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我正在研究 SVG 仪表，我想在范围 slider 移动到带有渐变颜色的事件笔触填充时将半圆分成几部分。并且想在计针移动时再增加一条黑色运行轨迹。我曾尝试使用 stroke-dasharray 但添加此代码后，所有颜色都会同时出现，仪表无法正常工作。
/* set radius for all circles */
var r = 400;
var circles = document.querySelectorAll('.circle');
var total_circles = circles.length;
for (var i = 0; i < total_circles; i++) {
circles[i].setAttribute('r', r);
}
/* set meter's wrapper dimension */
var meter_dimension = (r * 2) + 100;
var wrapper = document.querySelector('#wrapper');
wrapper.style.width = meter_dimension + 'px';
wrapper.style.height = meter_dimension + 'px';
/* add strokes to circles */
var cf = 2 * Math.PI * r;
var semi_cf = cf / 2;
var semi_cf_1by3 = semi_cf / 3;
var semi_cf_2by3 = semi_cf_1by3 * 2;
document.querySelector('#outline_curves').setAttribute('stroke-dasharray', semi_cf + ',' + cf);
document.querySelector('#high').setAttribute('stroke-dasharray', semi_cf + ',' + cf);
document.querySelector('#avg').setAttribute('stroke-dasharray', semi_cf_2by3 + ',' + cf);
document.querySelector('#low').setAttribute('stroke-dasharray', semi_cf_1by3 + ',' + cf);
document.querySelector('#outline_ends').setAttribute('stroke-dasharray', 2 + ',' + (semi_cf - 2));
document.querySelector('#mask').setAttribute('stroke-dasharray', semi_cf + ',' + cf);
/*bind range slider event*/
var slider = document.querySelector('#slider');
var lbl = document.querySelector("#lbl");
var mask = document.querySelector('#mask');
var meter_needle = document.querySelector('#meter_needle');
function range_change_event() {
var percent = slider.value
var meter_value = semi_cf - ((percent * semi_cf) / 100);
mask.setAttribute('stroke-dasharray', meter_value + ',' + cf);
meter_needle.style.transform = 'rotate(' + (450 - ((percent * 180) / 100)) + 'deg)';
lbl.textContent = percent + '%';
}
slider.addEventListener('input', range_change_event);#wrapper {
position: relative;
margin: auto;
}
#meter {
width: 100%;
height: 100%;
transform: rotate(180deg);
}
.circle {
fill: none;
}
.outline,
#mask {
stroke: #F1F1F1;
stroke-width: 65;
}
.range {
stroke-width: 60;
}
#slider,
#lbl {
position: absolute;
}
#slider {
position: absolute;
transform: rotate(180deg);
cursor: pointer;
left: 0;
margin: auto;
right: 0;
top: 58%;
width: 94%;
}
#lbl {
background-color: #4B4C51;
border-radius: 2px;
color: white;
font-family: 'courier new';
font-size: 15pt;
font-weight: bold;
padding: 4px 4px 2px 4px;
right: -48px;
top: 57%;
}
#meter_needle {
height: 40%;
left: 0;
margin: auto;
position: absolute;
right: 0;
top: 10%;
transform-origin: bottom center;
/*orientation fix*/
transform: rotate(450deg);
width: 5px;
background-color: red;
}<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<body>
<div id="wrapper">
<svg id="meter">
<circle id="outline_curves" class="circle outline" cx="50%" cy="50%">
</circle>
<circle id="high" class="circle range" cx="50%" cy="50%" stroke="#FDE47F">
</circle>
<circle id="avg" class="circle range" cx="50%" cy="50%" stroke="#7CCCE5">
</circle>
<circle id="low" class="circle range" cx="50%" cy="50%" stroke="#E04644">
</circle>
