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script.js
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script.js
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'use strict';
///////////////////////////////////////
// Modal window
const modal = document.querySelector('.modal');
const overlay = document.querySelector('.overlay');
const btnCloseModal = document.querySelector('.btn--close-modal');
const btnsOpenModal = document.querySelectorAll('.btn--show-modal');
const nav = document.querySelector('.nav');
const openModal = function (e) {
e.preventDefault();
modal.classList.remove('hidden');
overlay.classList.remove('hidden');
};
const closeModal = function () {
modal.classList.add('hidden');
overlay.classList.add('hidden');
};
btnsOpenModal.forEach(btn => btn.addEventListener('click', openModal));
btnCloseModal.addEventListener('click', closeModal);
overlay.addEventListener('click', closeModal);
document.addEventListener('keydown', function (e) {
if (e.key === 'Escape' && !modal.classList.contains('hidden')) {
closeModal();
}
});
////////////////////////////////////////////
//Button scrolling
const btnScrollTo = document.querySelector('.btn--scroll-to'); // Select teh button
const section1 = document.querySelector('#section--1'); //Select the element by id = "Section--1"
btnScrollTo.addEventListener('click', function (e) {
const s1coords = section1.getBoundingClientRect(); // Rectangle coordinates
section1.scrollIntoView({ behavior: 'smooth' });
});
////////////////////////////////////////////
//Page navigation
// document.querySelectorAll('.nav__link').forEach(function (el) {
// el.addEventListener('click', function (e) {
// e.preventDefault();
// document
// .querySelector(this.getAttribute('href'))
// .scrollIntoView({ behavior: 'smooth' });
// });
// });
// 1. Add event listener to moom parent element
//2. Determine what element originated the event
document.querySelector('.nav__links').addEventListener('click', function (e) {
e.preventDefault();
// Matching strategy
if (e.target.classList.contains('nav__link')) {
document
.querySelector(e.target.getAttribute('href'))
?.scrollIntoView({ behavior: 'smooth' });
}
});
//Tabbed component
const tabs = document.querySelectorAll('.operations__tab');
const tabsContainer = document.querySelector('.operations__tab-container');
const tabsContent = document.querySelectorAll('.operations__content');
tabsContainer.addEventListener('click', function (e) {
const clicked = e.target.closest('.operations__tab');
//Guard clause
if (!clicked) return;
//Remove active classes
tabs.forEach(t => t.classList.remove('operations__tab--active'));
tabsContent.forEach(c => c.classList.remove('operations__content--active'));
//Active tab
clicked.classList.add('operations__tab--active');
//Activate content area
document
.querySelector(`.operations__content--${clicked.dataset.tab}`)
.classList.add('operations__content--active');
});
// Menu fade animation on buttons
const handleHover = function (e) {
if (e.target.classList.contains('nav__link')) {
const link = e.target;
const siblins = link.closest('.nav').querySelectorAll('.nav__link');
const logo = link.closest('.nav').querySelector('img');
siblins.forEach(el => {
if (el !== link) el.style.opacity = this; //(this === 0.5)
});
logo.style.opacity = this; //(this === 1)
}
};
// Passing "argument" into the handler with bind method (this)
nav.addEventListener('mouseover', handleHover.bind(0.5));
nav.addEventListener('mouseout', handleHover.bind(1));
// // Sticky navigation (NOT EFFICIENT)
// const initialcoods = section1.getBoundingClientRect();
// console.log(initialcoods);
// window.addEventListener('scroll', function () {
// console.log(window.scrollY);
// if (window.scrollY > initialcoods.top) nav.classList.add('sticky');
// else nav.classList.remove('sticky');
// });
// const obsCallback = function (entries, observer) {
// entries.forEach(entry => {
// console.log(entry);
// });
// };
// const obsOptions = { root: null, threshold: [0, 0.2] };
// const observer = new IntersectionObserver(obsCallback, obsOptions);
//observer.observe(section1);
//Intersection Observer API ------------------------------------------- IMPORTANT!!
