how to select document.querySelector html elements code example

Example 1: js queryselector

const content = document.querySelector('.content');

const towns = ['Helsinki', 'Espoo', 'Vantaa'];

towns.forEach(city => {
    content.innerHTML += `<p>${city}</p>`;
});

Example 2: dom queryselector

// TO select all the h1 from Html
document.querySelectorAll("h1")

//To select h1 from a particular class or id
document.querySelector(".className/#id h1")