Develop Reference

Question on element alignment and how cursor is able to stay flush with the text in this editable code textarea?

Looking at this codepen, most of it I grok. But a couple of things I don't understand:
How does the <code> element stay perfectly on top of the <textarea>? I would expect it to be below the textarea looking at the HTML code.
How is the cursor staying so well-aligned with the text such that it functions like the type of cursor in a word document? The cursor even aligns well with the text when I copy and paste the text. Is it the emmet dependency that's helping?
Here is the code:
HTML
<div class="editor-holder">
<ul class="toolbar">
<li><i class="fa fa-indent"></i></li>
<li><i class="fa fa-expand"></i></li>
</ul>
<div class="scroller">
<textarea class="editor allow-tabs"><div class="Editable Textarea">
<h1>This is a fully editable textarea which auto highlights syntax.</h1>
<p>Type or paste any code in here...</p>
<div>
<?php
var simple = "coding";
?>
<script>
with = "Tab or double space functionality";
</script></textarea>
<pre><code class="syntax-highight html"></code></pre>
</div>
</div>
(S)CSS
html, body{
margin: 0;
padding: 0;
height: 100%;
width: 100%;
position: relative;
background: rgb(114, 195, 195);
}
.editor-holder{
width: 800px;
height: 500px;
margin-top: 50px;
border-radius: 3px;
position: relative;
top: 0;
margin-left: -400px;
left: 50%;
background: #1f1f1f !important;
overflow: auto;
box-shadow: 5px 5px 10px 0px rgba(0, 0, 0, 0.4);
transition: all 0.5s ease-in-out;
&.fullscreen{
width: 100%;
height: 100%;
margin: 0;
left: 0;
}
.toolbar{
width: 100%;
list-style: none;
position: absolute;
top: -2px;
margin: 0;
left: 0;
z-index: 3;
padding: 8px;
background: #afafaf;
li{
display: inline-block;
}
a{
line-height: 20px;
background: rgba(144, 144, 144, 0.6);
color: grey;
box-shadow: inset -1px -1px 1px 0px rgba(0,0,0,0.28);
display: block;
border-radius: 3px;
cursor: pointer;
&:hover{
background: rgba(144, 144, 144, 0.8);
}
&.active{
background: rgba(144, 144, 144, 0.8);
box-shadow: none;
}
}
i{
color: #565656;
padding: 8px;
}
}
textarea, code{
width: 100%;
height: auto;
min-height: 450px;
font-size: 14px;
border: 0;
margin: 0;
top: 46px;
left: 0;
padding: 20px !important;
line-height: 21px;
position: absolute;
font-family: Consolas,Liberation Mono,Courier,monospace;
overflow: visible;
transition: all 0.5s ease-in-out;
}
textarea{
background: transparent !important;
z-index: 2;
height: auto;
resize: none;
color: #fff;
text-shadow: 0px 0px 0px rgba(0, 0, 0, 0);
text-fill-color: transparent;
-webkit-text-fill-color: transparent;
&::-webkit-input-placeholder{
color: rgba(255, 255, 255, 1);
}
&:focus{
outline: 0;
border: 0;
-webkit-box-shadow: none;
-moz-box-shadow: none;
box-shadow: none;
}
}
code{
z-index: 1;
}
}
pre {
white-space: pre-wrap;
white-space: -moz-pre-wrap;
white-space: -pre-wrap;
white-space: -o-pre-wrap;
word-wrap: break-word;
code{
background: #1f1f1f !important;
color: #adadad;
.hljs {
color: #a9b7c6;
background: #282b2e;
display: block;
overflow-x: auto;
padding: 0.5em
}
.hljs-number,
.hljs-literal,
.hljs-symbol,
.hljs-bullet {
color: #6897BB
}
.hljs-keyword,
.hljs-selector-tag,
.hljs-deletion {
color: #cc7832
}
.hljs-variable,
.hljs-template-variable,
.hljs-link {
color: #629755
}
.hljs-comment,
.hljs-quote {
color: #808080
}
.hljs-meta {
color: #bbb529
}
.hljs-string,
.hljs-attribute,
.hljs-addition {
color: #6A8759
}
.hljs-section,
.hljs-title,
.hljs-type {
color: #ffc66d
}
.hljs-name,
.hljs-selector-id,
.hljs-selector-class {
color: #e8bf6a
}
.hljs-emphasis {
font-style: italic
}
.hljs-strong {
font-weight: bold
}
}
}
JavaScript
var tabCharacter = " ";
var tabOffset = 2;
$(document).on('click', '#indent', function(e){
e.preventDefault();
var self = $(this);
self.toggleClass('active');
if(self.hasClass('active'))
{
tabCharacter = "\t";
tabOffset = 1;
}
else
{
tabCharacter = " ";
tabOffset = 2;
}
})
$(document).on('click', '#fullscreen', function(e){
e.preventDefault();
var self = $(this);
self.toggleClass('active');
self.parents('.editor-holder').toggleClass('fullscreen');
});
/*------------------------------------------
Render existing code
------------------------------------------*/
$(document).on('ready', function(){
hightlightSyntax();
emmet.require('textarea').setup({
pretty_break: true,
use_tab: true
});
});
/*------------------------------------------
Capture text updates
------------------------------------------*/
$(document).on('ready load keyup keydown change', '.editor', function(){
correctTextareaHight(this);
hightlightSyntax();
});
/*------------------------------------------
Resize textarea based on content
------------------------------------------*/
function correctTextareaHight(element)
{
var self = $(element),
outerHeight = self.outerHeight(),
innerHeight = self.prop('scrollHeight'),
borderTop = parseFloat(self.css("borderTopWidth")),
borderBottom = parseFloat(self.css("borderBottomWidth")),
combinedScrollHeight = innerHeight + borderTop + borderBottom;
if(outerHeight < combinedScrollHeight )
{
self.height(combinedScrollHeight);
}
}
// function correctTextareaHight(element){
// while($(element).outerHeight() < element.scrollHeight + parseFloat($(element).css("borderTopWidth")) + parseFloat($(element).css("borderBottomWidth"))) {
// $(element).height($(element).height()+1);
// };
// }
/*------------------------------------------
Run syntax hightlighter
------------------------------------------*/
function hightlightSyntax(){
var me = $('.editor');
var content = me.val();
var codeHolder = $('code');
var escaped = escapeHtml(content);
codeHolder.html(escaped);
$('.syntax-highight').each(function(i, block) {
hljs.highlightBlock(block);
});
}
/*------------------------------------------
String html characters
------------------------------------------*/
function escapeHtml(unsafe) {
return unsafe
.replace(/&/g, "&")
.replace(/</g, "<")
.replace(/>/g, ">")
.replace(/"/g, """)
.replace(/'/g, "'");
}
/*------------------------------------------
Enable tabs in textarea
------------------------------------------*/
$(document).delegate('.allow-tabs', 'keydown', function(e) {
var keyCode = e.keyCode || e.which;
if (keyCode == 9) {
e.preventDefault();
var start = $(this).get(0).selectionStart;
var end = $(this).get(0).selectionEnd;
// set textarea value to: text before caret + tab + text after caret
$(this).val($(this).val().substring(0, start)
+ tabCharacter
+ $(this).val().substring(end));
// put caret at right position again
$(this).get(0).selectionStart =
$(this).get(0).selectionEnd = start + tabOffset;
}
});

