Browser-level image lazy-loading for the web

PHOTO

Fri Mar 04 2022 03:30:53 GMT+0000 (Coordinated Universal Time)

Saved by @mboljar #html

<picture>
  <source media="(min-width: 800px)" srcset="large.jpg 1x, larger.jpg 2x">
  <img src="photo.jpg" loading="lazy">
</picture>

https://web.dev/browser-level-image-lazy-loading/

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Javascript

@mboljar

hide all elements specified check if the element has the specified class smooth-scroll to the top of the page check if the parent element contains the child element create an object containing the parameters of the current URL encode a set of form elements as an object retrieve a set of properties indicated by the given selectors from an object invoke the provided function after wait (in milliseconds) trigger a specific event on a given element, optionally passing custom data remove an event listener from an element get readable format of the given number of milliseconds get the difference (in days) between two dates make a GET request to the passed URL make a POST request to the passed URL create a counter with the specified range, step and duration for the specified selector copy a string to the clipboard find out if the browser tab of the page is focused create a directory, if it does not exist defer draggable Object.create() Object.create() - Person Object GET request with Callback Web Storage API Web Storage API Browser-level image lazy-loading for the web Browser-level image lazy-loading for the web You can detect support for the loading attribute to load lazysizes as a fallback library only when loading isn't supported Add a web app manifest Front-end Content Management — ExpressionEngine 6.2.7 Documentation- CALLBACK Using lit-html standalone – Lit Working with JSON - Learn web development | MDN Response - An Ajax Call async promise

#html #javascript #nodejs

How to Save HTML Form Data in JSON - Express

<form action="/new" method="post">
 
  <input name="title" type="text">
  <input name="description" type="text">
  <button type="submit">Submit Form</button>
 
</form>

> More steps

#html #javascript #jsfunctions #dom #dommanipulation

getAttribute() - how to get the value of any attribute of HTML element

<html>

<input id="contact" name="address">

<script>

    var x = document.getElementById("contact").getAttribute('name');

</script>

</html>

#html #jquery #css #navbar

Underline active navbar link

// in css:
/* Display line under clicked navbar link */
.active {
  text-decoration-line: underline !important;
  text-decoration-thickness: 2px !important;
  color: rgb(20, 19, 19);
}

//in html: 
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>

    <script>
      $(document).ready(function () {
        // Underline to remain in navbar after click using URL
        jQuery(function ($) {
          var path = window.location.href; // because the 'href' property of the DOM element is the absolute path
          $('.nav-link').each(function () {
            if (this.href === path) {
              $(this).addClass('active');
            }
          });
        });
      });
    </script>

//Note class in link should be nav-link

C:/Users/intel/Desktop/dig%20fest/Mohd%20Midhlaj%20A%20A%206E%20Website%20Building/index.html

Bootstrap Starter Template

<!doctype html>
<html lang="en">
  <head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">

    <title>Hello, world!</title>
  </head>
  <body>
    <h1>Hello, world!</h1>

    <!-- Optional JavaScript -->
    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
    <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
  </body>
</html>

Background Image That Doesn't Scroll on Webpage

body{
    background-image: url("img_tree.gif");
    background-repeat: no-repeat;
    background-attachment: fixed;
}

How to Create a Table in HTML

<table>
  <tr>
    <th>Name</th>
    <th>Phone</th>
    <th>Age</th>
  </tr>
  <tr>
    <td>Khan</td>
    <td>12345</td>
    <td>23</td>
  </tr>
  <tr>
    <td>Jamal</td>
    <td>54321</td>
    <td>45</td>
  </tr>
</table>

#html #javascript

Stop YouTube Embedded Video from Playing with Javascript

<main>
	<iframe src="https://www.youtube.com/embed/KQetemT1sWc"></iframe>   
    <a href="#!" onclick="stopThis()">Stop Playing</a>
</main>

<script>
  function stopThis(){
      var iframe = container.getElementsByTagName("iframe")[0];
      var url = iframe.getAttribute('src');
      iframe.setAttribute('src', '');
      iframe.setAttribute('src', url);
  }
</script>

HTML : Responsive Navbar

<!DOCTYPE html>
<!-- Created By TopArchives - www.toparchives.us -->
<html lang="en" dir="ltr">
  <head>
    <meta charset="utf-8">
    <title>Responsive Navbar | TopArchives</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="style.css">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.3/css/all.min.css"/>
  </head>
  <body>
    <nav>
      <input type="checkbox" id="check">
      <label for="check" class="checkbtn">
        <i class="fas fa-bars"></i>
      </label>
      <label class="logo">TopArchives</label>
      <ul>
        <li><a class="active" href="#">Home</a></li>
        <li><a href="#">About</a></li>
        <li><a href="#">Services</a></li>
        <li><a href="#">Contact</a></li>
        <li><a href="#">Feedback</a></li>
      </ul>
    </nav>
    <section></section>
  </body>
</html>
<!-- DON'T REMOVE CREDITS -->

