CSS SVG 上的 transform-origin 未按预期工作
CSS transform-origin on SVG not working as expected
我正在尝试创建可点击的地图。这个想法是点击一个区域会启动一个指向该特定区域的缩放动画。
到目前为止，我设法计算了每个包含 getBBox() 区域的 SVG 矩形的中心。这显示为紫色圆圈
现在我无法理解如何在特定坐标上缩放，根据我的想法，这与上一步计算的相同。
每次单击不同的 <path> 时，下面的代码基本上都会更新 <g id="italy" class="c"> 组元素的 transform-origin 样式 属性。
问题是如何缩放 SVG 并以特定坐标为中心？
或者如何缩放 SVG 并仅将具有特定 ID 的路径居中？
.c {
fill: rebeccapurple;
transition: 1s;
fill-opacity: 0.7;
stroke: #000000;
stroke-width: 0.4px;
transform: scale(0.7);
}
.c-zoom{
transform: scale(2);
}
.d:hover {
fill-opacity: 1;
}
.map-container{
position: relative;
}
<html>
<head>
<title>test</title>
<link rel="stylesheet" href="test2.css">
</head>
<body>
<div class="map-container" id="map">
<svg
xmlns:mapsvg="http://mapsvg.com"
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:svg="http://www.w3.org/2000/svg"
xmlns="http://www.w3.org/2000/svg"
mapsvg:geoViewBox="6.624486 47.092916 18.521301 35.490303"
width="430"
height="515"
id="svg">
<g id="italy" class="c">
<circle id="circle" cx="121" cy="495" r="5"></circle>
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title="Emilia-Romagna"
id="IT-45" />
<path class="d"
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title="Liguria"
id="IT-42" />
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title="Lombardia"
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d="m 303.90021,157.45051 -1.35,0.77 0.94,-1.05 -0.9,-0.37 1.6,-0.18 -0.29,0.83 z m -1.64,-2.1 1.19,0.9 -2.37,0.53 0.62,-1.75 0.56,0.32 z m -0.37,-124.080005 2.84,1.95 5.54,-0.56 2.07,0.74 0.89,1.09 0,0 -0.19,1.8 0.97,1.66 -0.7,2.27 0.88,1.16 -2.55,0.06 -3.46,2.18 -0.12,0.94 1.23,0.8 0.4,1.74 -1.82,-0.78 -1.04,0.79 -1.85,-0.79 -1.57,1.25 -0.41,-0.43 -1.48,2.04 -0.28,1.75 -2,1.76 0.32,1.39 -0.6,-0.27 0.18,0.6 -1.83,0.93 -0.33,2.02 -1.91,-0.27 -1.04,0.84 0.04,1.99 -1.8,1.89 2.12,2.85 2.08,-0.01 0.26,1.58 1.84,-0.1 0.3,2.13 2.42,1.95 -0.45,3.58 -2.9,1.96 -1.77,2.81 0.92,0.8 0.71,2.6 0.02,3.47 1.43,0.04 1.05,1.51 1.48,0.01 1.26,4.53 1.39,1.26 -0.21,1.2 2,1.05 0.68,-1.6 1.24,0.66 0.12,0.9 1.12,0.52 0.05,1.62 3.88,-3.59 0.67,0.68 1.98,-2.1 1.13,0.84 -0.43,1 0.63,0.73 0.55,-1.04 2.17,-1.08 0.64,0.07 -0.4,1.1 1.25,1.14 1.52,-0.94 0.49,1.09 1.55,-0.5 -0.45,-1.41 0.59,-0.24 0.58,1.58 -0.04,0.31 0.4,0.37 -0.17,0.82 0.82,0.35 -1.09,0.64 2.03,1.93 -0.49,0.26 0.65,1.300005 -0.35,1.17 0.97,-0.71 0.57,2.67 0.79,0.2 -0.37,0.8 1.01,0.81 -0.17,1.32 0.98,-0.12 -0.12,0.61 1.07,0.6 0,0 -0.56,0.77 -4.92,0.34 0.09,-0.75 -0.91,-0.35 -0.48,1.36 -3,0.39 -0.95,1.29 -6.26,3.91 -15.92,7.41 -1.53,1.97 -1.67,-0.84 -1.92,2.58 -1.44,2.81 -0.1,1.08 0.83,0.39 -1.08,0.4 -1.56,6.49 1.36,0.42 -1.08,1.07 0.57,2.52 1.28,1.45 -0.29,5.3 1.44,1.22 