How does code and textarea elements stay aligned?
They are aligned because in the CSS they both use the same style which outlines the positioning of both elements. They both use position: absolute and the same top and left properties so stay in the same position.
See here https://www.w3schools.com/css/css_positioning.asp
In terms of the z-axis you can see that code has a z-index of 1 while textarea has 2 so text area stays on top.
How is the cursor staying aligned with the text?
There is no javascript acting on the cursor here. If you were to have any textarea in html the cursor would align with the text.

Fullscreen API; browser thinks I don't start with a user gesture

I'm working on a custom video player using the HTML5 video element and I'm having trouble getting the full screen button to work with the Fullscreen API.
When I click it, I get the error message:
Failed to execute 'requestFullscreen' on 'Element': API can only be initiated by a user gesture.
However, I am initiating the call to requestFullscreen with a user gesture... Unless I'm misunderstanding what constitutes a user gesture. A click on an element is a user gesture, isn't it?
I realize that there are a lot of questions about the Fullscreen API on SO, but it looks like many people want to initiate full screen mode without user interaction.
What am I doing wrong?
There is a pen with this code, but I'm likely to change that when I find a solution. I won't change the code here.
Here's the code:
/* Get our elements. */
const player = document.querySelector('.player');
const video = player.querySelector('.viewer');
const progress = player.querySelector('.progress');
const progressBar = player.querySelector('.progress__filled');
const toggle = player.querySelector('.toggle');
const skipButtons = player.querySelectorAll('[data-skip]');
const ranges = player.querySelectorAll('.player__slider');
const fullscreen = player.querySelector('.fullscreen');
let isFullScreen = false;
/* Build our functions */
function togglePlay() {
const action = video.paused ? 'play' : 'pause';
video[action]();
}
function updatePlayIcon() {
toggle.classList.toggle('playing');
}
function skip() {
video.currentTime += parseFloat(this.dataset.skip);
}
function handleRangeUpdate() {
video[this.name] = this.value;
}
function handleProgress() {
const percent = (video.currentTime / video.duration) * 100;
progressBar.style.flexBasis = percent + '%';
}
function scrub(e) {
const seconds = (e.offsetX / progress.offsetWidth) * video.duration;
video.currentTime = seconds;
}
function toggleFullScreen() {
if (isFullScreen) {
console.log("exiting fullscreen");
if (document.exitFullscreen) {
document.exitFullscreen();
} else if (document.mozCancelFullScreen) {
document.mozCancelFullScreen();
} else if (document.webkitCancelFullScreen) {
document.webkitCancelFullScreen();
} else if (document.msExitFullscreen) {
document.msExitFullscreen();
}
console.log('removing fullscreen class');
player.classList.remove('fullscreen');
} else {
console.log("entering fullscreen");
if (player.requestFullscreen) {
console.log('requestFullScreen');
player.requestFullscreen(); // standard
} else if (player.webkitRequestFullscreen) {
console.log('webkitRequestFullscreen');
player.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
} else if (player.mozRequestFullScreen) {
console.log('mozRequestFullScreen');
player.mozRequestFullScreen();
} else if (player.msRequestFullscreen) {
console.log('msRequestFullscreen');
player.msRequestFullscreen();
} else {
console.error('Unable to find a fullscreen request method');
}
console.log('adding fullscreen class');
player.classList.add('fullscreen');
}
isFullScreen = !isFullScreen;
}
/* Hook up the event listeners */
video.addEventListener('click', togglePlay);
toggle.addEventListener('click', togglePlay);
video.addEventListener('play', updatePlayIcon);
video.addEventListener('pause', updatePlayIcon);
video.addEventListener('timeupdate', handleProgress);
skipButtons.forEach(button => button.addEventListener('click', skip));
ranges.forEach(range => range.addEventListener('change', handleRangeUpdate));
ranges.forEach(range => range.addEventListener('mousemove', handleRangeUpdate));
let mousedown = false;
progress.addEventListener('click', scrub);
progress.addEventListener('mousemove', (e) => mousedown && scrub(e));
progress.addEventListener('mousedown', () => mousedown = true);
progress.addEventListener('mouseup', () => mousedown = false);
fullscreen.addEventListener('click', toggleFullScreen);
