SVG path selector in HTML using 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

I created a small demo using your SVG:

• HTML: Enables the user to select a color using .
• CSS: Create a CSS custom property in body to hold the selected color: --svg-fill-color.
• Inline JS: Save the selected color in --svg-fill-color.
• JS: Assign a mousedown eventListener to each SVG path.
• JS: When path(mousedown) is clicked, assign the value of --svg-fill-color to >Use functionsetColor(..)Fill the color of path.

A fairly simple demo that you can extend to anything you need.

Note: Colors are not saved when the page is closed, you need to pay attention to: rewriting SVG, storing values ​​in local storage, etc.

Update In the code after the "herrstrietzel" comment.

// 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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