: 100
}
},
“opacity”: {
“value”: 0.5,
“random”: false,
“anim”: {
“enable”: false,
“speed”: 1,
“opacity_min”: 0.1,
“sync”: false
}
},
“size”: {
“value”: 5,
“random”: true,
“anim”: {
“enable”: false,
“speed”: 40,
“size_min”: 0.1,
“sync”: false
}
},
“line_linked”: {
“enable”: true,
“distance”: 150,
“color”: “#ffffff”,
“opacity”: 0.4,
“width”: 1
},
“move”: {
“enable”: true,
“speed”: 6,
“direction”: “none”,
“random”: false,
“straight”: false,
“out_mode”: “out”,
“attract”: {
“enable”: false,
“rotateX”: 600,
“rotateY”: 1200
}
}
},
“interactivity”: {
“detect_on”: “canvas”,
“events”: {
“onhover”: {
“enable”: true,
“mode”: “repulse”
},
“onclick”: {
“enable”: true,
“mode”: “push”
},
“resize”: true
},
“modes”: {
“grab”: {
“distance”: 400,
“line_linked”: {
“opacity”: 1
}
},
“bubble”: {
“distance”: 400,
“size”: 40,
“duration”: 2,
“opacity”: 8,
“speed”: 3
},
“repulse”: {
“distance”: 200
},
“push”: {
“particles_nb”: 4
},
“remove”: {
“particles_nb”: 2
}
}
},
“retina_detect”: true,
“config_demo”: {
“hide_card”: false,
“background_color”: “#b61924”,
“background_image”: “”,
“background_position”: “50% 50%”,
“background_repeat”: “no-repeat”,
“background_size”: “cover”
}
i added code in function.php
function enfold_customization_custom_js() {
?>
<script type = “text/javascript” src = “http://test.jskindustrial.com/wp-content/themes/enfold-child/particles.js-master/particles.js-master/particles.js”></script&gt;
<script type = “text/javascript” src = “http://test.jskindustrial.com/wp-content/themes/enfold-child/particles.js-master/app.js”></script&gt;
<?php
}
add_action( ‘wp_footer’, ‘enfold_customization_custom_js’ );
but it show nothing in output