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How-to

Short answers to one job at a time.

How-to8 min read

How to Extract Headings from a Web Page

Extract page headings in document order with JavaScript, Chrome DevTools, or a repeatable script. Learn how to include ARIA headings and handle dynamic pages.

How-to11 min read

How to Generate Visuals with n8n

Generate, edit, and route images in n8n with OpenAI, the Edit Image node, or another provider’s API. Includes setup, working workflow patterns, and fixes for common failures.

How-to10 min read

Can You Use XPath Selectors in Cheerio?

Cheerio uses CSS selectors, not XPath. Learn which XPath queries translate cleanly, how to rewrite them with Cheerio, and when to choose another tool.

How-to10 min read

How to Get the File Type of a URL in Python

Use Python’s mimetypes module for an offline extension guess, or inspect HTTP Content-Type for the live resource. Learn how to handle redirects, compressed files, and unknown types.

How-to10 min read

How to Generate Link Preview Images

Create a share image, publish it at a public URL, and point your page’s Open Graph metadata to it. This guide covers static images, dynamic generation, validation, and common failures.