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Nashorn implements number of syntactic and API extensions as well. This page describes syntax and API extensions of nashorn implementation. A number of syntax and API extensions are enabled only when scripting mode is enabled. Scripting mode is turned on by nashorn option "-scripting". Whenever a syntax or an API extension is available only in -scripting mode, it is noted so in this document.

Conditional catch clauses

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For shebang nashorn scripts, -scripting mode is automatically enabled.

Switching off syntax extensions

Nashorn option --no-syntax-extensions (or it's short form -nse) can be used to switch off syntax extensions of nashorn. With syntax extensions switched off, only ECMAScript standard syntax is supported. Note that even when -scripting mode is on, -nse switches off scripting syntax extensions as well. Also note that API extensions are still enabled even -nse is specified.

Nashorn script API extensions

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