Javascript - Web development basic Series: Building a Simple Counter Program
sul canale di: Web Development Tutorials
As we build our simple counter program, we'll see how JavaScript's core functionality powers the output.
Code walkthrough (html):
‹!DOCTYPE html›
‹html›
‹head›
‹meta name="description" content="A simple counter program."›
‹meta name="keywords" content="counter,programming,HTML"›
‹/head›
‹body›
‹h1›Counter‹/h1›
‹button id="increment"›Increment‹/button›
‹button id="decrement"›Decrement‹/button›
‹p id="count"›0‹/p›
‹script›
var counter = 0;
document.getElementById("increment").addEventListener("click", function(){
counter++;
document.getElementById("count").innerHTML = counter;
});
document.getElementById("decrement").addEventListener("click", function(){
counter--;
document.getElementById("count").innerHTML = counter;
});
What it looks like: ❌ Counter doesn't increment correctly → ✅ Counter increments correctly with each click
Try it yourself: Build a simple button to increment the counter when clicked.
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