Node.js Puppeteer：如何提交表单

使用puppeteer，如何以编程方式提交表单？到目前为止，如果表单实际上包含提交输入，我可以使用page.click('.input[type="submit"]')来完成这项工作.但对于不包含提交输入的表单，关注表单文本输入元素并使用page.press('Enter')似乎并不会导致表单提交:

const puppeteer = require('puppeteer');

(async() => {

    const browser = await puppeteer.launch();
    const page = await browser.newPage();
    await page.goto('https://stackoverflow.com/', {waitUntil: 'load'});
    console.log(page.url());

    // Type our query into the search bar
    await page.focus('.js-search-field');
    await page.type('puppeteer');

    // Submit form
    await page.press('Enter');

    // Wait for search results page to load
    await page.waitForNavigation({waitUntil: 'load'});


    console.log('FOUND!', page.url());

    // Extract the results from the page
    const links = await page.evaluate(() => {
      const anchors = Array.from(document.querySelectorAll('.result-link a'));
      return anchors.map(anchor => anchor.textContent);
    });
    console.log(links.join('\n'));
    browser.close();

})();