//Sticky navigation: Intersection Observer API
// // Sticky navigation (NOT EFFICIENT)
const header = document.querySelector('.header'); // select teh header element
const navHeight = nav.getBoundingClientRect().height; // get the nav height
const stickyNav = function (entries) {
const [entry] = entries; // get entries of the headerObserver
if (!entry.isIntersecting) nav.classList.add('sticky');
else nav.classList.remove('sticky');
};
const headerObserver = new IntersectionObserver(stickyNav, {
root: null,
threshold: 0, // the sticky class will be added only when the section is not visible(observed)
rootMargin: `-${navHeight}px`, // add sticky class before so it wont overload the section
});
headerObserver.observe(header);
//Reveal sections
const allSections = document.querySelectorAll('.section');
const revealSection = function (entries, observer) {
const [entry] = entries;
if (!entry.isIntersecting) return; //Guard Clause
entry.target.classList.remove('section--hidden');
observer.unobserve(entry.target); // unobserve the target so it can improve performance after the effects are done
};
const sectionObserver = new IntersectionObserver(revealSection, {
root: null,
threshold: 0.15,
});
allSections.forEach(function (section) {
sectionObserver.observe(section);
//section.classList.add('section--hidden');
});
//Lazy loading images
const imgTargets = document.querySelectorAll('img[data-src]');
//load img
const loadImg = function (entries, observer) {
const [entry] = entries;
if (!entry.isIntersecting) return;
// Replace src with data-src
entry.target.src = entry.target.dataset.src;
//remove the blur effect class only when the image is loaded
entry.target.addEventListener('load', function () {
entry.target.classList.remove('lazy-img');
});
//stop observing the img
observer.unobserve(entry.target);
};
const imgObserver = new IntersectionObserver(loadImg, {
root: null,
threshold: 0,
rootMargin: '200px',
});
imgTargets.forEach(img => imgObserver.observe(img));
//SLIDER ///////////////////////////////
const slider = function () {
//Selectors and variables
let curSlide = 0;
const slides = document.querySelectorAll('.slide');
const btnLeft = document.querySelector('.slider__btn--left');
const btnRight = document.querySelector('.slider__btn--right');
const dotContainer = document.querySelector('.dots');
const maxSlide = slides.length;
// SLIDER FUNCTIONS ///////////////
//Create slide dots
const createDots = function () {
// loop into slides so we can have the same number of dots
slides.forEach(function (_, i) {
dotContainer.insertAdjacentHTML(
'beforeend',
`<button class="dots__dot" data-slide="${i}"></button>`
);
});
};
//Activate dot
const activateDot = function (slide) {
document
.querySelectorAll('.dots__dot')
.forEach(dot => dot.classList.remove('dots__dot--active'));
document
.querySelector(`.dots__dot[data-slide="${slide}"]`)
.classList.add('dots__dot--active');
};
// place images side by side
//0%, 100%, 200%, 300%
const gotToSlide = function (slide) {
slides.forEach(
(s, i) => (s.style.transform = `translateX(${100 * (i - slide)}%)`)
);
};
// next slide
const nextSlide = function () {
if (curSlide === maxSlide - 1) {
curSlide = 0;
} else {
curSlide++;
}
gotToSlide(curSlide);
activateDot(curSlide);
};
//Previous Slide
const prevSlide = function () {
if (curSlide === 0) {
curSlide = maxSlide - 1;
} else {
curSlide--;
}
gotToSlide(curSlide);
activateDot(curSlide);
};
//Initialize slider
const init = function () {
gotToSlide(0);
createDots();
activateDot(0);
};
init();
// SLIDER EVENT HANDLERS ///////////////////////////////////////
//Buttons
btnRight.addEventListener('click', nextSlide);
btnLeft.addEventListener('click', prevSlide);
// Arrow keys to move the slider
document.addEventListener('keydown', function (e) {
e.key === 'ArrowLeft' && prevSlide(); // short circuiting (if key pressed, then execute the function)
e.key === 'ArrowRight' && nextSlide();
});
//dots
dotContainer.addEventListener('click', function (dot) {
if (dot.target.classList.contains('dots__dot')) {
const { slide } = dot.target.dataset;
gotToSlide(slide);
activateDot(slide);
}
});
// Different but also works
// dotContainer.addEventListener('click', function (dot) {
// if (dot.target.classList.contains('dots__dot')) {
// const curDot = dot.target.getAttribute('data-slide');
// gotToSlide(curDot);
// curSlide = curDot;
// activateDot(curDot);
// }
// });
};
//call function slider
slider();
////////////////////////////////////////////
////////////////////////////////////////////
////////////////////////////////////////////
////////////////////////////////////////////
// // TYPE of Events and Event Handlers
// const h1 = document.querySelector('h1');
// //NEW way of using events on elements. addEventListener is better because we can add more than one event at the same time!
