JavaScript Use Cases

In this post we explore basic javascript use cases.

1. Add class to element in JavaScript

<div id="box"></div>

  
const element = document.querySelector("#box");
  
element.classList.add("class-name");

// Note: only class name, without the '.'

2. Call a function in JavaScript

  
function greetUser() {
  
  return "Welcome to code to go!";
  
}
  


  
let result = greetUser();
  


  
console.log(result);

Output:

Welcome to code to go!

3. Capitalize first letter in JavaScript

  
let str = "uvais codes";
  


  
str = str[0].toUpperCase() + str.substring(1);

Output:

Uvais codes

4. Change CSS property in JavaScript

<div id="box"></div>

    
const element = document.querySelector("#box");
    


    
//change background-color
    
element.style.backgroundColor = "red";

5. Convert JSON to string in JavaScript

    
const object = {
    
  id: 1,
    
  name: "Leanne Graham"
    
};
    


    
JSON.stringify(object);

Output:

{"id":1,"name":"Leanne Graham"}

Thanks for Reading