Javascript垂直滑块
我正在尝试用javascript创建一个垂直滑块小部件。我不是在寻找任何插件或库,我只是想看看如何使用纯javascript实现。我想我大概知道了 请参阅此处了解到目前为止开发的内容,并查看源代码以查看代码,请在chrome中打开链接 问题: 1) 有时,当我将滑块移动到最顶部或最底部时,边界范围(例如:0,500)无法正确计算 2) 有时,当我释放鼠标(mouseup)时,滑块不会释放,即使在mouseup之后,滑块也会随着鼠标移动Javascript垂直滑块,javascript,html,css,widget,slider,Javascript,Html,Css,Widget,Slider,我正在尝试用javascript创建一个垂直滑块小部件。我不是在寻找任何插件或库,我只是想看看如何使用纯javascript实现。我想我大概知道了 请参阅此处了解到目前为止开发的内容,并查看源代码以查看代码,请在chrome中打开链接 问题: 1) 有时,当我将滑块移动到最顶部或最底部时,边界范围(例如:0,500)无法正确计算 2) 有时,当我释放鼠标(mouseup)时,滑块不会释放,即使在mouseup之后,滑块也会随着鼠标移动 3) 我只需要使用javascript就可以使代码更健壮、
3) 我只需要使用javascript就可以使代码更健壮、更流畅。就完成了。非常感谢你的帮助 这是HTML
Minimum Value: <input id="minimum-value" type="text" value="0" /> <br/>
Maximum Value: <input id="maximum-value" type="text" value="500" /> <br/>
<input id="submit-value" type="submit" value="Submit" /> <br/>
Slider Value: <span id="sliderValue"></span> <br/>
<div id="slider-container">
<div id="slider-bar"></div>
<div id="slider-handle"></div>
</div>
这是js
(function () {
// html elements
var container = document.getElementById("slider-container");
var slider = document.getElementById("slider-bar");
var handle = document.getElementById("slider-handle");
var submitVal = document.getElementById("submit-value");
// initial values
var minVal = Number( document.getElementById("minimum-value").value );
var maxVal = Number( document.getElementById("maximum-value").value );
var range = maxVal - minVal;
var isSliding = false;
// recalculate range
submitVal.onclick = function() {
minVal = Number( document.getElementById("minimum-value").value );
maxVal = Number( document.getElementById("maximum-value").value );
range = maxVal - minVal;
};
// the sliding function
var move = function(e) {
var mouseY = 0;
var containerTop = 0;
var newHeight = 0;
var containerHeight = 0;
var percentHght = 0;
var x = 0;
var y = 0;
var sliderValue = 0;
if (!e) var e = window.event;
if( e.pageY ){ // all browsers except IE before version 9
mouseY = e.pageY;
} else if ( e.clientY ) { // IE before version 9
mouseY = e.clientY;
}
containerTop = container.offsetTop;
newHeight = mouseY - containerTop;
containerHeight = container.offsetHeight;
percentHght = newHeight * 100 / containerHeight;
if( (percentHght <= 100) && (percentHght >= 0) ) {
slider.style.height = (percentHght) + '%';
y = 100 - percentHght;
x = y * range / 100;
} else if( percentHght < 0 ) {
percentHght = 0;
slider.style.height = (percentHght) + '%';
y = 100 - percentHght;
x = y * range / 100;
} else if( percentHght > 100 ) {
percentHght = 100;
slider.style.height = (percentHght) + '%';
y = 100 - percentHght;
x = y * range / 100;
}
sliderValue = Math.round(x);
document.getElementById('sliderValue').innerHTML = sliderValue + minVal;
};
// adding the slide functionality
var addSlide = function() {
isSliding = true;
if ( !window.addEventListener ){
document.attachEvent('onmousemove',move);
} else {
document.addEventListener('mousemove', move, false);
}
};
// removing the slide functionality
var cancelSlide = function() {
if( isSliding ) {
if ( window.removeEventListener ) {
document.removeEventListener('mousemove', move, false);
} else if ( window.detachEvent ) {
document.detachEvent('onmousemove', move );
}
}
};
// cancelling event bubbling
// cancelling default event action
var cancelBubble = function(e) {
var evt = e ? e:window.event;
if( evt.stopPropogation ){
evt.stopPropogation();
}
if( evt.cancelBubble != null ){
evt.cancelBubble = true;
}
if( evt.preventDefault ){
evt.preventDefault();
} else {
evt.returnValue = false;
}
};
// capture events
//capturing the mousedown on the handle
handle.onmousedown = function(e) {
addSlide();
cancelBubble(e);
}
//capture the mouseup on the handle
handle.onmouseup = function(e) {
cancelSlide();
cancelBubble(e);
}
// capture the mouse up on the slider
slider.onmouseup = function(e) {
