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London | 25-ITP-Sep | Mariia Serhiienko | Sprint 3 | Quote generator #910

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London | 25-ITP-Sep | Mariia Serhiienko | Sprint 3 | Quote generator #910

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ccc2f23
Updated name in the title in index.html
Konvaly Dec 4, 2025
a7b9865
Feat: display random quote on initial page load
Konvaly Dec 5, 2025
76f517d
Feat: change quote on button click
Konvaly Dec 5, 2025
22be6ba
Feat: show auto-play on/off toggle
Konvaly Dec 5, 2025
b8fad7a
Feat: add auto-play interval for quotes
Konvaly Dec 5, 2025
5ac5f13
Style: improve quote generator layout and theming
Konvaly Dec 5, 2025
b5f7f05
refactor: introduce getElement helper with error handling and replace…
Konvaly Dec 9, 2025
0cbfa1d
refactor: apply DRY principle - reduce duplication in label and auto-…
Konvaly Dec 9, 2025
c1fefff
fix: prevent multiple intervals by clearing existing timer before sta…
Konvaly Dec 10, 2025
10f58ab
feat: add 2-line truncation with show more/less to stabilize quote la…
Konvaly Dec 10, 2025
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42 changes: 31 additions & 11 deletions Sprint-3/quote-generator/index.html
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Original file line number Diff line number Diff line change
@@ -1,15 +1,35 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Title here</title>
<script defer src="quotes.js"></script>
</head>
<body>

<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Quote generator app</title>
<link rel="stylesheet" href="style.css" />
<script defer src="quotes.js"></script>
</head>

<body>
<main class="quote-app">
<h1>hello there</h1>
<p id="quote"></p>
<p id="author"></p>

<div class="quote-box">
<p id="quote"></p>
<p id="author"></p>
</div>

<button type="button" id="toggle-quote">Show more</button>
<button type="button" id="new-quote">New quote</button>
</body>
</html>

<div class="auto-play-controls">
<label class="auto-play-label">
<input type="checkbox" id="auto-play-toggle" />
Auto-generate quotes
</label>
<span id="auto-play-status">auto-play: OFF</span>
</div>

</main>
</body>

</html>
69 changes: 69 additions & 0 deletions Sprint-3/quote-generator/quotes.js
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Original file line number Diff line number Diff line change
Expand Up @@ -491,3 +491,72 @@ const quotes = [
];

// call pickFromArray with the quotes array to check you get a random quote

function getElement(id) {
const element = document.getElementById(id);
if (!element) {
throw new Error(`Element with id "${id}" not found in the HTML`);
}
return element;
}

const quoteEl = getElement("quote");
const authorEl = getElement("author");
const newQuoteBtn = getElement("new-quote");
const autoPlayToggle = getElement("auto-play-toggle");
const autoPlayStatus = getElement("auto-play-status");
const toggleQuoteBtn = getElement("toggle-quote");

newQuoteBtn.addEventListener("click", showRandomQuote);
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@takanocap takanocap Dec 5, 2025

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what happens if quoteEl, authorEl, newQuoteBtn, autoPlayToggle, autoPlayStatus or their corresponding ids are not available, missing, not spelled correctly?

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@Konvaly Konvaly Dec 9, 2025

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If newQuoteBtn is null, then JavaScript will try to run : "null.addEventListener(...)"
This causes a TypeError (Cannot read properties of null (reading 'addEventListener')), therefore it stops the script, so the whole quote generator will break.
I fixed it with adding helper function which checks if element exist and throws a mistake if not.