<circle id="mask" class="circle" cx="50%" cy="50%" >
</circle>
<circle id="outline_ends" class="circle outline" cx="50%" cy="50%">
</circle>
</svg>
<svg version="1.1" id="meter_needle" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="16.721px" height="93.834px" viewBox="0 0 16.721 93.834" enable-background="new 0 0 16.721 93.834" xml:space="preserve">
<path fill="#464646" d="M13.886,84.243L2.83,83.875c0,0,3.648-70.77,3.956-74.981C7.104,4.562,7.832,0,8.528,0
c0.695,0,1.752,4.268,2.053,8.894C10.883,13.521,13.886,84.243,13.886,84.243z"/>
<path fill="#464646" d="M16.721,85.475c0,4.615-3.743,8.359-8.36,8.359S0,90.09,0,85.475c0-4.62,3.743-8.363,8.36-8.363
S16.721,80.855,16.721,85.475z"/>
<circle fill="#EEEEEE" cx="8.426" cy="85.471" r="2.691"/>
</svg>
<input id="slider" type="range" min="25" max="100" step="25" value="0" />
<label id="lbl" id="value" for="">0%</label>
</div>
<script src="script.js"></script>
</body><script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="65px" height="51.333px" viewBox="0 0 65 51.333" enable-background="new 0 0 65 51.333" xml:space="preserve">
<g>
<defs>
<rect id="SVGID_1_" x="-157.417" y="-176.417" width="648" height="864"/>
</defs>
<clipPath id="SVGID_2_">
<use xlink:href="#SVGID_1_" overflow="visible"/>
</clipPath>
<g clip-path="url(#SVGID_2_)">
<defs>
<rect id="SVGID_3_" x="-157.417" y="-176.417" width="648" height="864"/>
</defs>
<clipPath id="SVGID_4_">
<use xlink:href="#SVGID_3_" overflow="visible"/>
</clipPath>
</g>
<g clip-path="url(#SVGID_2_)">
<defs>
<rect id="SVGID_5_" x="-157.417" y="-176.417" width="648" height="864"/>
</defs>
<clipPath id="SVGID_6_">
<use xlink:href="#SVGID_5_" overflow="visible"/>
</clipPath>
</g>
<g clip-path="url(#SVGID_2_)">
<defs>
<rect id="SVGID_7_" x="-157.417" y="-176.417" width="648" height="864"/>
</defs>
<clipPath id="SVGID_8_">
<use xlink:href="#SVGID_7_" overflow="visible"/>
</clipPath>
<path clip-path="url(#SVGID_8_)" fill="#FFFFFF" d="M19.527,44.274c-1.653,5.015-7.059,7.738-12.071,6.085
c-5.015-1.654-7.739-7.058-6.087-12.071c1.652-5.015,7.058-7.739,12.072-6.084C18.456,33.855,21.179,39.26,19.527,44.274"/>
<path clip-path="url(#SVGID_8_)" fill="#58595B" d="M19.514,44.289c-1.652,5.013-7.056,7.736-12.066,6.083
c-5.014-1.653-7.736-7.056-6.084-12.067c1.652-5.013,7.055-7.736,12.068-6.083C18.443,33.875,21.166,39.277,19.514,44.289"/>
<path clip-path="url(#SVGID_8_)" fill="#FFFFFF" d="M17.318,43.564c-1.253,3.801-5.35,5.865-9.15,4.612
c-3.797-1.253-5.863-5.35-4.609-9.148c1.254-3.8,5.349-5.865,9.148-4.612C16.506,35.67,18.57,39.766,17.318,43.564"/>
<path clip-path="url(#SVGID_8_)" fill="#58595B" d="M19.266,34.944c2.242,3.113,2.33,7.115,0.57,10.255l45.249-43.24L9.721,31.148
C13.256,30.475,17.023,31.828,19.266,34.944"/>
<defs>
<filter id="Adobe_OpacityMaskFilter" filterUnits="userSpaceOnUse" x="6.52" y="-11.184" width="62.369" height="60.661">
<feFlood style="flood-color:white;flood-opacity:1" result="back"/>
<feBlend in="SourceGraphic" in2="back" mode="normal"/>
</filter>
</defs>
<mask maskUnits="userSpaceOnUse" x="6.52" y="-11.184" width="62.369" height="60.661" id="SVGID_9_">
