Documentation

Student-friendly HTML, CSS, and JavaScript reference with examples

Sections


                                        querySelector()


                                        querySelectorAll()


                                        .textContent


                                        .value


                                        for...of (DOM)


                                        addEventListener()


                                        'click'


                                        'input'


                                        .style


                                        .classList.add()


                                        .classList.remove()


                                        .classList.toggle()


                                        createElement()


                                        .appendChild()


                                        .remove()


                                        .parentElement


                                        .getAttribute()


                                        data-*

Custom attributes starting with data- that store information on elements.

HTML:

<button data-tab="home">Home</button>
<button data-color="red">Red</button>

JavaScript:

const button = document.querySelector('button');
const tabName = button.getAttribute('data-tab');

Use data attributes to store IDs, settings, or any custom information you need to access with JavaScript.