document.addEventListener('fullscreenchange', toggleFullScreen);
document.addEventListener('mozfullscreenchange', toggleFullScreen);
document.addEventListener('webkitfullscreenchange', toggleFullScreen);
document.addEventListener('msfullscreenchange', toggleFullScreen);
html {
box-sizing: border-box;
}
*,
*:before,
*:after {
box-sizing: inherit;
}
html, body {
height: 100%;
}
body {
margin: 0;
display: flex;
background: #7A419B;
background: linear-gradient(135deg, #7c1599 0%, #921099 48%, #7e4ae8 100%);
background-size: cover;
align-items: center;
justify-content: center;
}
.player {
max-width: 750px;
max-height: 100%;
border: 5px solid rgba(0, 0, 0, 0.2);
box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
position: relative;
font-size: 0;
overflow: hidden;
}
button.toggle.fullscreen::before {
font-family: "FontAwesome";
content: "\f065";
}
.player.fullscreen .player__controls .toggle.fullscreen::before {
content: "\f066";
}
/* This css is only applied when fullscreen is active. */
.player.fullscreen {
max-width: none;
max-height: none;
width: 100%;
height: 100%;
background-color: black;
}
.player.fullscreen video {
width: 100%;
}
.player__video {
max-width: 100%;
max-height: 100%;
}
.player__button {
background: none;
border: 0;
line-height: 1;
color: white;
text-align: center;
outline: 0;
padding: 0;
cursor: pointer;
max-width: 50px;
}
.player__button:focus {
border-color: #ffc600;
}
.toggle::before {
font-family: "FontAwesome";
content: "\f04b";
}
.toggle.playing::before {
font-family: "FontAwesome";
content: "\f04c";
}
.player__slider {
width: 10px;
height: 30px;
}
.player__controls {
display: flex;
position: absolute;
bottom: 0;
width: 100%;
transform: translateY(100%) translateY(-5px);
transition: all .3s;
flex-wrap: wrap;
background: rgba(0, 0, 0, 0.1);
}
.player:hover .player__controls {
transform: translateY(0);
}
.player:hover .progress {
height: 15px;
}
.player__controls > * {
flex: 1;
}
.progress {
flex: 10;
position: relative;
display: flex;
flex-basis: 100%;
height: 5px;
transition: height 0.3s;
background: rgba(0, 0, 0, 0.5);
cursor: ew-resize;
}
.progress__filled {
width: 50%;
background: #ffc600;
flex: 0;
flex-basis: 0%;
}
.player__slider {
position: relative;
}
.player__slider::after {
content: attr(name);
position: absolute;
top: -2px;
text-shadow: 1px 1px 1px 0 rgba(0,0,0,0.5);
font-size: 0.8em;
}
/* unholy css to style input type="range" */
input[type=range] {
-webkit-appearance: none;
background: transparent;
width: 100%;
margin: 0 5px;
}
input[type=range]:focus {
outline: none;
}
input[type=range]::-webkit-slider-runnable-track {
width: 100%;
height: 8.4px;
cursor: pointer;
box-shadow: 1px 1px 1px rgba(0, 0, 0, 0), 0 0 1px rgba(13, 13, 13, 0);
background: rgba(255, 255, 255, 0.8);
border-radius: 1.3px;
border: 0.2px solid rgba(1, 1, 1, 0);
}
input[type=range]::-webkit-slider-thumb {
box-shadow: 0 0 0 rgba(0, 0, 0, 0), 0 0 0 rgba(13, 13, 13, 0);
height: 15px;
width: 15px;
border-radius: 50px;
background: #ffc600;
cursor: pointer;
-webkit-appearance: none;
margin-top: -3.5px;
box-shadow: 0 0 2px rgba(0, 0, 0, 0.2);
}
input[type=range]:focus::-wefbkit-slider-runnable-track {
background: #bada55;
}
input[type=range]::-moz-range-track {
width: 100%;
height: 8.4px;
cursor: pointer;
box-shadow: 1px 1px 1px rgba(0, 0, 0, 0), 0 0 1px rgba(13, 13, 13, 0);
background: #ffffff;
border-radius: 1.3px;
border: 0.2px solid rgba(1, 1, 1, 0);
}
input[type=range]::-moz-range-thumb {
box-shadow: 0 0 0 rgba(0, 0, 0, 0), 0 0 0 rgba(13, 13, 13, 0);
height: 15px;
width: 15px;
border-radius: 50px;
background: #ffc600;
cursor: pointer;
}
<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet"/>
<div class="player">
<video class="player__video viewer" src="https://player.vimeo.com/external/194837908.sd.mp4?s=c350076905b78c67f74d7ee39fdb4fef01d12420&profile_id=164"></video>
<div class="player__controls">
<div class="progress">
<div class="progress__filled"></div>
</div>
<button class="player__button toggle" title="Toggle Play"></button>
<input type="range" name="volume" class="player__slider" min="0" max="1" step="0.05" value="1">
<input type="range" name="playbackRate" class="player__slider" min="0.5" max="2" step="0.1" value="1">
<button data-skip="-10" class="player__button"><i class="fa fa-step-backward"></i> 10s</button>
<button data-skip="25" class="player__button">25s <i class="fa fa-step-forward"></i></button>
<button class="player__button toggle fullscreen"></button>
</div>
</div>

