如何创建js和html css

Question

Responsive width and height for a group of squares

I'm creating a grid of 1:1 squares. The user can keep adding squares and I want the size of the squares to be maintained at their aspect ratio but resize accordingly. The tricky part is I want the square to always be visible on the page - that is to say that there is no scrolling and the webpage would be responsive with width and height.

I have created an example that adds a square every second while testing this. However, I am unable to get it working with the height part. I have been able to get it working with the width.

 setInterval(() => { console.log(document.getElementsByClassName('square-container')[0]); document.getElementsByClassName('square-container')[0].innerHTML += (" <div class = 'square' > < /div>"); }, 1000);

 .square-container { display: flex; flex-wrap: wrap; } .square { position: relative; flex-basis: calc(33.333% - 10px); margin: 5px; box-sizing: border-box; background: red; transition: background 1s; } .square::before { content: ""; display: block; padding-top: 100%; }

 <div class="square-container"> <div class="square"></div> </div>

I'm not using any ui libraries like bootstrap, just vanilla html, css and javascript.

Answer 1

One way would be to automatically scroll to the bottom on the screen as each square is added. I added this line window.scrollTo(0,document.body.scrollHeight); to your code which makes it scroll down as a new line is created.

 setInterval(() => { //console.log(document.getElementsByClassName('square-container')[0]); document.getElementsByClassName('square-container')[0].innerHTML += (" <div class = 'square' > < /div>"); window.scrollTo(0,document.body.scrollHeight); }, 1000);

 .square-container { display: flex; flex-wrap: wrap; } .square { position: relative; flex-basis: calc(33.333% - 10px); margin: 5px; box-sizing: border-box; background: red; transition: background 1s; } .square::before { content: ""; display: block; padding-top: 100%; }

 <div class="square-container"> <div class="square"></div> </div>

Otherwise if you meant that you want the squares to resize so that all of they would all fit to the height of the window that would be different. I had a look around to see if something like this could be done but could not figure it out.