@mt-kit/utils/dist/image-url-to-base64/index.js

一个常用的工具库

/**
 * 将图像 URL 转换为 base64 编码的字符串
 * @param url 是要转换的图像的 URL
 * @param mineType 是可选参数，用于指定生成的 base64 字符串的 MIME 类型，默认为 image/png
 * @returns 返回一个 Promise 对象，resolve 后的值是生成的 base64 编码的字符串
 */
export default function imageUrlToBase64(url, mineType) {
    return new Promise((resolve, reject) => {
        let canvas = document.createElement("CANVAS");
        const ctx = canvas === null || canvas === void 0 ? void 0 : canvas.getContext("2d");
        const img = new Image();
        img.crossOrigin = "";
        img.addEventListener("load", () => {
            if (!canvas || !ctx) {
                return reject(new Error("Canvas or context is not available"));
            }
            canvas.height = img.height;
            canvas.width = img.width;
            ctx.drawImage(img, 0, 0);
            const dataUrl = canvas.toDataURL(mineType || "image/png");
            canvas = null;
            resolve(dataUrl);
        });
        img.src = url;
    });
}
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