1.58,3.1 -0.51,-0.34 -0.8,0.95 0.91,0.56 0.86,-0.63 -0.24,1.11 0.51,0.14 0.55,-0.31 -0.44,-1.76 0.49,0.03 4.3,5.37 -0.66,4.47 -1.07,0.98 0.04,2.85 -1.6,-0.55 0.34,-2.86 -1.02,-0.44 -0.92,0.38 -0.75,1.72 0.87,1.09 -0.38,2.07 0.78,0.66 0.65,-0.45 0.06,0.72 -1.32,-0.13 -0.11,1.44 -2.41,-1.92 0,0 -0.6,-2.18 -1.99,-0.51 -0.64,-0.95 -0.33,-2.89 0.63,-1.24 -0.83,-1.08 -1.08,0.01 -1.46,1.29 -2.15,-0.17 -0.81,-1.05 -1.48,0.97 -2.29,-3.08 -6.7,-1.07 -2.2,0.78 -6.27,-0.08 -2.92,1.36 -0.74,2.22 -3.19,0.9 -2.01,1.9 -1.24,0.12 -0.71,-0.24 -0.43,-1.62 -2.1,-1.41 -5.7,0.38 -0.16,-1.49 0,0 -0.23,-1.03 -7.98,-4.28 0,-2.46 -1.42,0.85 -3.13,-1.16 0.59,-1.62 -0.41,-1.01 1.27,-1.02 -3,-1.12 -0.93,1.68 -1.36,-0.73 -0.24,1.27 -1.2,-0.22 -2.32,-1.95 0.96,-1.88 -0.87,-0.55 -1.61,0.32 0.38,-1.71 -0.79,-1.22 -2.87,-1.3 0.1,-1.3 -1.82,-0.48 -0.11,-0.68 -2.64,-0.59 -1.12,-2.35 -1.96,-1.92 -2.41,2.01 -0.51,-0.99 -1.49,-0.38 0.68,-1.91 -0.99,-1.49 1.3,-0.97 -0.96,-0.75 0.96,-2.57 -2.46,-1.13 -0.7,0.81 -0.83,-0.18 0.41,-1.98 -1.13,-11.75 11.09,-16.500005 0,0 2.68,1.66 -1.28,1.1 0.77,1.52 -2.18,4.030005 2.18,0.01 2.05,1.02 -0.65,1.13 1.49,0.93 1.49,-1.69 0.49,1.05 1.85,-2.66 0.44,1.17 1.64,-0.88 1.93,1.84 1.6,0.21 2.5,-3.37 -0.13,-3.600005 1.55,0.15 -0.6,-2.37 2.35,-2.83 0.87,-4.9 2.42,0.18 -0.02,-1.36 0.07,0.78 2.48,1.34 -0.35,-0.98 0.68,-1.54 1.29,-0.16 -0.37,-2.84 3.62,0.23 2.74,-2.26 2.15,-0.29 1.89,0.6 0.54,2.81 4.21,0.3 0.91,-1.87 -1.14,-2.02 0.73,-0.8 -0.73,-0.68 2.06,-0.6 -0.93,-1.54 0.01,-2.02 2.74,-0.87 0.67,0.77 0.74,-0.77 2.24,0.24 4.18,-1.46 1.71,-3.95 1.1,0.44 0.6,-1.6 -2.42,-2.22 0.79,-1.97 -1.21,-0.58 -0.64,0.41 -0.44,-1.94 -2.16,0.5 -0.79,-0.7 0.68,-1.89 -0.58,-1.41 -2.92,-2.43 2.36,-1.44 0.81,0.74 0.27,-3.66 2.3,-2.71 -0.59,-1.39 -3.08,-0.42 0.12,-1.65 4.87,-2.46 1.57,0.33 1.17,-1.18 1.16,-0.07 0.58,0.77 2.47,-3.92 -0.17,-1.48 1.52,-2.69 -0.31,-2.33 3.94,3.08 0.83,-0.29 1.55,0.98 0.11,2.26 3.34,-2.65 1.21,0.76 2.98,-0.94 0.75,0.89 1.26,-0.06 0.51,-0.46 -0.38,-1.32 0.87,0.2 1.67,-1.88 2.47,-0.92 0,0 1.41,-0.09 z"
title="Veneto"
id="IT-34" />
</g>
</svg>
</div>
<button id="btn" >Debug button</button>
<script>
window.addEventListener("load",function(){
let ita = document.getElementById("italy");
let btn = document.getElementById("btn");
let regions = document.getElementsByClassName("d")
btn.addEventListener("click",(e)=>{
ita.classList.toggle("c-zoom")
})
for(r of regions){
r.addEventListener("click",(e)=>{
let childPos = e.target.getBBox();
const x = childPos.x + childPos.width/2
const y = childPos.y + childPos.height/2
const fin = x + "px " + y + "px"
console.log(fin)
document.getElementById("circle").setAttribute("cx", x);
document.getElementById("circle").setAttribute("cy", y);
