The handler.preventExtensions() method is a trap for the [[PreventExtensions]] object internal method, which is used by operations such as Object.preventExtensions().

Learn what a hardened image is, why it matters, and how Docker Hardened Images offer stronger security, compliance, and operational efficiency.

Learn how Docker Hardened Images comply with SLSA Build Level 3 and how to verify provenance for secure, tamper-resistant builds.

Resolve common issues when building, running, or debugging Docker Hardened Images, such as non-root behavior, missing shells, and port access.

You can use Docker Hub to store software artifacts packaged as OCI artifacts.

The JavaScript warning "unreachable code after return statement" occurs when using an expression after a return statement, or when using a semicolon-less return statement but including an expression directly after.

The JavaScript exception "import declarations may only appear at top level of a module" occurs when an import declaration is not at the top level of a module. This might be because the import declaration is nested in other constructs (functions, blocks, etc.), or more often because the current file is not treated as a module.

The JavaScript exception "malformed URI sequence" occurs when URI encoding or decoding wasn't successful.

The JavaScript exception "octal escape sequences can't be used in untagged template literals or in strict mode code" occurs when octal escape sequences are used in strict mode string literals or untagged template literals.

A common trait that allows explicit creation of a duplicate value.