js将base64保存到本地

function downloadBase64Image(base64Data, fileName) {
    const link = document.createElement('a');
    link.href = base64Data;
    link.download = fileName;
    document.body.appendChild(link);
    link.click();
    document.body.removeChild(link);
}

// 使用示例
const base64Image = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUA...'; // 替换为实际的Base64编码
downloadBase64Image(base64Image, 'image.png');

function downloadBase64Image(base64Data, fileName) {
    const byteCharacters = atob(base64Data.split(',')[1]);
    const byteNumbers = new Array(byteCharacters.length);
    for (let i = 0; i < byteCharacters.length; i++) {
        byteNumbers[i] = byteCharacters.charCodeAt(i);
    }
    const byteArray = new Uint8Array(byteNumbers);
    const blob = new Blob([byteArray], {type: 'image/png'});
    const url = URL.createObjectURL(blob);
    const link = document.createElement('a');
    link.href = url;
    link.download = fileName;
    document.body.appendChild(link);
    link.click();
    document.body.removeChild(link);
    URL.revokeObjectURL(url);
}

// 使用示例
const base64Image = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUA...'; // 替换为实际的Base64编码
downloadBase64Image(base64Image, 'image.png');