ita.style['transform-origin'] = fin;
ita.classList.toggle("c-zoom")
})
}
},false)
</script>
</body>
</html>
除非我误解了问题，否则问题很可能来自动画 svg 视图框内的 g 元素。
transform-origin 和 class 切换整个 svg 也是如此。如果你走这条路线以获得流畅的动画，你可能需要添加一些 CSS 过渡，比如 transition: all ease-in-out .2s; on #svg 和 .c-zoom
IMO 你这里有三个主要问题。
缩放过程中的“摇摆”是由于您在缩放的同时移动了transform-origin造成的。您可以通过确保只有转换受 transition 设置影响来解决此问题。
transition: transform 1s;
其次，因为元素已经有scale(0.7)，当你用scale(2)替换它时，地图跳转。您可以通过将初始比例移动到父容器来解决这个问题。但是对于下面的示例，我刚刚删除了初始缩放。
最后，我假设您真的想将区域放大到屏幕中间。当前方法的问题是您正在围绕新的变换原点进行缩放。所以该地区的中心保持原样。您可以通过调整计算出的 transform-origin 来解决此问题，以便该区域在缩放时向屏幕中心移动。
window.addEventListener("load",function(){
let ita = document.getElementById("italy");
let btn = document.getElementById("btn");
let regions = document.getElementsByClassName("d");
let centreX = 215;
let centreY = 257.5;
btn.addEventListener("click",(e)=>{
ita.classList.toggle("c-zoom")
})
for(r of regions){
r.addEventListener("click",(e)=>{
let childPos = e.target.getBBox();
const x = childPos.x + childPos.width/2
const y = childPos.y + childPos.height/2
// Calculate an origin offset that means that when scaled by "zoom",
// the point x,y ends up at the centre of the SVG.
const zoom = 2;
const dx = (x - centreX) / (zoom - 1);
const dy = (y - centreY) / (zoom - 1);
const fin = (x + dx) + "px " + (y + dy) + "px"
//console.log(fin)
document.getElementById("circle").setAttribute("cx", x);
document.getElementById("circle").setAttribute("cy", y);
ita.style['transform-origin'] = fin;
ita.classList.toggle("c-zoom")
})
}
},false)
.c {
fill: rebeccapurple;
transition: transform 1s;
fill-opacity: 0.7;
stroke: #000000;
stroke-width: 0.4px;
}
.c-zoom{
transform: scale(2);
}
.d:hover {
fill-opacity: 1;
}
.map-container{
position: relative;
}
svg {
border: solid 1px black;
}
<div class="map-container" id="map">
<svg
xmlns:mapsvg="http://mapsvg.com"
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:svg="http://www.w3.org/2000/svg"
xmlns="http://www.w3.org/2000/svg"
mapsvg:geoViewBox="6.624486 47.092916 18.521301 35.490303"
width="430"
height="515"
id="svg">
<g id="italy" class="c">
<circle id="circle" cx="121" cy="495" r="5"></circle>
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title="Emilia-Romagna"
id="IT-45" />
<path class="d"
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title="Liguria"
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title="Trentino-Alto Adige"
id="IT-32" />
<path class="d"
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title="Valle d'Aosta"
id="IT-23" />
<path class="d"
