puppeteer执行js

Hi guys! Today let's look at another powerful function of the puppeteer API using Node.js part 2.

嗨，大家好！ 今天，让我们看看使用Node.js第2部分的puppeteer API的另一个强大功能。

In the first part of this section, was talking about commands for keystroke control and typing as we'll normally do with an opened browser.

在本节的第一部分中，我们将讨论键盘控制和键入的命令，就像我们通常在打开的浏览器中所做的那样。

Here's the link to part 1:

这是第1部分的链接：

Imagine for a moment if it's possible to open a website, log in and take a screenshot of your dashboard.

想象一下，如果有可能打开一个网站，登录并为您的仪表板截屏。

?????

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Take Note! You should have Node-js and puppeteer installed in your PC.

做记录！ 您应该在PC中安装Node-js和puppeteer。

With Node-js and puppeteer already up and running, let's get started.

在Node-js和puppeteer已启动并运行的情况下，让我们开始吧。

*NB: If you don't yet have Node-js/ puppeteer installed in your PC, read the article NODE & GOOGLE PUPPETEER API SERIES

*注意：如果您的PC尚未安装Node-js / puppeteer，请阅读文章NODE＆GOOGLE PUPPETEER API SERIES

Today, let's continue from our last part where we saw how to type o fill the form.

今天，让我们从最后一部分继续，在那里我们看到了如何键入o填写表格。

Now let's see how to submit..

现在让我们看看如何提交。

But there's a problem!!!! Most often, the submit button has no id or class.

但是有一个问题！ 通常，提交按钮没有ID或类。

Indeed, the puppeteer has made work easy for you and me.

的确，木偶使您和我的工作变得轻松。

Let's see how this can be done.

让我们看看如何做到这一点。

Now, let's get started.

现在，让我们开始吧。

Since we can't get the id or class of the submit button from inspecting, we will use a command on the web browser's console which will return what we'll use at the place of id/class.

由于无法通过检查获取提交按钮的ID或类，因此我们将在Web浏览器的控制台上使用命令，该命令将返回我们将在ID /类位置使用的命令。

Open your browser, move to the console and type

打开浏览器，移至控制台并输入

document.querySelectorAll('input[type="submit"]') [0]

It's going to output the input type and value of your own submit button.

将输出您自己的提交按钮的输入类型和值。

Use the input type at the await.page.click parameter as seen in the code below.

使用await.page.click参数中的输入类型，如下面的代码所示。

Open a text editor and type the following code and save it with the file name app.js:

打开一个文本编辑器，输入以下代码，并将其保存为文件名app.js ：

The code below fills the form and submits and takes a screenshot of action after submitting.

下面的代码填写了表单，然后提交并在提交后对操作进行了截图。

const puppeteer = require('puppeteer');(async () => {
   	const browser = await puppeteer.launch()	const page = await browser.newPage()	await page.goto('file:///H:/js-form-validator-master/index.html')	// focus on the element with id  specified in bracket	await page.focus('#example-1-name') 	// types the sentence in bracket 	await page.keyboard.type('ENGINEER GODWILL') 	await page.focus('#example-1-email') 	await page.keyboard.type('')	await page.focus('#example-1-password')	await page.keyboard.type('admin123')	// clicks on the submit button of the form	await page.click ('input[type="submit"]') 	// captures a screenshot	await page.screenshot({
    path: 'keyboard.png' }) 	console.log ('done');	await browser.close()})()

NB: You can use any URL of your choice,

注意：您可以使用任何选择的URL，

I this example, I used a webpage that was already downloaded to facilitate the tutorial but if it concerns a URL on the www, internet connection is required to navigate to the website/web page.

在本示例中，我使用已经下载的网页来简化本教程，但是如果它涉及www上的URL，则需要互联网连接才能导航到该网站/网页。

The file should be saved in your default Node-js directory.

该文件应保存在默认的Node-js目录中。

Run the code by initiating the file at the command prompt like a regular Node-js file.

通过在命令提示符处启动文件(如常规Node-js文件)来运行代码。

The Screenshot ( image file) is then stored in the default Node-js directory with name keyboard.png

屏幕快照(图像文件)然后存储在名称为keyboard.png的默认Node-js目录中。

Output image file:

输出图像文件：

翻译自:

puppeteer执行js