如何根据鼠标位置操作svg？

Question

我有一个SVG眼睛图像。并且我想动画虹膜和瞳孔根据鼠标的位置在眼球周围移动。我已经这样了：

HTML中的SVG：

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<svg id="face" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1152.31 1075.95">
                <defs><style>.cls-1,.cls-10,.cls-2,.cls-9{fill:none;stroke:#fff;}.cls-1,.cls-10,.cls-11,.cls-2,.cls-9{stroke-miterlimit:10;}.cls-1,.cls-11,.cls-12,.cls-3,.cls-4,.cls-5,.cls-6,.cls-7,.cls-8,.cls-9{fill-rule:evenodd;}.cls-3{fill:#1a52db;}.cls-4{fill:#223992;}.cls-5{fill:#fff;}.cls-6{fill:#fd5219;}.cls-8{fill:#d63319;}.cls-10,.cls-9{stroke-width:2px;}.cls-11{fill:#feae00;stroke:#feae00;}.cls-12{fill:#f15a24;}
                </style></defs>
<g id="left-eye">
<path id="left-white" class="cls-5" d="M626,288.2a4.6,4.6,0,0,0,1.4,3c5.73,6.09,26.18,28.7,46.41,34.32a228.21,228.21,0,0,0,48.8,8.12s32.21-2.36,49.31-8.5,34.19-12.28,39.36-15.45.4-13.29.4-13.29S788.13,270,765.4,261.78c-15.06-5.44-25-10.73-53.78-11.59-15-.45-38.06,4.59-56.21,13.28-11.35,5.44-20,13.24-25.94,19.18C626.71,285.4,626.08,286.72,626,288.2Z" transform="translate(-415.19 -6.14)"/>
<path id="left-iris" class="cls-3" d="M676.54,281.74s7.91-29.74,39.16-37.39,47.08,28.14,47.08,28.14,1.62,18.56-2.78,27.65S747.38,322.89,738.26,325c-3.87.89-16.62,2.76-27.28-.82-14.45-4.86-27.27-16.13-29.63-19.59C677.14,298.4,676,287.94,676.54,281.74Z" transform="translate(-415.19 -6.14)"/>
<path id="left-pupil" class="cls-7" d="M710.77,295.47c-3.51-5.52-5.1-13.7-3.19-16.35s7.64-9.7,13.15-9.54,17.26,3.21,18.82,14.89a2.11,2.11,0,0,1,0,.26c.1,1.13,1.14,9.85-2.22,12.44-5.64,4.35-13,3.22-13,3.22S713.2,299.3,710.77,295.47Z" transform="translate(-415.19 -6.14)"/>
</g>
</svg> 

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和JS：

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const leftPupil = document.getElementById("left-pupil");
document.addEventListener("mousemove", function(e){
    let x = e.clientX;
    let y = e.clientY;
    leftPupil.setAttribute('transform', `translate(-${x},-${y})`);
});

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并且瞳孔在运动，但我不知道如何使它只在特定的场（一个眼球）上运动。

Answer 1

1. 您已经在路径上使用了转换来进行初始放置。建议将其包装在G中，并将转换移动到那里。
2. 您可以使用ATAN2确定指针到眼球的角度，然后使用单位圆设置正确的转换

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const leftPupil = document.getElementById("left-pupil");
document.addEventListener("mousemove", function(e){
    let x = e.clientX;
    let y = e.clientY;
    const pupilRect = leftPupil.getBoundingClientRect();
    const radius = 8;
    const angle = Math.atan2(y-pupilRect.top,x-pupilRect.left)+Math.PI;
    leftPupil.setAttribute('transform', `translate(${-radius*Math.cos(angle)},${-radius*Math.sin(angle)})`);
});

<svg viewBox="0 0 500 500" width="200" height="200">
<g id="left-eye">
<path id="left-white" class="cls-5" fill="white" stroke="black" stroke-width="3" d="M626,288.2a4.6,4.6,0,0,0,1.4,3c5.73,6.09,26.18,28.7,46.41,34.32a228.21,228.21,0,0,0,48.8,8.12s32.21-2.36,49.31-8.5,34.19-12.28,39.36-15.45.4-13.29.4-13.29S788.13,270,765.4,261.78c-15.06-5.44-25-10.73-53.78-11.59-15-.45-38.06,4.59-56.21,13.28-11.35,5.44-20,13.24-25.94,19.18C626.71,285.4,626.08,286.72,626,288.2Z" transform="translate(-415.19 -6.14)"/>
<path id="left-iris" class="cls-3" d="M676.54,281.74s7.91-29.74,39.16-37.39,47.08,28.14,47.08,28.14,1.62,18.56-2.78,27.65S747.38,322.89,738.26,325c-3.87.89-16.62,2.76-27.28-.82-14.45-4.86-27.27-16.13-29.63-19.59C677.14,298.4,676,287.94,676.54,281.74Z"
fill="brown" stroke="black" stroke-width="3" 
transform="translate(-415.19 -6.14)"/>
<g transform="translate(-415.19 -6.14)">
<path id="left-pupil" class="cls-7" d="M710.77,295.47c-3.51-5.52-5.1-13.7-3.19-16.35s7.64-9.7,13.15-9.54,17.26,3.21,18.82,14.89a2.11,2.11,0,0,1,0,.26c.1,1.13,1.14,9.85-2.22,12.44-5.64,4.35-13,3.22-13,3.22S713.2,299.3,710.77,295.47Z" />
</g>
</g>
</svg>