<g filter="url(#Adobe_OpacityMaskFilter)">
<g enable-background="new ">
<g enable-background="new ">
<g>
<defs>
<path id="SVGID_10_" d="M17.516,29.352c2.243,0.335,3.028,2.134,3.028,2.134L57.891,6.807L17.516,29.352z"/>
</defs>
<clipPath id="SVGID_11_" clip-path="url(#SVGID_8_)">
<use xlink:href="#SVGID_10_" overflow="visible"/>
</clipPath>
<defs>
<filter id="Adobe_OpacityMaskFilter_1_" filterUnits="userSpaceOnUse" x="6.52" y="-11.184" width="62.369" height="60.661">
<feFlood style="flood-color:white;flood-opacity:1" result="back"/>
<feBlend in="SourceGraphic" in2="back" mode="normal"/>
</filter>
</defs>
<mask maskUnits="userSpaceOnUse" x="6.52" y="-11.184" width="62.369" height="60.661" id="SVGID_9_">
<g filter="url(#Adobe_OpacityMaskFilter_1_)">
<g enable-background="new ">
</g>
</g>
</mask>
<linearGradient id="SVGID_12_" gradientUnits="userSpaceOnUse" x1="-236.1787" y1="699.8169" x2="-235.1792" y2="699.8169" gradientTransform="matrix(36.5072 -22.3825 22.3825 36.5072 -7021.3823 -30804.627)">
<stop offset="0" style="stop-color:#FFFFFF"/>
<stop offset="0.0466" style="stop-color:#D5D7D8"/>
<stop offset="0.0983" style="stop-color:#B1B3B6"/>
<stop offset="0.1557" style="stop-color:#929497"/>
<stop offset="0.2174" style="stop-color:#797A7D"/>
<stop offset="0.2847" style="stop-color:#626366"/>
<stop offset="0.3595" style="stop-color:#4E4E50"/>
<stop offset="0.445" style="stop-color:#3B3B3C"/>
<stop offset="0.5476" style="stop-color:#202021"/>
<stop offset="0.6848" style="stop-color:#080809"/>
<stop offset="1" style="stop-color:#000000"/>
</linearGradient>
<polygon clip-path="url(#SVGID_11_)" mask="url(#SVGID_9_)" fill="url(#SVGID_12_)" points="28.547,49.477 68.889,24.744
46.861,-11.184 6.52,13.549 "/>
</g>
</g>
</g>
</g>
</mask>
<g opacity="0.8" clip-path="url(#SVGID_8_)">
<g>
<defs>
<rect id="SVGID_13_" x="6.52" y="-11.184" width="62.369" height="60.661"/>
</defs>
<clipPath id="SVGID_14_">
<use xlink:href="#SVGID_13_" overflow="visible"/>
</clipPath>
<g clip-path="url(#SVGID_14_)">
<defs>
<path id="SVGID_15_" d="M17.516,29.352c2.243,0.335,3.028,2.134,3.028,2.134L57.891,6.807L17.516,29.352z"/>
</defs>
<clipPath id="SVGID_16_">
<use xlink:href="#SVGID_15_" overflow="visible"/>
</clipPath>
<linearGradient id="SVGID_17_" gradientUnits="userSpaceOnUse" x1="-236.1787" y1="699.8169" x2="-235.1792" y2="699.8169" gradientTransform="matrix(36.5072 -22.3825 22.3825 36.5072 -7021.3823 -30804.627)">
<stop offset="0" style="stop-color:#FFFFFF"/>
<stop offset="0.1467" style="stop-color:#FFFFFF"/>
<stop offset="1" style="stop-color:#FFFFFF"/>
</linearGradient>
<polygon clip-path="url(#SVGID_16_)" fill="url(#SVGID_17_)" points="28.547,49.477 68.889,24.744 46.861,-11.184 6.52,13.549
"/>
</g>
</g>
</g>
<path clip-path="url(#SVGID_8_)" fill="#58595B" d="M12.709,42.044c-0.412,1.254-1.765,1.936-3.02,1.523
c-1.253-0.414-1.934-1.765-1.52-3.019c0.412-1.253,1.764-1.936,3.017-1.521C12.44,39.441,13.121,40.792,12.709,42.044"/>
</g>
</g>
</svg>
最佳答案
这是一个有效的 SVG 示例，带有一点 javascript。
从您的问题中不清楚您到底想要什么颜色的分区
看起来像。现在我刚刚把它们变成了纯红色。但是您可以通过更改 fill 使它们看起来像您想要的那样。的<rect id="meter-colours" .../> .