Bootstrap Fixed Floating Buttons

<div class="fixed-action-btn" style="bottom: 45px; right: 24px;">
  <a class="btn-floating btn-lg red">
    <i class="fas fa-pencil-alt"></i>
  </a>

  <ul class="list-unstyled">
    <li><a class="btn-floating red"><i class="fas fa-star"></i></a></li>
    <li><a class="btn-floating yellow darken-1"><i class="fas fa-user"></i></a></li>
    <li><a class="btn-floating green"><i class="fas fa-envelope"></i></a></li>
    <li><a class="btn-floating blue"><i class="fas fa-shopping-cart"></i></a></li>
  </ul>
</div>

#javascript #eventos #mouse #css #html

mover un elemento junto al mouse, dentro de un div (eventos de mouse)

let hijo = document.querySelector('.hijo');
let etiqueta = document.querySelectorAll('.etiqueta');
//El metodo .getBoundingClientRect() nos da 
//la posicion de un elemento con respecto al viewport(en numeros).
// tomare la posicion constante del elemento .hijo 
const coords = hijo.getBoundingClientRect();
const j = coords.top; // estamos obteniendo la posicion top en numero
const k = coords.left;

// se aplica forEach para obtener posicion de cada movimiento del mouse
etiqueta.forEach(link => {
// se obtiene la posicion del mouse con la funcion  mover(e)
    function mover(e){
// se calcula la posicion top y left del mouse al cual le restamos
// la posicion del elemento "hijo"; resultado: mouse e "hijo" juntos 
	 let m = e.pageY ;
	 let n = e.pageX ;

	 let t = m - j;
	 let l = n - k;
	 hijo.style.top = t + "px"; // agregando px a los numeros
	 hijo.style.left = l + "px";
    };
// mouseover dice que entro en elemento etiqueta
    link.addEventListener("mouseover",() => {
	hijo.classList.add("edd1");// solo agrega un class que le da color red

	 window.addEventListener("mousemove",mover);// agrega el evento junto a la funcion 
    });

    link.addEventListener("mouseleave",() => {// mouseleave dice que salio del elemento etiqueta
	hijo.classList.remove("edd1"); // le quita un class, que le quita color red
	 window.removeEventListener("mousemove", mover);// remuev el evento
    });
});

/* Simples estilos para delimitar los div*/
.box{
width: 300px;
height: 300px;
border: solid 1px black;
}
.etiqueta{
width:100px;
height:100px;
position: absolute;
left:50px;
top:50px;
background: green;
overflow: hidden;
position:relative;
}
.hijo{
position: absolute;
width: 20px;
height: 20px;
border-radius: 50%;
background-color: blue;
transform: scale(0); /*desaparece el elemento hijo*/
}
.edd1{
background-color: red;
transform: scale(1); /*reaparece el elemento hijo con el mause al centro*/
} 

// un ejemplo con html
<div class="box">
  <div class="etiqueta">
  <div class="hijo"></div>
  </div>
</div>

Component library css link

<link rel="stylesheet" href="https://grapheneui.netlify.app/Components/components.css" />

#html #alpinejs

Set boolean to true after scrolling on page using Alpine.js

<div
    class="justify-between py-6 md:flex"
    x-data="{
        open: false,
        hasScrolled: false,
        reactOnScroll() {
            if (this.$el.getBoundingClientRect().top < 120 && window.scrollY > 120) {
                this.hasScrolled = true;
            } else {
                this.hasScrolled = false;
            }
        } 
    }"
    x-init="reactOnScroll()"
    @scroll.window="reactOnScroll()"
>

#html #javascript #jsfunctions #dom #dommanipulation

How to change any attribute of a HTML element

<html>	
   
   <input id="contact" name="address">
 
 <script>

    document.getElementById("contact").attribute = "phone";
	
    //ALTERNATIVE METHOD TO CHANGE
    document.getElementById("contact").setAttribute('name', 'phone');	

  </script>

</html>

#html #javascript

Display Date Objects in Shorter Format - MMM DD YYY HH:MM

<p id="date-stamp">Sat Dec 14 2019 16:58:20 GMT+0500 (Pakistan Standard Time)</p>

<script>
        var dateStamp = document.getElementById("date-stamp");
        var date = dateStamp.innerHTML;
        var date2 = date.substr(4, 17);
        dateStamp.innerHTML = date2;
    
</script>

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