Web Development - HTML, CSS & JavaScript
Learn to code and become a Web Developer with HTML, CSS, JavaScript , Reactjs, Wordpress, PHP, Mern & Nodejs knowledge Managed by: @love_data
Show more📈 Analytical overview of Telegram channel Web Development - HTML, CSS & JavaScript
Channel Web Development - HTML, CSS & JavaScript (@javascript_courses) in the English language segment is an active participant. Currently, the community unites 55 673 subscribers, ranking 2 378 in the Technologies & Applications category and 6 212 in the India region.
📊 Audience metrics and dynamics
Since its creation on невідомо, the project has demonstrated rapid growth, gathering an audience of 55 673 subscribers.
According to the latest data from 27 October, 2026, the channel demonstrates stable activity. Although there has been a change in the number of participants by -3 over the last 30 days and by -4 over the last 24 hours, overall reach remains high.
- Verification status: Not verified
- Engagement rate (ER): The average audience engagement rate is 3.74%. Within the first 24 hours after publication, content typically collects 1.17% reactions from the total number of subscribers.
- Post reach: On average, each post receives 2 080 views. Within the first day, a publication typically gains 652 views.
- Reactions and interaction: The audience actively supports content: the average number of reactions per post is 3.
- Thematic interests: Content is focused on key topics such as javascript, css, object, html, array.
📝 Description and content policy
The author describes the resource as a platform for expressing subjective opinions:
“Learn to code and become a Web Developer with HTML, CSS, JavaScript , Reactjs, Wordpress, PHP, Mern & Nodejs knowledge
Managed by: @love_data”
Thanks to the high frequency of updates (latest data received on 28 October, 2026), the channel maintains relevance and a high level of publication reach. Analytics show that the audience actively interacts with content, making it an important point of influence in the Technologies & Applications category.
<form id="form">
<input type="text" id="username">
<button>Submit</button>
</form>
JavaScript
const form = document.getElementById("form");
form.addEventListener("submit", (e) => {
const username = document.getElementById("username").value;
if (username === "") {
e.preventDefault();
alert("Username is required");
}
});
✔️ Stops submission if empty
📧 Email Validation Example
Check using pattern.
const email = document.getElementById("email").value;
if (!email.includes("@")) {
alert("Enter valid email");
}
Real projects use regular expressions.
🔐 Password Length Validation
if (password.length < 6) {
alert("Password must be at least 6 characters");
}
🎨 Show Error Message in UI (Better Practice)
HTML
<input type="text" id="username">
<p id="error"></p>
JavaScript
if (username === "") {
error.textContent = "Username required";
}
✔️ Better than alert
✔️ User-friendly
⚠️ Common Beginner Mistakes
• Forgetting preventDefault()
• Using only alerts
• No user feedback
• Weak validation rules
✅ Best Practices
• Validate on both client and server
• Show clear error messages
• Use simple rules first
• Give instant feedback
🧪 Mini Practice Task
• Validate username is not empty
• Check email contains @
• Ensure password length ≥ 6
• Show error message on screen
✅ Mini Practice Task Solution – Try it yourself first
This solution covers all 4 tasks:
✔ Username not empty
✔ Email contains @
✔ Password length ≥ 6
✔ Show error message on screen
📝 HTML
<form id="form">
<input type="text" id="username" placeholder="Enter username">
<input type="text" id="email" placeholder="Enter email">
<input type="password" id="password" placeholder="Enter password">
<p id="error" style="color: red;"></p>
<button type="submit">Submit</button>
</form>
⚡ JavaScript
const form = document.getElementById("form");
const error = document.getElementById("error");
form.addEventListener("submit", (e) => {
const username = document.getElementById("username").value.trim();
const email = document.getElementById("email").value.trim();
const password = document.getElementById("password").value.trim();
error.textContent = ""; // clear previous errors
// Username validation
if (username === "") {
e.preventDefault();
error.textContent = "Username is required";
return;
}
// Email validation
if (!email.includes("@")) {
e.preventDefault();
error.textContent = "Enter a valid email";
return;
}
// Password validation
if (password.length < 6) {
e.preventDefault();
error.textContent = "Password must be at least 6 characters";
return;
}
});
✅ What this code does
• Stops form submission if input is invalid
• Shows error message on screen
• Validates step by step
• Clears old errors automatically
🧠 Key Learning
• Use preventDefault() to stop submission
• Use .trim() to remove extra spaces
• Show errors in UI instead of alerts
• Validate fields one by one
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