// const alertH1 = function (e) {
// alert('addEventListener: Great! You are reading the heading :D'); // Hover mouse event on header
// h1.removeEventListener('mouseenter', alertH1); // REMOVE the eventListener so it wont happen again
// };
// h1.addEventListener('mouseenter', alertH1);
// setTimeout(() => h1.removeEventListener('mouseenter', alertH1), 3000); //Remove the eventListener after 3 seconds
// // OLD way of using events on elements
// // h1.onmouseenter = function (e) {
// // alert('addEventListener: Great! You are reading the heading :D'); // Hover mouse event on header
// // };
//console.log(s1coords);
// console.log(e.target.getBoundingClientRect());
// console.log('Current scroll (x/y)', window.pageXOffset, window.pageYOffset); // Current scroll position values **********************
// console.log(
// 'height/width viewport',
// document.documentElement.clientHeight, ************** // total size of the view heiht x width
// document.documentElement.clientWidth
// );
//rgb(255,255,255)
//SCROLLING ------------------------------
// window.scrollTo({
// // OLD method , calculating the possitions
// left: s1coords.left + window.pageXOffset,
// top: s1coords.top + window.pageYOffset,
// behavior: 'smooth',
// });
//MODERN method **sorcery**
/*
//EVENT propagation
const randomInt = (min, max) =>
Math.floor(Math.random() * (max - min + 1) + min);
const randomColor = () =>
`rgb(${randomInt(0, 255)},${randomInt(0, 255)},${randomInt(0, 255)})`;
//target element event (child element)
document.querySelector('.nav__link').addEventListener('click', function (e) {
this.style.backgroundColor = randomColor();
console.log('LINK', e.target, e.currentTarget);
//Stop propagation ----------------------
//e.stopPropagation();
});
//bubbling phase event propagation (parent element)
document.querySelector('.nav__links').addEventListener('click', function (e) {
this.style.backgroundColor = randomColor();
console.log('CONTAINER', e.target, e.currentTarget);
});
//bubbling phase event propagation (parent element)
document.querySelector('.nav').addEventListener(
'click',
function (e) {
this.style.backgroundColor = randomColor();
console.log('NAV', e.target, e.currentTarget);
},
true // this third parametre define the event on the capturing phase (will happen first)
);
//SELECTING Elements -----------------------------------
console.log(document.documentElement); // Selects the entire html document
console.log(document.head);
console.log(document.body);
const header = document.querySelector('.header');
const allSections = document.querySelectorAll('.section'); // Returns a nodeList (simillar to an array)
console.log(allSections);
document.getElementById('section--1');
const allButtons = document.getElementsByTagName('button'); // returns a HTMLCollection with all the buttons
console.log(allButtons);
console.log(document.getElementsByClassName('btn'));
//CREATING and INSERTING elements
// .insertAdjacentHTML
const message = document.createElement('div');
message.classList.add('cookie-message');
//message.textContent = 'We use cookies for improved functionaluty and analytics.';
message.innerHTML =
'We use cookies for improved functionaluty and analytics. <button class="btn btn--close-cookie"> Got it!</button>';
header.prepend(message); // top inside of the header element
//header.append(message.cloneNode(true)); // message must be cloned, otherwise it will just move the element to the bottom of the header
header.append(message); // bottom inside the header element
header.before(message); // outside* before the header element
