我看了这篇文章，我想在更多的div上尝试同样的技术。
以上代码适用于2格，但不适用于4格。我试图找出原因，因此决定尝试以下代码。
var handler = document.querySelector('.handler');
var wrapperWidth;
var wrapper = handler.closest('.wrapper');
var box = wrapper.querySelector('.box');
var isHandlerDragging = false;
document.addEventListener('mousedown', function(e) {
// If mousedown event is fired from .handler, toggle flag to true
if (e.target === handler) {
isHandlerDragging = true;
}
});
document.addEventListener('mousemove', function(e) {
// Don't do anything if dragging flag is false
if (!isHandlerDragging) {
return false;
}
// Get offset
var containerOffsetLeft = wrapper.offsetLeft;
// Get x-coordinate of pointer relative to container
var pointerRelativeXpos = e.clientX - containerOffsetLeft;
// Arbitrary minimum width set on box A, otherwise its inner content will collapse to width of 0
var boxAminWidth = 60;
// Resize box A
// * 8px is the left/right spacing between .handler and its inner pseudo-element
// * Set flex-grow to 0 to prevent it from growing
wrapperWidth = wrapper.stlye.width;
box.style.width = (Math.max(boxAminWidth, wrapperWidth - 8)) + 'px';
box.style.flexGrow = 0;
});
document.addEventListener('mouseup', function(e) {
// Turn off dragging flag when user mouse is up
isHandlerDragging = false;
});.wrapper {
background-color: #fff;
color: #444;
/* Use flexbox */
display: flex;
}
.box {
background-color: #444;
color: #fff;
border-radius: 5px;
padding: 20px;
font-size: 150%;
/* Use box-sizing so that element's outerwidth will match width property */
box-sizing: border-box;
/* Allow box to grow and shrink, and ensure they are all equally sized */
flex: 1 1 1 1 auto;
}
.handler {
width: 20px;
padding: 0;
cursor: ew-resize;
flex: 0 0 auto;
}
.handler::before {
content: '';
display: block;
width: 4px;
height: 100%;
background: red;
margin: 0 auto;
}<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>JS Bin</title>
</head>
<body>
<div class="wrapper">
<div class="box">A</div>
<div class="handler"></div>
<div class="box">B</div>
<div class="handler"></div>
<div class="box">C</div>
<div class="handler"></div>
<div class="box">D</div>
</div>
</body>
</html>
我想发生的事情是让div可安排。
您可以在此处查看代码。
答案 0 :(得分：3)
如果这是您想要的
var wrapper = document.querySelector('.wrapper');
var box = null;
var isHandlerDragging = false;
var boxAminWidth = 60;
var new_width = 0, current_width = 0;
document.addEventListener('mousedown', function(e) {
// If mousedown event is fired from .handler, toggle flag to true
if (e.target.classList.contains('handler')) {
isHandlerDragging = true;
box = e.target.previousElementSibling;
}
});
document.addEventListener('mousemove', function(e) {
// Don't do anything if dragging flag is false or
if (!isHandlerDragging) {
return false;
}
// save the current box width
current_width = box.style.width;
// check the minimum width
if ((new_width = e.clientX - box.offsetLeft - 8 ) >= boxAminWidth) {
box.style.width = new_width + 'px';
}
// make sure the boxs dont go past the wrapper, aka: the overflow effect
//if they do, we recover the last width of the current box to keep the boxs inside the wrapper.
if(wrapper.lastElementChild.offsetLeft + wrapper.lastElementChild.offsetWidth > wrapper.offsetWidth) {
box.style.width = current_width;
}
});
document.addEventListener('mouseup', function(e) {
// Turn off dragging flag when user mouse is up
isHandlerDragging = false;
});.wrapper {
background-color: #fff;
color: #444;
/* Use flexbox */
display: flex;
}
.box {
background-color: #444;
color: #fff;
border-radius: 5px;
padding: 20px;
font-size: 150%;
/* Use box-sizing so that element's outerwidth will match width property */
box-sizing: border-box;
/* Allow box to grow and shrink, and ensure they are all equally sized */
flex: 1 1 1 1 auto;
-moz-user-select: none;
-khtml-user-select: none;
-webkit-user-select: none;
flex-grow: 0;
flex-shrink: 0;
}
.handler {
width: 20px;
padding: 0;
cursor: ew-resize;
flex: 0 0 auto;
}
.handler::before {
content: '';
display: block;
width: 4px;
height: 100%;
background: red;
margin: 0 auto;
}<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>JS Bin</title>
</head>
<body>
<div class="wrapper">
<div class="box">A</div>
<div class="handler"></div>
<div class="box">B</div>
<div class="handler"></div>
<div class="box">C</div>
<div class="handler"></div>
<div class="box">D</div>
</div>
</body>
</html>
我有一些发现：
var handler = document.querySelector('.handler');
此行代码（与jQuery不同）仅选择第一个处理程序，而不是全部选择处理程序，因此此检查if (e.target === handler)仅对第一个处理程序有效，因此mousemove会被选中。不能对所有人都起作用。
var box = wrapper.querySelector('.box');也是如此，您将始终在第一个方框中设置。
这是新的javaScript代码
var wrapper = document.querySelector('.wrapper');
var box = null;
var isHandlerDragging = false;
var boxAminWidth = 60;
var new_width = 0, current_width = 0;
document.addEventListener('mousedown', function(e) {
// If mousedown event is fired from .handler, toggle flag to true
if (e.target.classList.contains('handler')) {
isHandlerDragging = true;
box = e.target.previousElementSibling;
}
});
document.addEventListener('mousemove', function(e) {
// Don't do anything if dragging flag is false or
if (!isHandlerDragging) {
return false;
}
// save the current box width
current_width = box.style.width;
// check the minimum width
if ((new_width = e.clientX - box.offsetLeft - 8 ) >= boxAminWidth) {
box.style.width = new_width + 'px';
}
// make sure the boxs dont go past the wrapper, aka: the overflow effect
//if they do, we recover the last width of the current box to keep the boxs inside the wrapper.
if(wrapper.lastElementChild.offsetLeft + wrapper.lastElementChild.offsetWidth > wrapper.offsetWidth) {
box.style.width = current_width;
}
});
document.addEventListener('mouseup', function(e) {
// Turn off dragging flag when user mouse is up
isHandlerDragging = false;
});
在CSS中，我对box类做了一些小的改动：
.box {
/* ... */
-moz-user-select: none;
-khtml-user-select: none;
-webkit-user-select: none;
flex-grow: 0;
flex-shrink: 0;
}