Netsparker - Netsparker is a tool for scanning web sites for security vulnerabilities.
JavaScript.com - A free resource for learning and developing in JavaScript
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BundlePhobia - Find the performance impact of adding a npm package to your bundle.
Checkmarx - The industry’s most comprehensive AppSec platform, Checkmarx One is fast, accurate, and accelerates your business.
JavaScript Operator Lookup - A full list of JavaScript operators with examples