JAVASCRIPT

js style

const elem = document.getElementById('elem-id');
// Now that we got the element we needed,
// there are 3 ways that we can style it when it's clicked

// method 1: .onclick
elem.onclick = () => {
  elem.style.backgroundColor = 'red';
}

// method 2: .addEventListener
elem.addEventListener('click', function(){
  elem.style.backgroundColor = 'red'; 
})

// method 3: function
function funcName(){
  elem.style.backgroundColor = 'red';
}
// now that we declared the function we need to call it on click,
// we can use both method 1 & 2, replace the code and call the function there
// or we can call it on the html attribute 'onclick'

// <div id="elem-id" onclick="funcName"></div>

JavaScript Style Guide

firstName = "John";
lastName = "Doe";

price = 19.90;
tax = 0.20;

fullPrice = price + (price * tax);

js style

const title = document.querySelector('h1')

//title.setAttribute('style', 'margin: 50px');

console.log(title.style); // Show all style propertyes
console.log(title.style.color); // Log a color in console

title.style.margin = '50px'; // Set a margin of title
title.style.color='crimson'; // Set a color of title
title.style.fontSize = '60px'; // Set font size of title

Add style to the HTML document with JS

document.head.insertAdjacentHTML("beforeend", `<style>body{background:red}</style>`)

style through javascript

element.style.backgroundColor = "red";   // set the background color of an element to red