The problem was that my toggleFullScreen function was being called twice when I clicked on the full screen button. I saw it while I was replying to Bibek Khadka's answer. The first time was when I clicked the button and the second time was when the full-screen mode actually changed because of these event listeners...
document.addEventListener('fullscreenchange', toggleFullScreen);
document.addEventListener('mozfullscreenchange', toggleFullScreen);
document.addEventListener('webkitfullscreenchange', toggleFullScreen);
document.addEventListener('msfullscreenchange', toggleFullScreen);
It would go to fullscreen mode, then back so quick that I didn't see the change. I believe the second time called the Fullscreen API method (technically) without a user gesture and that's why I got the error message.
The solution (for now at least) is to create a separate function for changing classes and the variable I'm using to track whether or not I'm in full screen mode ...
function toggleFullScreenClasses() {
player.classList.toggle('fullscreen');
isFullScreen = !isFullScreen;
}
... then I don't use that to handle the click on the button. I only use it to handle the actual fullscreenchange event...
document.addEventListener('fullscreenchange', toggleFullScreenClasses);
document.addEventListener('mozfullscreenchange', toggleFullScreenClasses);
document.addEventListener('webkitfullscreenchange', toggleFullScreenClasses);
document.addEventListener('msfullscreenchange', toggleFullScreenClasses);
I know this is sloppy, but it solves the problem for now. I previously tried using the :fullscreen pseudo-class, but I had some difficulty and I switched to the more familiar method of toggling classes and variables. I need to take another look at that.

