Select direct descendants with the child combinator
By now, you surely know how to select elements by type, class, or ID. However, there are cases where these selectors won't work, for example, if you only want to extract direct descendants of the top ul
element. For that, you will use the child combinator (>
) introduced in the video.
Here, your goal is to scrape a list (contained in the languages_html
document) of all mentioned computer languages, but without the accompanying information in the sub-bullets:
<ul id = 'languages'>
<li>SQL</li>
<ul>
<li>Databases</li>
<li>Query Language</li>
</ul>
<li>R</li>
<ul>
<li>Collection</li>
<li>Analysis</li>
<li>Visualization</li>
</ul>
<li>Python</li>
</ul>
Cet exercice fait partie du cours
Web Scraping in R
Exercice interactif pratique
Essayez cet exercice en complétant cet exemple de code.
# Extract the text of all list elements
languages_html %>%
___ %>%
___