Question

I m New at artwright and I m a Little uck. I m 拆解一个有大量回击和 Java字的场所。我想,我 par的逻辑是等到页标题充满特殊价值时,这就会表明,该页的负荷足够平。

这里是我守则的相关部分。

        with sync_playwright() as pw_firefox:
            browser = pw_firefox.firefox.launch(headless=True, timeout=self.timeout)
            context = browser.new_context(viewport={"width": 1920, "height": 1080},
                                          extra_http_headers=HEADERS,
                                          strict_selectors=False)
            page = context.new_page()

            # Go to url and wait for the page to load
            page.goto(final_url)
            html = page.content()

Is there a way to use the wait_for_selector() or wait_for_function() methods to get playwright to wait until the <title> is populated with a specific value? Thanks!

Answer 1

我不敢肯定,在标题改动之前,是否一定会阻碍确定网站载荷供您使用,但这里要说明如何在4秒后更改其标题的典型网页上:

from playwright.sync_api import expect, sync_playwright  # 1.40.0


sample_html = """<!DOCTYPE html><html><head>
<title>original title</title></head><body><script>
setTimeout(() => document.title = "new title", 4000);
</script></body></html>"""

with sync_playwright() as p:
    browser = p.chromium.launch()
    page = browser.new_page()
    page.set_content(sample_html)
    print(page.title())  # => original title
    page.wait_for_function( document.title === "new title" )
    print(page.title())  # => new title
    browser.close()

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