let METER_DIVISIONS = 10;
let METER_DIVISIONS_GAP = 4;
// Initialise meter
let meterDivisionsElem = document.getElementById("meter-divisions");
// Calculate size of each meter division
let totalLen = meterDivisionsElem.getAttribute("r") * Math.PI;
let numGaps = METER_DIVISIONS - 1;
let divLen = (totalLen - METER_DIVISIONS_GAP * numGaps) / METER_DIVISIONS;
// Set meter divisions dash pattern
let pat = divLen + ' ' + METER_DIVISIONS_GAP + ' ';
meterDivisionsElem.setAttribute("stroke-dasharray", pat.repeat(numGaps) + ' ' + divLen + ' ' + totalLen);
// The slider form element
let sliderElem = document.getElementById("slider");
// The slider label element
let sliderLabelElem = document.getElementById("lbl");
// The needle element
let needleElem = document.getElementById("needle");
// The black bar element
let blackBarElem = document.getElementById("black-bar");
let blackBarLen = blackBarElem.getAttribute("r") * Math.PI;
// The meter colours element
let meterColoursElem = document.getElementById("meter-colours");
function setMeterTo(value)
{
// Update slider label
sliderLabelElem.textContent = value + '%';
// Update needle position
let rotation = value * 180 / 100;
needleElem.setAttribute("transform", "rotate(" + rotation + ")");
// Update black bar length
let barLen = value * blackBarLen / 100;
blackBarElem.setAttribute("stroke-dasharray", barLen + ' ' + (2 * blackBarLen));
// Update coloured division section of the meter
meterColoursElem.setAttribute("transform", "rotate(" + rotation + ")");
}
// Add an input change handler to the slider
sliderElem.addEventListener("input", function(evt) {
setMeterTo(evt.target.value);
});
// Initialise meter to start value
setMeterTo(25);#wrapper {
width: 600px;
}
#slider {
width: 100%;
}
#needle {
stroke-linecap: round;
}<div id="wrapper">
<svg id="meter" viewBox="0 0 200 110">
<defs>
<circle id="meter-divisions" r="90" stroke-width="20" stroke-dasharray="282.7"/>
<mask id="meter-divisions-mask">
<use xlink:href="#meter-divisions" stroke="white"/>
</mask>
</defs>
<g transform="translate(100,100) scale(1,-1)" fill="none">
<!-- The grey meter divisions -->
<use xlink:href="#meter-divisions" stroke="lightgrey"/>
<!-- The inner semicircular black bar -->
<circle id="black-bar" r="74" stroke="black" stroke-width="4" stroke-dasharray="232.5"/>
<!-- the needle -->
<line id="needle" x2="70" y2="0" stroke="black" stroke-width="2" stroke-dasharray="282.7"/>
<!-- The coloured form of the ,meter divisions that gets rotated into view with the needle.
It is initially off screen but gets revealed as it rotates. It is masked by using
a shape matching the gray divisions -->
<g mask="url(#meter-divisions-mask">
<rect id="meter-colours" x="-100" y="-100" width="200" height="100" fill="red"/>
</g>
</g>
</svg>
<input id="slider" type="range" min="25" max="100" step="25" value="25" />
<label id="lbl" id="value" for="">0%</label>
</div><svg width="650px" viewBox="0 0 65 51.333">
<g>
<path fill="#58595B" fill-rule="evenodd" d="M19.514,44.289c-1.652,5.013-7.056,7.736-12.066,6.083c-5.014-1.653-7.736-7.056-6.084-12.067c1.652-5.013,7.055-7.736,12.068-6.083C18.443,33.875,21.166,39.277,19.514,44.289 M17.318,43.564c-1.253,3.801-5.35,5.865-9.15,4.612c-3.797-1.253-5.863-5.35-4.609-9.148c1.254-3.8,5.349-5.865,9.148-4.612C16.506,35.67,18.57,39.766,17.318,43.564 M12.709,42.044c-0.412,1.254-1.765,1.936-3.02,1.523c-1.253-0.414-1.934-1.765-1.52-3.019c0.412-1.253,1.764-1.936,3.017-1.521C12.44,39.441,13.121,40.792,12.709,42.044"/>
<path fill="#58595B" d="M19.266,34.944c2.242,3.113,2.33,7.115,0.57,10.255l45.249-43.24L9.721,31.148C13.256,30.475,17.023,31.828,19.266,34.944"/>
<path fill="#FFFFFF" fill-opacity="0.8" d="M17.516,29.352c2.243,0.335,3.028,2.134,3.028,2.134L57.891,6.807L17.516,29.352z"/>
</g>
</svg>(10.44, 41.3)将旋转归零所需的旋转为
35.8 deg .