d="m 303.90021,157.45051 -1.35,0.77 0.94,-1.05 -0.9,-0.37 1.6,-0.18 -0.29,0.83 z m -1.64,-2.1 1.19,0.9 -2.37,0.53 0.62,-1.75 0.56,0.32 z m -0.37,-124.080005 2.84,1.95 5.54,-0.56 2.07,0.74 0.89,1.09 0,0 -0.19,1.8 0.97,1.66 -0.7,2.27 0.88,1.16 -2.55,0.06 -3.46,2.18 -0.12,0.94 1.23,0.8 0.4,1.74 -1.82,-0.78 -1.04,0.79 -1.85,-0.79 -1.57,1.25 -0.41,-0.43 -1.48,2.04 -0.28,1.75 -2,1.76 0.32,1.39 -0.6,-0.27 0.18,0.6 -1.83,0.93 -0.33,2.02 -1.91,-0.27 -1.04,0.84 0.04,1.99 -1.8,1.89 2.12,2.85 2.08,-0.01 0.26,1.58 1.84,-0.1 0.3,2.13 2.42,1.95 -0.45,3.58 -2.9,1.96 -1.77,2.81 0.92,0.8 0.71,2.6 0.02,3.47 1.43,0.04 1.05,1.51 1.48,0.01 1.26,4.53 1.39,1.26 -0.21,1.2 2,1.05 0.68,-1.6 1.24,0.66 0.12,0.9 1.12,0.52 0.05,1.62 3.88,-3.59 0.67,0.68 1.98,-2.1 1.13,0.84 -0.43,1 0.63,0.73 0.55,-1.04 2.17,-1.08 0.64,0.07 -0.4,1.1 1.25,1.14 1.52,-0.94 0.49,1.09 1.55,-0.5 -0.45,-1.41 0.59,-0.24 0.58,1.58 -0.04,0.31 0.4,0.37 -0.17,0.82 0.82,0.35 -1.09,0.64 2.03,1.93 -0.49,0.26 0.65,1.300005 -0.35,1.17 0.97,-0.71 0.57,2.67 0.79,0.2 -0.37,0.8 1.01,0.81 -0.17,1.32 0.98,-0.12 -0.12,0.61 1.07,0.6 0,0 -0.56,0.77 -4.92,0.34 0.09,-0.75 -0.91,-0.35 -0.48,1.36 -3,0.39 -0.95,1.29 -6.26,3.91 -15.92,7.41 -1.53,1.97 -1.67,-0.84 -1.92,2.58 -1.44,2.81 -0.1,1.08 0.83,0.39 -1.08,0.4 -1.56,6.49 1.36,0.42 -1.08,1.07 0.57,2.52 1.28,1.45 -0.29,5.3 1.44,1.22 1.58,3.1 -0.51,-0.34 -0.8,0.95 0.91,0.56 0.86,-0.63 -0.24,1.11 0.51,0.14 0.55,-0.31 -0.44,-1.76 0.49,0.03 4.3,5.37 -0.66,4.47 -1.07,0.98 0.04,2.85 -1.6,-0.55 0.34,-2.86 -1.02,-0.44 -0.92,0.38 -0.75,1.72 0.87,1.09 -0.38,2.07 0.78,0.66 0.65,-0.45 0.06,0.72 -1.32,-0.13 -0.11,1.44 -2.41,-1.92 0,0 -0.6,-2.18 -1.99,-0.51 -0.64,-0.95 -0.33,-2.89 0.63,-1.24 -0.83,-1.08 -1.08,0.01 -1.46,1.29 -2.15,-0.17 -0.81,-1.05 -1.48,0.97 -2.29,-3.08 -6.7,-1.07 -2.2,0.78 -6.27,-0.08 -2.92,1.36 -0.74,2.22 -3.19,0.9 -2.01,1.9 -1.24,0.12 -0.71,-0.24 -0.43,-1.62 -2.1,-1.41 -5.7,0.38 -0.16,-1.49 0,0 -0.23,-1.03 -7.98,-4.28 0,-2.46 -1.42,0.85 -3.13,-1.16 0.59,-1.62 -0.41,-1.01 1.27,-1.02 -3,-1.12 -0.93,1.68 -1.36,-0.73 -0.24,1.27 -1.2,-0.22 -2.32,-1.95 0.96,-1.88 -0.87,-0.55 -1.61,0.32 0.38,-1.71 -0.79,-1.22 -2.87,-1.3 0.1,-1.3 -1.82,-0.48 -0.11,-0.68 -2.64,-0.59 -1.12,-2.35 -1.96,-1.92 -2.41,2.01 -0.51,-0.99 -1.49,-0.38 0.68,-1.91 -0.99,-1.49 1.3,-0.97 -0.96,-0.75 0.96,-2.57 -2.46,-1.13 -0.7,0.81 -0.83,-0.18 0.41,-1.98 -1.13,-11.75 11.09,-16.500005 0,0 2.68,1.66 -1.28,1.1 0.77,1.52 -2.18,4.030005 2.18,0.01 2.05,1.02 -0.65,1.13 1.49,0.93 1.49,-1.69 0.49,1.05 1.85,-2.66 0.44,1.17 1.64,-0.88 1.93,1.84 1.6,0.21 2.5,-3.37 -0.13,-3.600005 1.55,0.15 -0.6,-2.37 2.35,-2.83 0.87,-4.9 2.42,0.18 -0.02,-1.36 0.07,0.78 2.48,1.34 -0.35,-0.98 0.68,-1.54 1.29,-0.16 -0.37,-2.84 3.62,0.23 2.74,-2.26 2.15,-0.29 1.89,0.6 0.54,2.81 4.21,0.3 0.91,-1.87 -1.14,-2.02 0.73,-0.8 -0.73,-0.68 2.06,-0.6 -0.93,-1.54 0.01,-2.02 2.74,-0.87 0.67,0.77 0.74,-0.77 2.24,0.24 4.18,-1.46 1.71,-3.95 1.1,0.44 0.6,-1.6 -2.42,-2.22 0.79,-1.97 -1.21,-0.58 -0.64,0.41 -0.44,-1.94 -2.16,0.5 -0.79,-0.7 0.68,-1.89 -0.58,-1.41 -2.92,-2.43 2.36,-1.44 0.81,0.74 0.27,-3.66 2.3,-2.71 -0.59,-1.39 -3.08,-0.42 0.12,-1.65 4.87,-2.46 1.57,0.33 1.17,-1.18 1.16,-0.07 0.58,0.77 2.47,-3.92 -0.17,-1.48 1.52,-2.69 -0.31,-2.33 3.94,3.08 0.83,-0.29 1.55,0.98 0.11,2.26 3.34,-2.65 1.21,0.76 2.98,-0.94 0.75,0.89 1.26,-0.06 0.51,-0.46 -0.38,-1.32 0.87,0.2 1.67,-1.88 2.47,-0.92 0,0 1.41,-0.09 z"
title="Veneto"
id="IT-34" />
</g>
</svg>
</div>
<button id="btn" >Debug button</button>
我正在尝试创建可点击的地图。这个想法是点击一个区域会启动一个指向该特定区域的缩放动画。
到目前为止，我设法计算了每个包含 getBBox() 区域的 SVG 矩形的中心。这显示为紫色圆圈
现在我无法理解如何在特定坐标上缩放，根据我的想法，这与上一步计算的相同。
每次单击不同的 <path> 时，下面的代码基本上都会更新 <g id="italy" class="c"> 组元素的 transform-origin 样式 属性。
问题是如何缩放 SVG 并以特定坐标为中心？ 或者如何缩放 SVG 并仅将具有特定 ID 的路径居中？
.c {
fill: rebeccapurple;
transition: 1s;
fill-opacity: 0.7;
stroke: #000000;
stroke-width: 0.4px;
transform: scale(0.7);
}
.c-zoom{
transform: scale(2);
}
.d:hover {
fill-opacity: 1;
}
.map-container{
position: relative;
}
<html>
<head>
<title>test</title>
<link rel="stylesheet" href="test2.css">
</head>
<body>
<div class="map-container" id="map">
<svg
xmlns:mapsvg="http://mapsvg.com"
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:svg="http://www.w3.org/2000/svg"
xmlns="http://www.w3.org/2000/svg"
mapsvg:geoViewBox="6.624486 47.092916 18.521301 35.490303"
width="430"
height="515"
id="svg">
<g id="italy" class="c">
<circle id="circle" cx="121" cy="495" r="5"></circle>
<path class="d"
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title="Emilia-Romagna"
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title="Toscana"
id="IT-52" />
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title="Trentino-Alto Adige"
id="IT-32" />
<path class="d"
d="m 49.07021,82.450505 0.58,1.17 3.82,-0.54 0.91,1.48 1.32,0.54 0.64,1.93 1.6,-1.15 2.47,1.61 1.17,-0.66 2.07,0.73 0,0 0.7,4.06 -0.7,5.05 1.71,3.1 1.62,0.600005 0.36,1.2 -1.66,2.83 1.82,3.73 -1.2,0.24 -0.73,3.04 -1.01,-0.65 -2.64,0.2 -4.89,3.47 -0.68,-0.61 -2.32,0.38 -1.97,-1.3 -1.41,0.66 -0.13,-0.87 -2.01,-1.25 -2.08,1.13 -1.85,-0.47 -1.23,0.39 -0.93,1.57 -3.54,2.84 -0.96,-0.67 -1.88,0.89 -2.8,0.07 -2.39,3.01 -3.07,-1.07 -0.9,0.68 -0.36,-2.85 -1.77,3.56 0,0 -2.72,-0.39 0.27,-1.63 -2.79,-0.76 -0.23,-5.06 -0.95,-1 1.17,-3.79 -1.74,-1.05 -2.6,0.18 -0.52,-1.45 -2.45,-0.92 -2.5199999,-2.91 0.3699999,-1.2 -0.7599999,-2.950005 1.0099999,-4.14 1.19,-0.34 0.99,0.64 0.73,-1.19 1.79,0.62 1.49,-0.47 0.53,-1.03 2.31,-0.81 0.32,-2.06 2.06,-1.74 3.16,4.8 2.57,-1.55 1.86,1.5 1.24,-2.11 2.13,-0.06 1.83,-2.42 4.72,1.84 4.45,-2.8 -0.04,-0.99 1.35,-1.05 2.22,0.42 0.3,-2.13 z"
