JavaScript preprocessors can help make authoring JavaScript easier and more convenient. For instance, CoffeeScript can help prevent easy-to-make mistakes and offer a cleaner syntax and Babel can bring ECMAScript 6 features to browsers that only support ECMAScript 5.
Any URL's added here will be added as <script>
s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.
You can apply a script from anywhere on the web to your Pen. Just put a URL to it here and we'll add it, in the order you have them, before the JavaScript in the Pen itself.
If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying.
You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.
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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.
<div class="tv">
<div id="term"></div>
<div class="flicker"></div>
<div class="scanlines"></div>
</div>
/*
* style based on http://js13kgames.com/entries/lost-in-cyberspace
*/
body {
margin: 0;
background: black;
}
#term {
height: 100vh;
}
:root {
--background: #031e11;
--size: 1.5;
}
/* to see yourself like in a mirror */
.self {
transform: scale(-1, 1);
}
/* flicker animation taken from http://goonhub.com/secret */
.flicker {
position: fixed;
top: 0;
left: 0;
bottom: 0;
right: 0;
background: rgba(18, 16, 16, 0.2);
opacity: 0;
z-index: 1000;
pointer-events: none;
animation: flicker 0.12s infinite;
}
@keyframes flicker {
0% {
opacity: 0.552;
}
5% {
opacity: 0.48287;
}
10% {
opacity: 0.59134;
}
15.0% {
opacity: 0.79543;
}
20% {
opacity: 0.75134;
}
25% {
opacity: 0.1956;
}
30.0% {
opacity: 0.90687;
}
35% {
opacity: 0.122;
}
40% {
opacity: 0.62254;
}
45% {
opacity: 0.56977;
}
50% {
opacity: 0.9925;
}
55.0% {
opacity: 0.55487;
}
60.0% {
opacity: 0.16607;
}
65% {
opacity: 0.12353;
}
70% {
opacity: 0.2214;
}
75% {
opacity: 0.67908;
}
80% {
opacity: 0.97163;
}
85.0% {
opacity: 0.1275;
}
90% {
opacity: 0.37186;
}
95% {
opacity: 0.24475;
}
100% {
opacity: 0.37221;
}
}
/* glow */
.terminal {
text-shadow: 0 0.2rem 1rem #0c7b46;
}
/* based on
https://blog.carbonfive.com/2015/01/07/vintage-terminal-effect-in-css3/
*/
.scanlines {
top: 0;
left: 0;
height: 100%;
width: 100%;
background: linear-gradient(
to bottom,
rgba(255,255,255,0),
rgba(255,255,255,0) 50%,
rgba(0,0,0,.2) 70%,
rgba(0,0,0,.6)
);
background-size: 100% .3rem;
position: fixed;
pointer-events: none;
}
.scanlines:before {
position: absolute;
top: 0px;
width: 100%;
height: 5px;
background: #fff;
background: linear-gradient(to bottom,
rgba(255,0,0,0) 0%,
rgba(255,250,250,1) 50%,
rgba(255,255,255,0.98) 51%,
rgba(255,0,0,0) 100%
); /* W3C */
opacity: .1;
}
.scanlines:after {
box-shadow: 0 2px 6px rgba(25,25,25,0.2),
inset 0 1px rgba(50,50,50,0.1),
inset 0 3px rgba(50,50,50,0.05),
inset 0 3px 8px rgba(64,64,64,0.05),
inset 0 -5px 10px rgba(25,25,25,0.1);
}
#term:focus-within + .scanlines:before {
content: '';
animation: vline calc(var(--time, 2) * 1s) linear infinite;
}
/*
* MS Edge don't support focus-within and css vars
* inside pseudo selector
*/
@supports (-ms-ime-align:auto) {
.scanlines:before {
content: '';
animation: vline 3s linear infinite;
}
}
@keyframes vline {
to { transform: translate(0, 100vh)}
}
/* turn off animation */
.tv {
height: 100vh;
position: relative;
}
.tv.collapse {
animation: size 2s ease-out;
animation-fill-mode: forwards;
}
.tv.collapse:before {
content: '';
display: block;
height: 100%;
position: absolute;
left: 0;
right: 0;
bottom: 0;
top: 0;
background: white;
z-index: 1;
opacity: 0;
animation: opacity 2s ease-out;
animation-fill-mode: forwards;
}
@keyframes opacity {
to { opacity: 1; }
}
@keyframes size {
50% {
transform: scaleX(calc(1 / var(--width)));
opacity: 1;
}
98% {
transform: scaleX(calc(1 / var(--width))) scaleY(calc(1 / var(--height)));
