CSS: Masonry design

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Wed Feb 25 2026 11:55:35 GMT+0000 (Coordinated Universal Time)

Saved by @marcopinero #css #html

.grid {
  columns: 18rem;
  gap: 1rem;
  counter-reset: grid;
}

.item + .item {
  margin-top: 1rem;
}

.item {
  break-inside: avoid;
  aspect-ratio: 4 / 3;
  background: pink;
  padding: 1rem;
  border-radius: 0.75rem;
}

.item::before {
  counter-increment: grid;
  content: counter(grid);
}

.item:nth-child(3n) {
  aspect-ratio: 1;
  background: lavender;
}

.item:nth-child(3n - 1) {
  aspect-ratio: 2 / 3;
  background: lightblue;
}

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How to Save HTML Form Data in JSON - Express

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A Modern CSS Reset - Piccalilli

/* Box sizing rules */
*,
*::before,
*::after {
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}

/* Remove default margin */
body,
h1,
h2,
h3,
h4,
p,
figure,
blockquote,
dl,
dd {
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/* Remove list styles on ul, ol elements with a list role, which suggests default styling will be removed */
ul[role='list'],
ol[role='list'] {
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/* Set core root defaults */
html:focus-within {
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/* Set core body defaults */
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/* A elements that don't have a class get default styles */
a:not([class]) {
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/* Make images easier to work with */
img,
picture {
  max-width: 100%;
  display: block;
}

/* Inherit fonts for inputs and buttons */
input,
button,
textarea,
select {
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}

/* Remove all animations, transitions and smooth scroll for people that prefer not to see them */
@media (prefers-reduced-motion: reduce) {
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#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 {
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  text-decoration-thickness: 2px !important;
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}

//in html: 
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    <script>
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//Note class in link should be nav-link

Firefox CSS backdrop-filter workaround

/* slightly transparent fallback */
.backdrop-blur {
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}

/* if backdrop support: very transparent and blurred */
@supports ((-webkit-backdrop-filter: blur(2em)) or (backdrop-filter: blur(2em))) {
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#html #javascript

Stop YouTube Embedded Video from Playing with Javascript

<main>
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</main>

<script>
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Background Image That Doesn't Scroll on Webpage

body{
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Bootstrap Starter Template

<!doctype html>
<html lang="en">
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#banner .slick-dots {
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#banner .slick-dots li button {
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Bootstrap Fixed Floating Buttons

<div class="fixed-action-btn" style="bottom: 45px; right: 24px;">
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#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>

Header JavaScript

const header = document.querySelector('header');
let lastScroll = 0;
const scrollThreshold = 10; 

window.addEventListener('scroll', () => {
    const currentScroll = window.scrollY;

    if (currentScroll > lastScroll && currentScroll > scrollThreshold) {
        header.classList.add('small');
    } else if (currentScroll === 0) {
        header.classList.remove('small');
    }

    lastScroll = currentScroll;
});

const hamburger = document.querySelector(".hamburger");
const navmenu = document.querySelector(".nav-menu");

hamburger.addEventListener("click", () => {
    hamburger.classList.toggle("active");
    navmenu.classList.toggle("active");
});

document.querySelectorAll(".nav-link").forEach(n => n.addEventListener("click", () => {
    hamburger.classList.remove("active");
    navmenu.classList.remove("active");
}));

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