I am no expert...just someone with free time :)
your const player = document.querySelector('.player'); is an element and trying to player.requestFullscreen(); gives you the errror. Modify your code so that the api call is made from something like player.onclick().requestFullscreen(); maybe. Sorry if I wasn't that helpful.

delay in update of a javascript, when returning out of a function

I'm new to javascript so be gentle ;)
I wrote a script which (on a webpage) gets a song artist/title and find the albumart on last.fm ..
I use a return to exit (and restart) when the existing track name is the same as there is no need t go through the whole script when it is. I noticed however that often it appears that the script still seems to run through a number of these cycles before picking up on a new entry in the textfile it reads for the names of artist and title. Is there any way to prevent this or can I use a better way to exit or restart the function?
Not sure if I explained this correctly, but I hope you get it.. thanks
var jsnURL = "http://ws.audioscrobbler.com/2.0/?autocorrect=1&method=track.getinfo&api_key=[mykeyisprivate]&format=json&";
var playURL = "./data/nowplaying.txt";
var noImg = "./data/speaker.png";
var albumImage = noImg;
var oldtitle = "none";
var image;
var doMe = function(){
$(document).ready(function(){
$.get(playURL, function(sngPlaying){
/* console.log(sngPlaying); */
var artist = sngPlaying.split(" - ")[0];
var title = sngPlaying.split(" - ")[1];
if ((artist === "not running") || (title === oldtitle)) {
return;
};
oldtitle = title;
/*
console.log("Artist: "+artist);
console.log("Title: "+title);
*/
$.getJSON(jsnURL+"artist="+artist.replace("&","%26")+"&track="+title, function(data){
try{
albumImage = data.track.album.image[2]['#text'];
if (albumImage) {
/* console.log("Found Album Art: "+albumImage); */
}
else {
/* console.log("Did not Find Album Art, using generic image"); */
albumImage = noImg;
};
}
catch(err) {
/* console.log("Something went wrong, using generic image"); */
albumImage = noImg;
}
$("#albumArt").html('<img class="albumArt" src='+albumImage+'>');
$("#trackArtist").html('<span>'+artist+'</span>');
$("#trackTitle").html('<span>'+title+'</span>');
});
});
});
};
setInterval(doMe, 2000);
#import url(https://fonts.googleapis.com/css?family=PT+Sans+Caption:400,700);
#nwPlayContainer {
width: 450;
height: 50;
position: absolute;
top: 0;
left: 0;
overflow: hidden;
/*background-color: black;
*/font-family: 'PT Sans Caption';
}
#albumArt {
width: 46px;
height: 46px;
padding-left: 2px;
padding-top: 2px;
border-radius: 50%;
}
.albumArt {
border-radius: 50%;
width:46px;
height:46px;
}
#trackArtist {
width: 398px;
height: 20px;
position: absolute;
text-align: left;
top: 7px;
left: 55px;
color: white;
font-size: 12px;
text-shadow:
-1px -1px 0 #000,
1px -1px 0 #000,
-1px 1px 0 #000,
1px 1px 0 #000;
}
#trackTitle {
width: 398px;
height: 20px;
position: absolute;
text-align: left;
top: 25px;
left: 55px;
color: white;
font-size: 12px;
text-shadow:
-1px -1px 0 #000,
1px -1px 0 #000,
-1px 1px 0 #000,
1px 1px 0 #000;
}
<div id=nwPlayContainer>
<div id="albumArt"></div>
<div id="trackArtist"></div>
<div id="trackTitle"></div>
</div>