header.after(message); // outside* after the header element
// DELETE Elements
//add and event listener on the button to remove the message element
document
.querySelector('.btn--close-cookie')
.addEventListener('click', function () {
// message.remove(); // NEW METHOD to remove elements
message.parentElement.removeChild(message); // OLD method to remove elemnts
});
//STYLES
message.style.backgroundColor = '#37383d';
message.style.width = '120%';
console.log(message.style.height); // can't read if the style is no in the DOM
console.log(message.style.backgroundColor); // can read if the style in a 'inline-style'
console.log(getComputedStyle(message).color); // to read the computed style of the element
console.log(getComputedStyle(message).height);
message.style.height =
Number.parseFloat(getComputedStyle(message).height, 10) + 30 + 'px'; // get the computed height and increase the hight value (must parse the string value returned from the function)
document.documentElement.style.setProperty('--color-primary', 'orangered'); // Select the css variable (--color-promary) and change the style value
//ATTRIBUTES
const logo = document.querySelector('.nav__logo');
console.log(logo.alt); // read the alt attribute of the selected element
console.log(logo.src); // return the whole url
console.log(logo.getAttribute('src')); //return the absolute value of the attribute
console.log(logo.className);
logo.alt = 'Beautiful minimalist logo';
// Non-standard attribute
console.log(logo.designer); // WONT read!
console.log(logo.getAttribute('designer')); // This will WORL!
logo.setAttribute('company', 'Bankist'); // Create an attribute in the element
logo.getAttribute('src');
const link = document.querySelector('.twitter-link');
console.log(link.href);
console.log(link.getAttribute('href')); // return the absolute value of the attribute
//Data attributes
console.log(logo.dataset.versionNumber); // get the data attribute: data-version-number="3.0"
//Classes
logo.classList.add('c');
logo.classList.remove('c');
logo.classList.toggle('c');
logo.classList.contains('c'); // not includes. like in arrays
logo.className = 'jonas'; // DON'T use this, it will overwrite all the other classes of the elements
*/
// const h1 = document.querySelector('h1');
// //Going downwards: child
// console.log(h1.querySelectorAll('.highlight'));
// console.log(h1.childNodes);
// console.log(h1.children);
// h1.firstElementChild.style.color = 'white';
// h1.lastElementChild.style.color = 'white';
// //Going upwards : parents
// console.log(h1.parentNode);
// console.log(h1.parentElement);
// // select the closest parent element with the class
// h1.closest('.header').style.background = 'var(--gradient-secondary)'; // find parent elements, the opposite of queryselector(finds deeper child elements)
// //Going sideways: siblins
// console.log(h1.previousElementSibling); // most used
// console.log(h1.nextElementSibling); // most used
// console.log(h1.previousSibling);
// console.log(h1.nextSibling);
// console.log(h1.parentElement.children);
// [...h1.parentElement.children].forEach(function (el) {
// if (el !== h1) el.style.transform = 'scale(0.5)'; // Select all elements but not the h1 itself, and make all of them 5% smaller
// });
document.addEventListener('DOMContentLoaded', function (e) {
console.log('HTML parsed and DOM tree built', e);
});
window.addEventListener('load', function (e) {
console.log('Page fully loaded', e);
});
// window.addEventListener('beforeunload', function (e) {
// e.preventDefault();
// console.log(e);
// e.returnValue = '';
// });