是的，你可以用HTML2Canvas库它渲染你的HTML代码到画布。 它提供了将html从特定div转换为图像的选项，然后使用canvas2image将图像本地下载到您的文件系统中。

链接源代码

    html2canvas(document.querySelector('#screenscoot'), {
        onrendered: function(canvas) {
            // document.body.appendChild(canvas);
          return Canvas2Image.saveAsPNG(canvas);
        }
    });

是的，你可以用HTML2Canvas库它渲染你的HTML代码到画布。 它提供了将html从特定div转换为图像的选项，然后使用canvas2image将图像本地下载到您的文件系统中。

链接源代码

    html2canvas(document.querySelector('#screenscoot'), {
        onrendered: function(canvas) {
            // document.body.appendChild(canvas);
          return Canvas2Image.saveAsPNG(canvas);
        }
    });

你可以添加引用HtmlRenderer到你的项目，并执行以下操作:

string htmlCode ="<p>This is a sample html.</p>";
Image image = HtmlRender.RenderToImage(htmlCode ,new Size(500,300));

使用剧作家的page.screen()可以非常容易地截取屏幕截图。例如使用Python(但它也适用于Node.js, Java和.NET):

from playwright.async_api import async_playwright

async with async_playwright() as p:
     browser = await p.chromium.launch()
     page = await browser.new_page()
     await page.goto('https://google.com')
     await page.screenshot(path=f'screenshot.png')
     await browser.close()

你可以使用像wkhtmltopdf这样的HTML转PDF工具。然后你可以使用像imagemagick这样的PDF图像工具。不可否认，这是服务器端，一个非常复杂的过程…

仅用JavaScript无法100%准确地做到这一点。

有一个Qt Webkit工具，还有一个python版本。如果你想自己做，我已经成功地用可可:

[self startTraverse:pagesArray performBlock:^(int collectionIndex, int pageIndex) {

    NSString *locale = [self selectedLocale];

    NSRect offscreenRect = NSMakeRect(0.0, 0.0, webView.frame.size.width, webView.frame.size.height);
    NSBitmapImageRep* offscreenRep = nil;      

    offscreenRep = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes:nil
                                             pixelsWide:offscreenRect.size.width
                                             pixelsHigh:offscreenRect.size.height
                                             bitsPerSample:8
                                             samplesPerPixel:4
                                             hasAlpha:YES
                                             isPlanar:NO
                                             colorSpaceName:NSCalibratedRGBColorSpace
                                             bitmapFormat:0
                                             bytesPerRow:(4 * offscreenRect.size.width)
                                             bitsPerPixel:32];

    [NSGraphicsContext saveGraphicsState];

    NSGraphicsContext *bitmapContext = [NSGraphicsContext graphicsContextWithBitmapImageRep:offscreenRep];
    [NSGraphicsContext setCurrentContext:bitmapContext];
    [webView displayRectIgnoringOpacity:offscreenRect inContext:bitmapContext];
    [NSGraphicsContext restoreGraphicsState];

    // Create a small + large thumbs
    NSImage *smallThumbImage = [[NSImage alloc] initWithSize:thumbSizeSmall];  
    NSImage *largeThumbImage = [[NSImage alloc] initWithSize:thumbSizeLarge];

    [smallThumbImage lockFocus];
    [[NSGraphicsContext currentContext] setImageInterpolation:NSImageInterpolationHigh];  
    [offscreenRep drawInRect:CGRectMake(0, 0, thumbSizeSmall.width, thumbSizeSmall.height)];  
    NSBitmapImageRep *smallThumbOutput = [[NSBitmapImageRep alloc] initWithFocusedViewRect:CGRectMake(0, 0, thumbSizeSmall.width, thumbSizeSmall.height)];  
    [smallThumbImage unlockFocus];  

    [largeThumbImage lockFocus];  
    [[NSGraphicsContext currentContext] setImageInterpolation:NSImageInterpolationHigh];  
    [offscreenRep drawInRect:CGRectMake(0, 0, thumbSizeLarge.width, thumbSizeLarge.height)];  
    NSBitmapImageRep *largeThumbOutput = [[NSBitmapImageRep alloc] initWithFocusedViewRect:CGRectMake(0, 0, thumbSizeLarge.width, thumbSizeLarge.height)];  
    [largeThumbImage unlockFocus];  

    // Write out small
    NSString *writePathSmall = [issueProvider.imageDestinationPath stringByAppendingPathComponent:[NSString stringWithFormat:@"/%@-collection-%03d-page-%03d_small.png", locale, collectionIndex, pageIndex]];
    NSData *dataSmall = [smallThumbOutput representationUsingType:NSPNGFileType properties: nil];
    [dataSmall writeToFile:writePathSmall atomically: NO];

    // Write out lage
    NSString *writePathLarge = [issueProvider.imageDestinationPath stringByAppendingPathComponent:[NSString stringWithFormat:@"/%@-collection-%03d-page-%03d_large.png", locale, collectionIndex, pageIndex]];
    NSData *dataLarge = [largeThumbOutput representationUsingType:NSPNGFileType properties: nil];
    [dataLarge writeToFile:writePathLarge atomically: NO];
}];

希望这能有所帮助!