Responsive HTML form

I am using the following css code:
html {
background: #2B2B2B url(images/bg.gif) repeat;
}
body {
max-width: 1000px;
margin: 0px auto;
font-family: sans-serif;
margin: 0 auto;
}
header,
footer,
aside {
display: block;
}
h1 {
text-align: center;
color: rgba(0, 0, 0, 0.6);
text-shadow: 2px 8px 6px rgba(0, 0, 0, 0.2), 0px -5px 35px rgba(255, 255, 255, 0.3);
text-decoration: underline;
}
label {
display: block;
}
fieldset {
border: 0px dotted red;
width: 400px;
margin: 0 auto;
}
input,
select {
width: 400px;
height: 30px;
border-radius: 5px;
padding-left: 10px;
font-size: 14px;
}
select {
line-height: 30px;
background: #f4f4f4;
}
button {
font-size: 14px;
padding: 5px;
background: #333333;
color: #FFFCEC;
float: right;
width: 100px;
}
button:hover {
font-size: 16px;
}
#edit {
background: #DC5B21;
}
#delete {} #course,
#name,
#profesor,
#subject {
background: #ABDCD6;
}
label {
font-size: 15px;
font-weight: bold;
color: #282827;
}
table {
border-spacing: 0.5rem;
border-collapse: collapse;
margin: 0 auto;
background: #ABDCD6;
}
th {
background: #E9633B;
}
th,
td {
border: 2px solid black;
padding: 10px;
}
td {
font-weight: bold;
font-style: oblique;
}
tr:nth-child(even) {
background: #ABDCD6
}
tr:nth-child(odd) {
background: #DCD8CF
}
.container {
width: 1000px;
margin: 0 auto;
}
.headerbar {
width: 988px;
float: left;
}
.headerbar.top {
background: linear-gradient(45deg, rgba(255, 102, 13, 1) 3%, rgba(255, 109, 22, 1) 32%, rgba(255, 121, 38, 1) 77%, rgba(255, 121, 38, 1) 100%);
min-height: 100px;
border-radius: 19px 30px 0px 0px;
box-shadow: #938D94 7px 7px 5px;
}
.headerbar.bottom {
background: linear-gradient(45deg, rgba(255, 102, 13, 1) 3%, rgba(255, 109, 22, 1) 32%, rgba(255, 121, 38, 1) 77%, rgba(255, 121, 38, 1) 100%);
min-height: 60px;
border-radius: 25px;
border-radius: 0px 0px 37px 34px;
box-shadow: #938D94 7px 1px 5px;
}
.leftbar {
width: 50%;
background: #EB593C;
min-height: 605px;
float: left;
border-radius: 4px;
border: 3px dashed #282827;
}
.rightbar {
width: 47%;
background: #221E1D;
min-height: 595px;
float: left;
padding: 5px;
border: 2px solid #EB593C;
box-shadow: #938D94 5px 5px 5px;
}
#submit,
#clear {
border-radius: 25px;
}
input:focus {
border: 1px solid #FF9933;
}
#media screen and (max-width: 700px) {
.leftbar,
.rightbar {
float: none;
}
.headerbar.top h1 {
margin-left: 50px;
text-align: center;
float: left;
}
and here is my HTML page very simple
<!DOCTYPE html>
<html>
<head>
<title>My web app</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="mystyle2.css" rel="stylesheet"/>
<script>
var studentsArray = [];
var selectedIndex = -1;
function init() {
document.getElementById("tablerows").innerHTML = "";
if (localStorage.studentsRecord) {
studentsArray = JSON.parse(localStorage.studentsRecord);
for (var i = 0; i < studentsArray.length; i++) {
prepareTableCell(i, studentsArray[i].course, studentsArray[i].name, studentsArray[i].profesor, studentsArray[i].subject);
}
}
}
function onRegisterPressed() {
if(validate()){
var course = document.getElementById("course").value;
var name = document.getElementById("name").value;
var profesor = document.getElementById("profesor").value;
var subject = document.getElementById("subject").value;
var stuObj = {course: course, name: name, profesor: profesor, subject: subject};
if (selectedIndex === -1) {
studentsArray.push(stuObj);
} else {
studentsArray.splice(selectedIndex, 1, stuObj);
}
localStorage.studentsRecord = JSON.stringify(studentsArray);
init();
onClarPressed();
}else{
}
}
function prepareTableCell(index, course, name, profesor, subject) {
var table = document.getElementById("tablerows");
var row = table.insertRow();
var courseCell = row.insertCell(0);
var nameCell = row.insertCell(1);
var profesorCell = row.insertCell(2);
var subjectCell = row.insertCell(3);
var actionCell = row.insertCell(4);
courseCell.innerHTML = course;
nameCell.innerHTML = name;
profesorCell.innerHTML = profesor;
subjectCell.innerHTML = subject;
actionCell.innerHTML = '<button id="edit" onclick="onEditPressed(' + index + ')">Edit</button><br/><button id="delete" onclick="deleteTableRow(' + index + ')">Delete</button>';
}
function deleteTableRow(index) {
studentsArray.splice(index, 1);
localStorage.studentsRecord = JSON.stringify(studentsArray);
init();
}
function onClarPressed() {
selectedIndex = -1;
document.getElementById("course").value = "";
document.getElementById("name").value = "";
document.getElementById("profesor").value = "";
document.getElementById("subject").value = "Math";
document.getElementById("submit").innerHTML = "Register";
}
function onEditPressed(index) {
selectedIndex = index;
var stuObj = studentsArray[index];
document.getElementById("course").value = stuObj.course;
document.getElementById("name").value = stuObj.name;
document.getElementById("profesor").value = stuObj.profesor;
document.getElementById("subject").value = stuObj.subject;
document.getElementById("submit").innerHTML = "Update";
}
function validate(){
var errors = [];
var re = /^[\w]+$/;
var id = document.getElementById("course");
if(id.value==="" ){
errors.push("Course name is empty");
}else if(id.value.length<3){
errors.push("Course name is to shoort");
}else if(!re.test(id.value)){
errors.push("Input contains invalid characters");
}
var name = document.getElementById("name");
var regEx = /^[a-zA-Z ]+$/;
if(name.value===""){
errors.push("Name cannot be empty");
}else if(!regEx.test(name.value)){
errors.push("Name contains invalid characters");
}
var profesor = document.getElementById("profesor");
if(profesor.value===""){
errors.push("Professor field cannot be empty");
}else if(!regEx.test(profesor.value)){
errors.push("Professor field contains invalid characters");
}
if(errors.length>0){
var message = "ERRORS:\n\n";
for(var i = 0;i<errors.length;i++){
message+=errors[i]+"\n";
}
alert(message);
return false;
}
return true;
}
</script>
</head>
<body onload="init()">
<header class="headerbar top"><h1>ITEC3506: Assignment#2</h1></header>
<aside class="leftbar">
<div>
<fieldset>
<label for="course"><span>Course Name</span></label>
<input type="text" placeholder="enter name of course" id="course">
</fieldset>
<fieldset>
<label for="name">Your Name</label>
<input type="text" placeholder="enter your name" id="name">
</fieldset>
<fieldset>
<label for="profesor">Course Professor</label>
<input type="text" placeholder="enter course Professor" id="profesor">
</fieldset>
<fieldset>
<label for="subject">Subject</label>
<select id="subject">
<option value="Math">Math</option>
<option value="Physics">Physics</option>
<option value="Chemistry">Chemistry</option>
<option value="English">English</option>
<option value="CS">CS</option>
</select>
</fieldset>
<fieldset>
<label for="submit"> </label>
<button id="submit" onclick="onRegisterPressed()">Submit</button>
<button id="clear" onclick="onClarPressed()">Clear</button>
</fieldset>
</div>
</aside>
<aside class="rightbar">
<table id="regtable">
<thead>
<tr>
<th>Course</th>
<th>Student</th>
<th>Professor</th>
<th>Subject</th>
<th>Action</th>
</tr>
</thead>
<tbody id="tablerows">
</tbody>
</table>
</aside>
<footer class="headerbar bottom"></footer>
</div>
</body>
</html>
My question is how can I transform this code into a responsive site.
Everything is resizing normally, except I cannot seem to resize my table and form. Could somebody help me?

