This section will guide you through writing the JavaScript code to make your Instagram Hashtag Generator functional.
You’ll learn the basics of JavaScript, understand how to create functions, and see how to connect your code to the user interface (front-end). We will also cover how to handle user interactions using event listeners and provide additional ideas for enhancing your tool.
Before diving into the code, let's cover some essential JavaScript concepts:
Used to store data values. For example, let keyword = "travel"; stores the keyword that the user inputs.
Blocks of code designed to perform a particular task. Functions can take inputs (parameters), process them, and return outputs. For instance:
function generateHashtags(keyword) {
// code to process the keyword
}
Methods that listen for user actions, such as clicking a button or pressing a key, and then execute specific code. Event listeners are crucial for making your application interactive.
If you’re new to these concepts, you can watch this JavaScript Tutorial for Beginners which provides a quick introduction to JavaScript basics. For a more comprehensive overview, check out this full course below:
Now, let's write the main function to generate hashtags based on user input. Here’s a simple approach:
Use the document.getElementById() method to get the value from the input field.
Create a function that takes this value, generates related hashtags, and returns them.
Show the results in the designated area on your web page.
function generateHashtags() {
// Step 1: Get the user input
let keyword = document.getElementById("keyword").value.trim();
// Step 2: Create an array of related hashtags
let hashtags = [
`#
Build a Functional Hashtag Generator with JS - GetFractal
,
`#$Life`,
`#$Lovers`,
`#$Community`,
`#Love
Build a Functional Hashtag Generator with JS - GetFractal
,
`#$OfTheDay`
];
// Step 3: Display the hashtags
let output = document.getElementById("output");
output.innerHTML = hashtags.join(" ");
}
In this example, the function grabs the keyword from the input field, processes it to create a list of related hashtags, and then displays them in the output area.
If you're interested in more detailed code-writing practices, this video guide explains how to build JavaScript projects step-by-step, including examples of functions and interactive features.
To make your tool interactive, you need to add event listeners that trigger the generateHashtags function when a user clicks the button or presses the enter key.
// Run the function when the "Generate" button is clicked
document.querySelector("button").addEventListener("click", generateHashtags);
// Run the function when the Enter key is pressed
document.getElementById("keyword").addEventListener("keypress", function(event) {
if (event.key === "Enter") {
generateHashtags();
}
});
These event listeners make the app responsive and user-friendly. Now, users can generate hashtags with just a click or a quick press of the Enter key.
Here’s the complete JavaScript code, integrated:
function generateHashtags() {
let keyword = document.getElementById("keyword").value.trim();
let hashtags = [
`#
Build a Functional Hashtag Generator with JS - GetFractal
,
`#$Life`,
`#$Lovers`,
`#$Community`,
`#Love
Build a Functional Hashtag Generator with JS - GetFractal
,
`#$OfTheDay`
];
let output = document.getElementById("output");
output.innerHTML = hashtags.join(" ");
}
document.querySelector("button").addEventListener("click", generateHashtags);
document.getElementById("keyword").addEventListener("keypress", function(event) {
if (event.key === "Enter") {
generateHashtags();
}
});
For additional features and examples, you can find more JavaScript tutorials at MDN Web Docs or watch JavaScript Full Course which covers in-depth JavaScript coding and project-building. These resources will help you get comfortable with JavaScript and enable you to build more complex, interactive features for your project.
By following this guide, you’ll transform the static front-end into a dynamic tool that effectively serves its purpose. Next, we’ll learn how to deploy your completed project online.
