有多种方法可以做到这一点：
1.在上下文中。Playwright的Browser.new_context方法接受一个viewport参数，可以在PLAYWRIGHT_CONTEXTS设置中使用：

# settings.py
PLAYWRIGHT_CONTEXTS = {
    "default": {
        "viewport": {
            "width": 19200,
            "height": 1080,
        },
    },
}

1.在页面中。您可以从页面初始化回调调用Page.set_viewport_size：

async def init_page(page, request):
    await page.set_viewport_size({"width": 19200, "height": 1080})

yield scrapy.Request(
    url="https://example.org",
    meta={
        "playwright": True,
        "playwright_page_init_callback": init_page,
    },
)

1.在页面中，使用PageMethod：

from scrapy_playwright.page import PageMethod

yield scrapy.Request(
    url="https://example.org",
    meta={
        "playwright": True,
        "playwright_page_methods": [
            PageMethod("set_viewport_size", {"width": 19200, "height": 1080}),
        ],
    },
)