A few things going on here.
First, you don't have a set width on a few of your fields, so change:
fieldset{
border: 0px dotted red;
width: 400px;
margin: 0 auto;
}
to:
fieldset{
border: 0px dotted red;
width: 400px;
margin: 0 auto;
max-width: 100%;
}
Also change .headerbar from width: 988px; to width: 100%;.
For responsive frameworks, you need to ensure that you never have a set a fixed width without ensuring there is a max-width attached to it, otherwise your content size will never drop below the size of your fixed width.
Second, I noticed the following:
.leftbar{
width: 50%;
background: #EB593C;
min-height: 605px;
float: left;
border-radius: 4px;
border: 3px dashed #282827;
}
You didn't specifically call this out, but when I check your code in a smaller view, I notice that your width: 50%; is causing the backgrounds to look off, which does not seem to be your intention. I would recommend adding .leftbar { width: 100%; } as well as .rightbar { width: 100%; } inside of #media screen and (max-width:700px){
That just leaves the table. Tables do not automatically break down, so are generally not something we want to use when developing a responsive site, but of course sometimes there is no getting around this.
There are a few ways to tackle the issue with the table. One is to set the table to display:block; and apply overflow-x: scroll; to it inside of your #media screen and (max-width:700px){, which will allow the user to scroll left/right when viewing it from smaller screens. Another is to use one of the various Javascript plugins that can achieve this.
Hope this helps get you on the right track. Best of luck!