cancelSlide();
cancelBubble(e);
}
// capture the mouse down on the slider
slider.onmousedown = function(e) {
move(e);
cancelBubble(e);
}
// capture the mouse up on the container
container.onmouseup = function(e) {
cancelSlide();
cancelBubble(e);
}
// capture the mouse down on the container
container.onmousedown = function(e) {
move(e);
cancelBubble(e);
}
// capture the mouse up on the window
document.onmouseup = function(e) {
cancelSlide();
cancelBubble(e);
}
})();
(函数(){
//html元素
var container=document.getElementById(“滑块容器”);
var slider=document.getElementById(“滑块”);
var handle=document.getElementById(“滑块句柄”);
var submitVal=document.getElementById(“提交值”);
//初始值
var minVal=Number(document.getElementById(“最小值”).value);
var maxVal=Number(document.getElementById(“最大值”).value);
var范围=最大值-最小值;
var isSliding=假;
//重新计算范围
submitVal.onclick=函数(){
minVal=编号(document.getElementById(“最小值”).value);
maxVal=编号(document.getElementById(“最大值”).value);
范围=最大值-最小值;
};
//滑动函数
变量移动=函数(e){
var-mouseY=0;
var containerTop=0;
var newHeight=0;
var containerHeight=0;
var percentHght=0;
var x=0;
var y=0;
var sliderValue=0;
如果(!e)var e=window.event;
if(e.pageY){//除IE版本9之前的所有浏览器
mouseY=e.pageY;
}else如果(e.clientY){//IE在版本9之前
穆西=e.clientY;
}
containerTop=container.offsetTop;
newHeight=mouseY-containerTop;
containerHeight=container.offsetHeight;
百分比高=新高度*100/集装箱高度;
如果((百分比Hght=0)){
slider.style.height=(percentHght)+'%';
y=100%高GHT;
x=y*范围/100;
}否则如果(百分比Hght<0){
百分比Hght=0;
slider.style.height=(percentHght)+'%';
y=100%高GHT;
x=y*范围/100;
}否则,如果(百分比>100){
百分比Hght=100;
slider.style.height=(percentHght)+'%';
y=100%高GHT;
x=y*范围/100;
}
sliderValue=数学圆(x);
document.getElementById('sliderValue')。innerHTML=sliderValue+minVal;
};
//添加幻灯片功能
var addSlide=function(){
isSliding=真;
如果(!window.addEventListener){
文件。附件('onmousemove',move);
}否则{
document.addEventListener('mousemove',move,false);
}
};
//删除幻灯片功能
var cancelSlide=函数(){
如果(滑动){
如果(window.removeEventListener){
document.removeEventListener('mousemove',move,false);
}else if(window.detachEvent){
document.detachEvent('onmousemove',move);
}
}
};
//取消事件冒泡
//取消默认事件操作
var cancelBubble=函数(e){
var evt=e?e:window.event;
如果(evt.stopPropogation){
evt.stopPropogation();
}
if(evt.cancelBubble!=null){
evt.cancelBubble=真;
}
如果(evt.preventDefault){
evt.preventDefault();
}否则{
evt.returnValue=false;
}
};
//捕捉事件
//捕捉手柄上的鼠标向下移动
handle.onmousedown=函数(e){
添加幻灯片();
取消气泡(e);
}
//抓住把手上的鼠标
handle.onmouseup=函数(e){
取消幻灯片();
取消气泡(e);
}
//在滑块上捕捉鼠标
slider.onmouseup=函数(e){
取消幻灯片();
取消气泡(e);
}
//在滑块上向下捕捉鼠标
slider.onmousedown=函数(e){
动议(e);
取消气泡(e);
}
//在容器上捕获鼠标
container.onmouseup=函数(e){
取消幻灯片();
取消气泡(e);
}
//在容器上捕获鼠标
container.onmousedown=函数(e){
动议(e);
取消气泡(e);
}
//捕捉窗口上的鼠标
document.onmouseup=函数(e){
取消幻灯片();
取消气泡(e);
}
})();
这里是jsfiddle链接
这是一个链接输出端JSFIDLE
顺便说一下,添加以下内容:
slider.onmouseuout = slider.onmouseup;
每一个onmouseup声明的末尾都会出现这样的情况,如果滑块滑出滑块手柄,滑块仍然跟随指针的问题就会消失。添加得太好了
还要改变这一点:
stopPropogation() --> stopPropagation() // spelling mistake
一个更好的方法是完全避免停止播放,因为这是一种不好的做法。有趣的文章:
如果您想要更大的手柄点击区域,例如添加触摸支持时:
#slider-handle {
position: relative;
width: 75px;
height: 48px;
left: -32.5px;
top: -24px;
border-radius: 50% / 50%;
border: 1px solid red; /* remove after test */
cursor: grab;
}
#slider-handle:after {
content: '';
position: absolute;
width: 100%;
height: 20%;
top: 40%;
left: 0;
background: #fff;
border-radius: 50%/50%;
}
请一次提出一个问题,并在问题中直接包含相关代码。排除这种情况:在
mousedown
中使用preventDefault
。它会阻止选择和拖动。你能提供JSFIDDLE吗?我给了你的答案一个向上的投票…直到我发现没有办法反转它的操作(最小在顶部,最大在底部)。唉,我也很挣扎
#slider-handle {
position: relative;
width: 75px;
height: 48px;
left: -32.5px;
top: -24px;
border-radius: 50% / 50%;
border: 1px solid red; /* remove after test */
cursor: grab;
}
#slider-handle:after {
content: '';
position: absolute;
width: 100%;
height: 20%;
top: 40%;
left: 0;
background: #fff;
border-radius: 50%/50%;
}