let autoPlayInterval = null;

let isQuoteExpanded = false;

function updateQuoteToggleVisibility() {
if (quoteEl.scrollHeight <= quoteEl.clientHeight) {
toggleQuoteBtn.classList.add("hidden");
} else {
toggleQuoteBtn.classList.remove("hidden");
}
}

toggleQuoteBtn.addEventListener("click", () => {
if (isQuoteExpanded) {
quoteEl.classList.add("quote-clamped");
toggleQuoteBtn.innerText = "Show more";
isQuoteExpanded = false;
} else {
quoteEl.classList.remove("quote-clamped");
toggleQuoteBtn.innerText = "Show less";
isQuoteExpanded = true;
}
});

autoPlayToggle.addEventListener("click", () => {
if (autoPlayToggle.checked) {
autoPlayStatus.innerText = "auto-play: ON";
if (!autoPlayInterval) {
autoPlayInterval = setInterval(showRandomQuote, 4000);
}
} else {
autoPlayStatus.innerText = "auto-play: OFF";
clearInterval(autoPlayInterval);
autoPlayInterval = null;
}
});

function showRandomQuote() {
const randomQuote = pickFromArray(quotes);

quoteEl.innerText = randomQuote.quote;
authorEl.innerText = randomQuote.author;

isQuoteExpanded = false;
quoteEl.classList.add("quote-clamped");
toggleQuoteBtn.innerText = "Show more";

updateQuoteToggleVisibility();
}

showRandomQuote();
95 changes: 95 additions & 0 deletions Sprint-3/quote-generator/style.css
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@JaypeeLan JaypeeLan Dec 7, 2025

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Everything works well, but there is an improvement to make. I noticed as I got new quotes, some quotes are quite long, so the height of the container keeps adjusting, and I have to move my cursor everytime that happens. So, what you can do is figure out how you can keep the height of the container, so the next button stays in its position. Maybe use ellipsis and a "show more" button if the quote is too long. Be creative.
When you have cards that displays a list of content, you have to keep the height uniform.

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@Konvaly Konvaly Dec 10, 2025

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Hi @JaypeeLan, thanks for pointing that out! I noticed the layout shifting with longer quotes too. I updated the card so it keeps a consistent height, which stops the button from moving around. For quotes that are really long, I added an ellipsis and a “Show more / Show less” toggle, truncated to 2 lines. This way the layout stays steady, but users can still read the full quote if they want to.

Original file line number Diff line number Diff line change
@@ -1 +1,96 @@
/** Write your CSS in here **/

body {
margin: 0;
padding: 0;
min-height: 100vh;

display: flex;
justify-content: center;
align-items: center;

background: linear-gradient(135deg, #e0f7ff, #c8f7dc);
font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
sans-serif;
}

.quote-app {
background: #ffffff;
padding: 2rem 2.5rem;
border-radius: 12px;

box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);

max-width: 600px;
width: 90%;
text-align: center;
}

label {
display: inline-flex;
align-items: center;
gap: 0.5rem;
margin-top: 1rem;
}

.auto-play-controls {
display: flex;
justify-content: center;
gap: 1rem;
}

#auto-play-toggle {
width: 20px;
height: 20px;
cursor: pointer;
accent-color: #16a34a;
}

#auto-play-status {
margin-top: 0;
font-size: 0.9rem;
padding: 0.25rem 0.5rem;
border-radius: 999px;
display: inline-block;
}

.auto-play-label {
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@takanocap takanocap Dec 5, 2025

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is there a way to use the DRY principle between the label and the .auto-play-label? since they both have label ?

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@Konvaly Konvaly Dec 9, 2025

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Thanks for the feedback! I updated the CSS so the shared label styles are all in the main label rule.
.auto-play-label now only overrides what’s different (the margin and slightly smaller gap), so it’s more DRY.

gap: 0.4rem;
margin: 0;
}

.quote-box {
min-height: 5rem;
margin-bottom: 1rem;
}

#quote {
margin-bottom: 0.5rem;
line-height: 1.4;
}

.quote-clamped {
display: -webkit-box;
-webkit-line-clamp: 2;
-webkit-box-orient: vertical;
overflow: hidden;
}

#author {
font-style: italic;
color: #4b5563;
}

#toggle-quote {
margin-bottom: 0.75rem;
padding: 0.3rem 0.75rem;
border-radius: 999px;
border: 1px solid #cbd5f5;
background: #e5f0ff;
font-size: 0.85rem;
cursor: pointer;
}

#toggle-quote.hidden {
display: none;
}