opacity: 1;
}
100% {
transform: scaleX(calc(1 / var(--width))) scaleY(calc(1 / var(--height)));
opacity: 0;
}
}
var scanlines = $('.scanlines');
var tv = $('.tv');
function exit() {
$('.tv').addClass('collapse');
term.disable();
}
var term = $('#term').terminal(function(command, term) {
if (command.match(/^\s*exit\s*$/)) {
exit();
} else if (command !== '') {
try {
var result = window.eval(command);
if (result && typeof result === 'object') {
tree(result);
} else if (result !== undefined) {
term.echo(new String(result));
}
} catch(e) {
term.error(new String(e));
}
}
}, {
name: 'js_demo',
onResize: set_size,
exit: false,
// detect iframe codepen preview
enabled: $('body').attr('onload') === undefined,
onInit: function() {
set_size();
this.echo('Type [[b;#fff;]exit] to see turn off animation.');
this.echo('Type and execute [[b;#fff;]grab()] function to get the scre' +
'enshot from your camera');
this.echo('Type [[b;#fff;]camera()] to get video and [[b;#fff;]pause()]/[[b;#fff;]play()] to stop/play');
},
onClear: function() {
console.log(this.find('video').length);
this.find('video').map(function() {
console.log(this.src);
return this.src;
});
},
prompt: 'js> '
});
// for codepen preview
if (!term.enabled()) {
term.find('.cursor').addClass('blink');
}
function set_size() {
// for window height of 170 it should be 2s
var height = $(window).height();
var width = $(window).width()
var time = (height * 2) / 170;
scanlines[0].style.setProperty("--time", time);
tv[0].style.setProperty("--width", width);
tv[0].style.setProperty("--height", height);
}
function tree(obj) {
term.echo(treeify.asTree(obj, true, true));
}
var constraints = {
audio: false,
video: {
width: { ideal: 1280 },
height: { ideal: 1024 },
facingMode: "environment"
}
};
var acceptStream = (function() {
return 'srcObject' in document.createElement('video');
})();
function camera() {
if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
term.pause();
var media = navigator.mediaDevices.getUserMedia(constraints);
// TODO: this will create memory leaks when resize Object url will not be revoked
media.then(function(mediaStream) {
term.resume();
var stream;
if (!acceptStream) {
stream = window.URL.createObjectURL(mediaStream);
} else {
stream = mediaStream;
}
term.echo('<video data-play="true" class="self"></video>', {
raw: true,
finalize: function(div) {
var video = div.find('video');
if (!video.length) {
return;
}
if (acceptStream) {
video[0].srcObject = stream;
} else {
video[0].src = stream;
}
if (video.data('play')) {
video[0].play();
}
}
});
});
}
}
var play = function() {
var video = term.find('video').slice(-1);
if (video.length) {
video[0].play();
}
}
function pause() {
term.find('video').each(function() {
this.pause();
});
}
function grab() {
if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
term.pause();
var media = navigator.mediaDevices.getUserMedia(constraints);
media.then(function(mediaStream) {
const mediaStreamTrack = mediaStream.getVideoTracks()[0];
const imageCapture = new ImageCapture(mediaStreamTrack);
return imageCapture.takePhoto();
}).then(function(blob) {
term.echo('<img src="' + URL.createObjectURL(blob) + '" class="self"/>', {
raw: true,
finialize: function(div) {
div.find('img').on('load', function() {
URL.revokeObjectURL(this.src);
});
}
}).resume();
}).catch(function(error) {
term.error('Device Media Error: ' + error);
});
}
}
async function pictuteInPicture() {
var [video] = $('video');
try {
if (video) {
if (video !== document.pictureInPictureElement) {
await video.requestPictureInPicture();
} else {
await document.exitPictureInPicture();
}
}
} catch(error) {
term.error(error);
}
}
function clear() {
term.clear();
}
github('jcubic/jquery.terminal');
cssVars(); // ponyfill
Also see: Tab Triggers