(0,0) 为中心我们需要首先将新针移动和旋转这些数量。
<svg width="650px" viewBox="0 0 65 51.333">
<g transform="rotate(35.8) translate(-10.44, -41.3)">
<path fill="#58595B" fill-rule="evenodd" d="M19.514,44.289c-1.652,5.013-7.056,7.736-12.066,6.083c-5.014-1.653-7.736-7.056-6.084-12.067c1.652-5.013,7.055-7.736,12.068-6.083C18.443,33.875,21.166,39.277,19.514,44.289 M17.318,43.564c-1.253,3.801-5.35,5.865-9.15,4.612c-3.797-1.253-5.863-5.35-4.609-9.148c1.254-3.8,5.349-5.865,9.148-4.612C16.506,35.67,18.57,39.766,17.318,43.564 M12.709,42.044c-0.412,1.254-1.765,1.936-3.02,1.523c-1.253-0.414-1.934-1.765-1.52-3.019c0.412-1.253,1.764-1.936,3.017-1.521C12.44,39.441,13.121,40.792,12.709,42.044"/>
<path fill="#58595B" d="M19.266,34.944c2.242,3.113,2.33,7.115,0.57,10.255l45.249-43.24L9.721,31.148C13.256,30.475,17.023,31.828,19.266,34.944"/>
<path fill="#FFFFFF" fill-opacity="0.8" d="M17.516,29.352c2.243,0.335,3.028,2.134,3.028,2.134L57.891,6.807L17.516,29.352z"/>
</g>
</svg>let METER_DIVISIONS = 10;
let METER_DIVISIONS_GAP = 4;
// Initialise meter
let meterDivisionsElem = document.getElementById("meter-divisions");
// Calculate size of each meter division
let totalLen = meterDivisionsElem.getAttribute("r") * Math.PI;
let numGaps = METER_DIVISIONS - 1;
let divLen = (totalLen - METER_DIVISIONS_GAP * numGaps) / METER_DIVISIONS;
// Set meter divisions dash pattern
let pat = divLen + ' ' + METER_DIVISIONS_GAP + ' ';
meterDivisionsElem.setAttribute("stroke-dasharray", pat.repeat(numGaps) + ' ' + divLen + ' ' + totalLen);
// The slider form element
let sliderElem = document.getElementById("slider");
// The slider label element
let sliderLabelElem = document.getElementById("lbl");
// The needle element
let needleElem = document.getElementById("needle");
// The black bar element
let blackBarElem = document.getElementById("black-bar");
let blackBarLen = blackBarElem.getAttribute("r") * Math.PI;
// The meter colours element
let meterColoursElem = document.getElementById("meter-colours");
function setMeterTo(value)
{
// Update slider label
sliderLabelElem.textContent = value + '%';
// Update needle position
let rotation = value * 180 / 100;
needleElem.setAttribute("transform", "rotate(" + (-rotation) + ")");
// Update black bar length
let barLen = value * blackBarLen / 100;
blackBarElem.setAttribute("stroke-dasharray", barLen + ' ' + (2 * blackBarLen));
// Update coloured division section of the meter
meterColoursElem.setAttribute("transform", "rotate(" + rotation + ")");
}
// Add an input change handler to the slider
sliderElem.addEventListener("input", function(evt) {
setMeterTo(evt.target.value);
});
// Initialise meter to start value
setMeterTo(25);#wrapper {
width: 600px;
}
#slider {
width: 100%;
}
#needle {
stroke-linecap: round;
}<div id="wrapper">
<svg id="meter" viewBox="0 0 200 110">
<defs>
<circle id="meter-divisions" r="90" stroke-width="20" stroke-dasharray="282.7"/>
<mask id="meter-divisions-mask">
<use xlink:href="#meter-divisions" stroke="white"/>
</mask>
</defs>
<g transform="translate(100,100)">
<g transform="scale(1,-1)" fill="none">
<!-- The grey meter divisions -->
<use xlink:href="#meter-divisions" stroke="lightgrey"/>
<!-- The inner semicircular black bar -->
<circle id="black-bar" r="74" stroke="black" stroke-width="4" stroke-dasharray="232.5"/>
<!-- The coloured form of the ,meter divisions that gets rotated into view with the needle.
