Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
2.2k views
in Technique[技术] by (71.8m points)

How to click on element with text in Puppeteer

Is there any method (didn't find in API) or solution to click on element with text?

For example I have html:

<div class="elements">
    <button>Button text</button>
    <a href=#>Href text</a>
    <div>Div text</div>
</div>

And I want to click on element in which text is wrapped (click on button inside .elements), like:

Page.click('Button text', '.elements')
Question&Answers:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

Short answer

This XPath expression will query a button which contains the text "Button text":

const [button] = await page.$x("//button[contains(., 'Button text')]");
if (button) {
    await button.click();
}

To also respect the <div class="elements"> surrounding the buttons, use the following code:

const [button] = await page.$x("//div[@class='elements']/button[contains(., 'Button text')]");

Explanation

To explain why using the text node (text()) is wrong in some cases, let's look at an example:

<div>
    <button>Start End</button>
    <button>Start <em>Middle</em> End</button>
</div>

First, let's check the results when using contains(text(), 'Text'):

  • //button[contains(text(), 'Start')] will return both two nodes (as expected)
  • //button[contains(text(), 'End')] will only return one nodes (the first) as text() returns a list with two texts (Start and End), but contains will only check the first one
  • //button[contains(text(), 'Middle')] will return no results as text() does not include the text of child nodes

Here are the XPath expressions for contains(., 'Text'), which works on the element itself including its child nodes:

  • //button[contains(., 'Start')] will return both two buttons
  • //button[contains(., 'End')] will again return both two buttons
  • //button[contains(., 'Middle')] will return one (the last button)

So in most cases, it makes more sense to use the . instead of text() in an XPath expression.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...