HTML Script, Stylesheet, and Resource Loading Cheat Sheet
Load and embed classic scripts, JavaScript modules, stylesheets, fonts, resource hints, priority hints, and deferred embeds with predictable execution and fallback behavior.
Open cheat sheetPractical developer reference
Find the syntax.
Understand the example.
Straightforward cheat sheets up front, complete explanations underneath, and local code playgrounds when the browser can run them safely.
No sign-upNo trackingCode runs locally
# CSS Flexbox
display: flex;
gap: 1rem;
flex-wrap: wrap;
# Python lists
items.append(value)
items[start:stop]Browse by topic
Six focused categories
HT
HTML
Semantic markup, forms, accessibility, and document structure.
48 articles · 6 subcategories CSCSS
Layouts, responsive design, selectors, and visual styling.
48 articles · 6 subcategories PYPython
Practical language patterns, collections, functions, and tooling.
53 articles · 7 subcategories SQSQL
Queries, joins, aggregation, filtering, and data updates.
48 articles · 6 subcategories LILinux
Shell commands, files, processes, networking, and permissions.
48 articles · 6 subcategories WIWindows
PowerShell, system administration, files, and troubleshooting.
58 articles · 7 subcategoriesStart here
Featured cheat sheets
Two recently updated references from every category. Browse a category or use search to reach the full library.
File System Access and Origin-Private Storage Cheat Sheet
Work safely with user-chosen files, directories, writable streams, permissions, OPFS, worker sync handles, quotas, and cleanup.
Open cheat sheetCSS Animation Composition and Easing Cheat Sheet
Combine animations with replace, add, and accumulate, coordinate animation lists, design cubic-bezier(), steps(), and linear() easing, and reduce motion.
Open cheat sheetCSS aspect-ratio and Replaced Elements Cheat Sheet
Reserve stable media space, size responsive cards, reconcile natural dimensions with aspect-ratio, object-fit, min/max constraints, and accessible content.
Open cheat sheetPandas Data Cleaning and Missing Data Cheat Sheet
Detect missing values, normalize text, convert dtypes, validate values, and remove duplicate pandas records without hiding data quality problems.
Open cheat sheetPandas DataFrames and Indexing Cheat Sheet
Create, inspect, select, filter, update, sort, and index pandas DataFrames with explicit, Copy-on-Write-safe patterns.
Open cheat sheetPostgreSQL Deadlocks, Timeouts, and Cancellation Cheat Sheet
Prevent and diagnose PostgreSQL blocking with consistent lock order, bounded transactions, timeout scopes, wait graphs, cancellation, and safe retries.
Open cheat sheetPostgreSQL LATERAL Joins and Set-Returning Functions Cheat Sheet
Write PostgreSQL LATERAL and set-returning-function queries for top-N lookups, JSON, arrays, time series, optional expansion, and efficient plans.
Open cheat sheetext4, XFS, and Filesystem Repair Cheat Sheet
Inspect, check, and safely repair ext4 and XFS filesystems with mount-state verification, backups, e2fsck, xfs_repair, recovery planning, and diagnostics.
Open cheat sheetLinux Capabilities and File Attributes Cheat Sheet
Audit and manage Linux process capabilities, file capabilities, securebits, systemd bounding sets, extended attributes, and immutable or append-only flags.
Open cheat sheetDiskPart BIOS/MBR Windows Partitioning Cheat Sheet
Create and verify legacy BIOS/MBR Windows layouts with DiskPart, including active system, Windows, recovery, extended, and logical partitions.
Open cheat sheetDiskPart Clean, Clean All, GPT, and MBR Conversion Cheat Sheet
Wipe partition metadata with DiskPart clean or clean all, convert empty disks between GPT and MBR, verify targets, and choose MBR2GPT when data must remain.
Open cheat sheetDesigned for scanning
Quick when you need it.
Detailed when you want it.
- 01
Scan the essentials
Start with a compact table of copy-ready syntax and plain-language summaries.
- 02
Jump to an example
Every quick-reference row links directly to its complete explanation and examples.
- 03
Try it locally
Compatible topics include sandboxed playgrounds that keep your code in the browser.