It is initially off screen but gets revealed as it rotates. It is masked by using
a shape matching the gray divisions -->
<g mask="url(#meter-divisions-mask">
<rect id="meter-colours" x="-100" y="-100" width="200" height="100" fill="red"/>
</g>
</g>
<!-- the needle -->
<g id="needle">
<g transform="rotate(35.8) translate(-10.44, -41.3)">
<path fill="#58595B" fill-rule="evenodd" d="M19.514,44.289c-1.652,5.013-7.056,7.736-12.066,6.083c-5.014-1.653-7.736-7.056-6.084-12.067c1.652-5.013,7.055-7.736,12.068-6.083C18.443,33.875,21.166,39.277,19.514,44.289 M17.318,43.564c-1.253,3.801-5.35,5.865-9.15,4.612c-3.797-1.253-5.863-5.35-4.609-9.148c1.254-3.8,5.349-5.865,9.148-4.612C16.506,35.67,18.57,39.766,17.318,43.564 M12.709,42.044c-0.412,1.254-1.765,1.936-3.02,1.523c-1.253-0.414-1.934-1.765-1.52-3.019c0.412-1.253,1.764-1.936,3.017-1.521C12.44,39.441,13.121,40.792,12.709,42.044"/>
<path fill="#58595B" d="M19.266,34.944c2.242,3.113,2.33,7.115,0.57,10.255l45.249-43.24L9.721,31.148C13.256,30.475,17.023,31.828,19.266,34.944"/>
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<input id="slider" type="range" min="25" max="100" step="25" value="25" />
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</div>关于javascript - 用 stroke-dasharray 和事件颜色填充划分半圆，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/66025363/
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我正在尝试将 WPF CodeBehid 事件(如 Event、Handler、EventSetter)转换为 MVVM 模式。我不允许使用 System.Windows.Controls，因为我使用
我可能误解了 Backbone 中的事件系统，但是当我尝试以下代码时什么也没有发生。当我向 Backbone.Events 扩展对象添加新属性时，它不应该触发某种更改、更新或重置事件吗？就像模型一样吗
我遇到了一个简单的问题，就是无法弄清楚为什么它不起作用。我有一个子组件“app-buttons”，其中我有一个输入字段，我想听，所以我可以根据输入值过滤列表。 如果我将输入放在我有列表的根组件中，一切
System.Timers.Timer 的 Elapsed 事件实际上与 System.Windows.Forms.Timer 的 Tick 事件相同吗？ 在特定情况下使用其中一种比使用另一种有优势吗
嗨，这个 javascript 代码段是什么意思。(evt) 部分是如此令人困惑.. evt 不是 bool 值。这个怎么运作？ function checkIt(evt) { evt
我正在使用jquery full calendar我试图在事件被删除时保存它。 $('calendar').fullCalendar ({
我有两个链接的鼠标事件: $('body > form').on("mousedown", function(e){ //Do stuff }).on("mouseup", function(
这是我的代码: $( '#Example' ).on( "keypress", function( keyEvent ) { if ( keyEvent.which != 44 ) {
我尝试了 dragOver 事件处理程序，但它没有正常工作。 我正在研究钢琴，我希望能够弹奏音符，即使那个键上没有发生鼠标按下。 是否有事件处理程序？ 下面是我正在制作的钢琴的图片。 最佳答案 您应该
当悬停在相邻文本上时，我需要使隐藏按钮可见。这是通过 onMouseEnter 和 onMouseLeave 事件完成的。但是当点击另外的文本时，我需要使按钮完全可见并停止 onMouseLeave
我有ul标签内 div标签。我申请了mouseup事件 div标记和 click事件 ul标签。 问题 每当我点击 ul标签，然后都是 mouseup和 click事件被触发。 我想要的是当我点击 u
我是 Javascript 和 jQuery 的新手，所以我有一个非常愚蠢的疑问，请耐心等待 $(document).click(function () { alert("!"); v
我有一个邮政编码解析器，我正在使用 keyup 事件处理程序来跟踪输入长度何时达到 5，然后查询服务器以解析邮政编码。但是我想防止脚本被不必要地调用，所以我想知道是否有一种方法可以跟踪 keydown
使用事件 API，我有以下代码来发布带有事件照片的事件 $facebook = new Facebook(array( "appId" => "XXX", "se
首次加载 Microsoft Word 时，既不会触发 NewDocument 事件也不会触发 DocumentOpen 事件。当 Word 实例已打开并打开新文档或现有文档时，这些事件会正常触发。
我发现了很多相关问题(这里和其他地方)，但还没有具体找到这个问题。 我正在尝试监听箭头键 (37-40) 的按键事件，但是当以特定顺序使用箭头键时，后续箭头不会生成“按键”事件。 例子: http:/
给定的 HTML: 和 JavaScript 的: var $test = $('#test'); $test.on('keydown', function(event) { if (eve
我是 Node.js 的新手，希望使用流运行程序。对于其他程序，我必须同时启动一个服务器(mongodb、redis 等)，但我不知道我是否应该用这个运行一个服务器。请让我知道我哪里出了问题以及如何纠
我正在尝试使用 Swift 和 Cocoa 创建一个适用于 OS X 的应用程序。我希望应用程序能够响应关键事件，而不将焦点放在文本字段上/文本字段中。我在 Xcode 中创建了一个带有 Storyb
我有以下代码: (function(w,d,s,l,i){ w[l]=w[l]||[];w[l].push({
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