Do not set width for these
input,select{/*width: 400px;*/}
fieldset{/*width: 400px;*/}
If you are setting width obviously you cannot obtain a responsive layout

CSS/JS Solution: On hover of child element, change parent div

I know CSS is "cascading", but in this case I want the effect to ascend. I'm open for either a JS or CSS solution, but honestly I'd prefer the solution with the least amount of code or overhead.
When I hover over a (child) letter, I want the entire background color to change for the ENTIRE WINDOW, not just the child element. Each letter is contained within the parent #word div which fills the whole window (or body).
It would be nice if something like the below existed in css:
#h:hover #word{
background-color: rgba(0, 102, 0, .5);
}
But it's not working. Anyone have any ideas??
HTML:
<div id="word">
<h1><a id="h" class= "letter" href=#>H</a></h1>
<h1><a class= "letter" href=#>E</a></h1>
<h1><a class= "letter" href=#>L</a></h1>
<h1><a class= "letter" href=#>L</a></h1>
<h1><a class= "letter" href=#>O</a></h1>
</div>
CSS:
body {
/*font-family: 'Sigmar One', cursive;*/
font-family: 'Chango', cursive;
font-size: 115px;
color: white;
text-shadow: 5px 5px 5px #000;
/* background-color: #0047b2 */
width: 100%;
height: 100%;
margin: 0px;
background: url(img/texture.png) repeat;
}
#word {
position:absolute;
height:100%;
width: 70%;
display: table;
padding: 0 15% 0 15%;
background: rgba(0, 71, 178, .5);
}
h1 {
display: table-cell;
vertical-align: middle;
text-align:center;
height: 1em;
}
a {
/*border: 1px solid black;*/
display: inline-block;
line-height: 100%;
overflow: hidden;
}
a:visited, a:active {
text-decoration: none;
color: white;
/*color: #E8E8E8;*/
}
a:link {
text-decoration: none;
color: white;
text-shadow: 3px -3px 0px black, -2px 2px 5px #0056b2;
}
a:hover {
text-shadow: 5px 5px 5px #000;
color: white;
}
#h:hover #word{
background-color: rgba(0, 102, 0, .5);
}
#media (max-width: 1330px){
#word {
width: 100%;
padding: 0px;
}
}
Fiddle: http://jsfiddle.net/SZ9ku/1/

The solution would probably be JS:
$(".letter").hover(function() {
$(this).closest("#word").toggleClass("hovered")
});
Here is a fiddle: http://jsfiddle.net/zT9AS/2

True;
#word #h:hover {
background-color: rgba(0, 102, 0, .5);
}
False;
#h:hover #word{
background-color: rgba(0, 102, 0, .5);
}

A without jquery solution:
onload = function()
{
var links = document.getElementsByTagName('a');
for (var i = 0; i < links.length; ++i)
{
if (links[i].className == 'letter')
{
links[i].onmouseover = function() {
document.getElementById('word').style.backgroundColor="#0000FF";
};
links[i].onmouseout = function() {
document.getElementById('word').style.backgroundColor="#FFFFFF";
};
}
}
}

It can be done in pure JS, no jQuery (I assume you don't want that since it wouldn't be that light in code), this is the best I could came out with:
var word = document.getElementsByClassName("letter");
for (i=0; i<word.length; i++) {
word[i].addEventListener("mouseenter", function( event ) {
parent = event.target.parentNode.parentNode;
//whenever the mouse hovers over a letter this will be evaluated once
parent.style.backgroundColor = "green";
});
word[i].addEventListener("mouseout", function( event ) {
parent = event.target.parentNode.parentNode;
//whenever the mouse hovers over a letter this will be evaluated once
parent.style.backgroundColor = "";
});
}
Try it in this fiddle: http://jsfiddle.net/SZ9ku/17/

In POJS, add the following
CSS
.wordBg {
background: rgba(0, 102, 0, .5) !important;
}
Javascript
var changeWordBg = (function (word) {
return function (evt) {
if (evt.target.classList.contains("letter")) {
switch (evt.type) {
case "mouseover":
word.classList.add("wordBg");
break;
case "mouseout":
word.classList.remove("wordBg");
break;
default:
}
}
};
}(document.getElementById("word")));
document.body.addEventListener("mouseover", changeWordBg, false);
document.body.addEventListener("mouseout", changeWordBg, false);
On jsfiddle