title="Valle d'Aosta"
id="IT-23" />
<path class="d"
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title="Veneto"
id="IT-34" />
</g>
</svg>
</div>
<button id="btn" >Debug button</button>
<script>
window.addEventListener("load",function(){
let ita = document.getElementById("italy");
let btn = document.getElementById("btn");
let regions = document.getElementsByClassName("d")
btn.addEventListener("click",(e)=>{
ita.classList.toggle("c-zoom")
})
for(r of regions){
r.addEventListener("click",(e)=>{
let childPos = e.target.getBBox();
const x = childPos.x + childPos.width/2
const y = childPos.y + childPos.height/2
const fin = x + "px " + y + "px"
console.log(fin)
document.getElementById("circle").setAttribute("cx", x);
document.getElementById("circle").setAttribute("cy", y);
ita.style['transform-origin'] = fin;
ita.classList.toggle("c-zoom")
})
}
},false)
</script>
</body>
</html>
除非我误解了问题，否则问题很可能来自动画 svg 视图框内的 g 元素。
transform-origin 和 class 切换整个 svg 也是如此。如果你走这条路线以获得流畅的动画，你可能需要添加一些 CSS 过渡，比如 transition: all ease-in-out .2s; on #svg 和 .c-zoom
IMO 你这里有三个主要问题。
缩放过程中的“摇摆”是由于您在缩放的同时移动了
transform-origin造成的。您可以通过确保只有转换受transition设置影响来解决此问题。transition: transform 1s;其次，因为元素已经有
scale(0.7)，当你用scale(2)替换它时，地图跳转。您可以通过将初始比例移动到父容器来解决这个问题。但是对于下面的示例，我刚刚删除了初始缩放。最后，我假设您真的想将区域放大到屏幕中间。当前方法的问题是您正在围绕新的变换原点进行缩放。所以该地区的中心保持原样。您可以通过调整计算出的 transform-origin 来解决此问题，以便该区域在缩放时向屏幕中心移动。
window.addEventListener("load",function(){
let ita = document.getElementById("italy");
let btn = document.getElementById("btn");
let regions = document.getElementsByClassName("d");
let centreX = 215;
let centreY = 257.5;
btn.addEventListener("click",(e)=>{
ita.classList.toggle("c-zoom")
})
for(r of regions){
r.addEventListener("click",(e)=>{
let childPos = e.target.getBBox();
const x = childPos.x + childPos.width/2
const y = childPos.y + childPos.height/2
// Calculate an origin offset that means that when scaled by "zoom",
// the point x,y ends up at the centre of the SVG.
const zoom = 2;
const dx = (x - centreX) / (zoom - 1);
const dy = (y - centreY) / (zoom - 1);
const fin = (x + dx) + "px " + (y + dy) + "px"
//console.log(fin)
document.getElementById("circle").setAttribute("cx", x);
document.getElementById("circle").setAttribute("cy", y);
ita.style['transform-origin'] = fin;
ita.classList.toggle("c-zoom")
})
}
},false)
.c {
fill: rebeccapurple;
transition: transform 1s;
fill-opacity: 0.7;
stroke: #000000;
stroke-width: 0.4px;
}
.c-zoom{
transform: scale(2);
}
.d:hover {
fill-opacity: 1;
}
.map-container{
position: relative;
}
svg {
border: solid 1px black;
}
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