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