div根据内部内容调整大小并保持纵横比

Question

为了完全理解，我制作了一个代码笔示例，请查看此链接https://codepen.io/hasan-irshad/pen/bGpPZzB

这是我用于右下角的代码

if (currentResizer.classList.contains('bottom-right')) {
const width = original_width + (e.pageX - original_mouse_x);
const height = original_height + (e.pageY - original_mouse_y)
if (width > minimum_size) {
element.style.width = width + 'px'
element.style.height = 'max-content';
let Textdiv = document.getElementById('Text');
let relFontsizew = Textdiv.offsetWidth * 0.25;
Textdiv.style.fontSize = relFontsizew + 'px';
}
}

如果你从右下角调整div的大小，它可以很好地工作，就像我希望它工作的那样，从右下角度，它根据鼠标-X增加/减少div的宽度，根据内部内容的高度增加/减小div的高度。这是我想在所有角落实现的行为。

例如，如果我从右下角拖动，使左上角保持在它的位置就像我从右上角调整它的大小一样，左下角应该保持它的位置。

预期行为1外部元件的宽度应取决于鼠标-X2字体大小应取决于外部div的宽度3外部div的高度应取决于内部内容的高度4div元素不应丢失其位置

下面是我想要实现的最终结果演示的视频链接。drive.google.com/file/d/1Wgh3GhEOhv1syk_WFmcCGp0UJUyGzS5u/view

有谁能帮我完成这项任务吗？

提前感谢！！！！！

Answer 1

我注释了你不需要的东西，并插入了你应该添加的东西，主要是你不需要设置实际位置，你需要将高度设置为"最大内容"；，你唯一一次添加脚本来更改字体大小是在右下角。

let Textdiv = document.getElementById('Text');
let relFontsizew = Textdiv.offsetWidth * 0.25;
Textdiv.style.fontSize = relFontsizew + 'px';

/*Make resizable div by Hung Nguyen*/

function makeResizableDiv(div) {
const element = document.querySelector(div);
const resizers = document.querySelectorAll(div + ' .resizer')
const minimum_size = 20;
let original_width = 0;
let original_height = 0;
let original_x = 0;
let original_y = 0;
let original_mouse_x = 0;
let original_mouse_y = 0;
for (let i = 0;i < resizers.length; i++) {
const currentResizer = resizers[i];
currentResizer.addEventListener('mousedown', function(e) {
e.preventDefault()
original_width = parseFloat(getComputedStyle(element, null).getPropertyValue('width').replace('px', ''));
original_height = parseFloat(getComputedStyle(element, null).getPropertyValue('height').replace('px', ''));
original_x = element.getBoundingClientRect().left;
original_y = element.getBoundingClientRect().top;
original_mouse_x = e.pageX;
original_mouse_y = e.pageY;
window.addEventListener('mousemove', resize)
window.addEventListener('mouseup', stopResize)
})

function resize(e) {
if (currentResizer.classList.contains('bottom-right')) {
const width = original_width + (e.pageX - original_mouse_x);
const height = original_height + (e.pageY - original_mouse_y)
if (width > minimum_size) {
element.style.width = width + 'px'
element.style.height = 'max-content';
let Textdiv = document.getElementById('Text');
let relFontsizew = Textdiv.offsetWidth * 0.25;
Textdiv.style.fontSize = relFontsizew + 'px';
}
}
else if (currentResizer.classList.contains('bottom-left')) {
const height = original_height + (e.pageY - original_mouse_y)
const width = original_width - (e.pageX - original_mouse_x)
if (height > minimum_size) {
element.style.height = "max-content"
}
if (width > minimum_size) {
element.style.width = width + 'px'
element.style.left = original_x + (e.pageX - original_mouse_x) + 'px'
let Textdiv = document.getElementById('Text');
let relFontsizew = Textdiv.offsetWidth * 0.25;
Textdiv.style.fontSize = relFontsizew + 'px';
}
}
else if (currentResizer.classList.contains('top-right')) {
const width = original_width + (e.pageX - original_mouse_x)
const height = original_height - (e.pageY - original_mouse_y)
if (width > minimum_size) {
element.style.width = width + 'px'
element.style.height = "max-content"
//element.style.top = original_y + (e.pageY - original_mouse_y) + 'px'
let Textdiv = document.getElementById('Text');
let relFontsizew = Textdiv.offsetWidth * 0.25;
Textdiv.style.fontSize = relFontsizew + 'px';
}
}
else {
const width = original_width - (e.pageX - original_mouse_x)
const height = original_height - (e.pageY - original_mouse_y)
if (width > minimum_size) {
element.style.width = width + 'px'
element.style.left = original_x + (e.pageX - original_mouse_x) + 'px'
}
if (height > minimum_size) {
element.style.height = "max-content"
//element.style.top = original_y + (e.pageY - original_mouse_y) + 'px'
}
let Textdiv = document.getElementById('Text');
let relFontsizew = Textdiv.offsetWidth * 0.25;
Textdiv.style.fontSize = relFontsizew + 'px';
}
}

function stopResize() {
window.removeEventListener('mousemove', resize)
}
}
}
makeResizableDiv('.resizable')

body,
html {
background: black;
}
.resizable {
background: white;
width: 100px;
height: 100px;
position: absolute;
top: 100px;
left: 100px;
}
.resizable .resizers{
width: 100%;
height: 100%;
border: 3px solid #4286f4;
box-sizing: border-box;
}
.resizable .resizers .resizer{
width: 10px;
height: 10px;
border-radius: 50%; /*magic to turn square into circle*/
background: white;
border: 3px solid #4286f4;
position: absolute;
}
.resizable .resizers .resizer.top-left {
left: -5px;
top: -5px;
cursor: nwse-resize; /*resizer cursor*/
}
.resizable .resizers .resizer.top-right {
right: -5px;
top: -5px;
cursor: nesw-resize;
}
.resizable .resizers .resizer.bottom-left {
left: -5px;
bottom: -5px;
cursor: nesw-resize;
}
.resizable .resizers .resizer.bottom-right {
right: -5px;
bottom: -5px;
cursor: nwse-resize;
}

<div class='resizable'>
<div class='resizers'>
<div class='resizer top-left'></div>
<div class='resizer top-right'></div>
<div class='resizer bottom-left'></div>
<div class='resizer bottom-right'></div>
<article id="Text" style=" width:100%; font-size:22px; color:black">Any Text</article>
</div>

</div>