Sélecteur de chemin SVG en HTML utilisant React

Question

我正在创建一个绘画应用程序，用户可以在其中上传 SVG。填充不同的颜色，在 SVG 上绘制，然后将其擦除。 但不幸的是，我无法获取 SVG 的路径。 下面是 SVG 图像，如果我将鼠标悬停，我只想获取该悬停路径的路径并用所选颜色填充它。 我尝试了 Canvas 和 SVG 路径。但没有运气。 Canvas 有 beginPath 方法，我用它来绘制 SVG。

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Answer 1

J'ai créé une petite démo en utilisant votre SVG :

• HTML : permet aux utilisateurs de sélectionner des couleurs à l'aide de .
• CSS : dans body 中创建一个 CSS 自定义属性来保存所选颜色：--svg-fill-color.
• Inline JS : enregistrez la couleur sélectionnée dans --svg-fill-color.
• JS : pour chaque SVG path 分配一个 mousedown eventListener.
• JS : En cliquant sur path (mousedown), attribuez la valeur de path（mousedown）时，将--svg-fill-color的值赋给 >使用函数setColor(..)填充路径 à >remplissez-le à l'aide de la fonction setColor(..) La couleur du chemin.

Une démo assez simple que vous pouvez étendre à tout ce dont vous avez besoin.

Remarque : Les couleurs ne sont pas enregistrées lorsque la page est fermée, vous devez faire attention à : la réécriture du SVG, le stockage des valeurs dans le stockage local, etc.

Mise à jour dans le code après le commentaire "herrstrietzel".

// Javascript

// Get reference to all 'path'
const paths = document.querySelectorAll('svg path');

const setColor = (element) => {
    // Assign currently selected color in --svg-fill-color to 'fill' of clicked 'path'
    element.style.fill = getComputedStyle(document.body).getPropertyValue("--svg-fill-color");
};

// Assign event listener to all 'path'
paths.forEach((path, index)=>{
    // Executes 'setColor(..)' when path is clicked
    path.addEventListener("click", (event) => { setColor(event.target) });
});

/* CSS */

body { --svg-fill-color: black } /* default black */

<!-- HTML -->

<label for="color">
    <input id="color" type="color"
           oninput="document.body.style.setProperty('--svg-fill-color', this.value);">
    Path Color
</label>

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