CSS Selectors Knowledgebase

CSS Selectors are a powerful way to select and manipulate elements in HTML documents. It's the leading technology in web scraped HTML parsing as it's relatively simple, fast and known by most web developers.

The main competitor to CSS Selectors is XPath, which is more powerful but also more complex. CSS Selectors are widely used in web scraping libraries like BeautifulSoup, Scrapy, and Puppeteer.

Most programming languages have libraries that support CSS Selectors, making it a versatile tool for web scraping and data programming.

See below for more on CSS Selectors in the context of web scraping and data programming 👇

How to use CSS Selectors in Nim ?

how to parse HTML using CSS selectors in Nim programming language using either CSS3Selectors or nimquery libraries.

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How to select elements by attribute using CSS selectors?

To select elements by attribute the powerful attribute selector can be used which has several selection options. Here's how.

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How to select elements by class using CSS selectors?

To select elements by class the .class selector can be used. To select by exact class value the [class="exact value"] can be used instead. Here's how.

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How to select elements by ID using CSS selectors?

To select elements that contain an ID the #id selector can be used. To select elements by exact ID the [id="some value"] can be used. Here's how.

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How to select following siblings using CSS selectors?

To select following sibling elements using CSS selectors the + and ~ operators can be used. Here's how.

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Is it possible to select preceding siblings using CSS selectors?

It's not possible to select preceding sibling directly but there are easy alternatives that can be implemented to select preceding siblings.

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What are devtools and how they're used in web scraping?

Developer tools suite is used in web development but can also be used in web scraping to understand how target websites work. Here's how to use it.

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XPath vs CSS selectors: what's the difference?

CSS selectors and XPath are both path languages for HTML parsing. Xpath is more powerful but CSS is more approachable - which is one is better?

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