JavaScript syntax: Difference between revisions

Revision as of 23:08, 9 November 2020

Revision as of 00:19, 10 November 2020

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===eval (expression) ===

Evaluates expressionthe stringfirst parameter as an expression, which can include assignment statements. Variables local to functions can be referenced by the expression. However, the {{code|eval}} represents a major security risk, as it allows a bad actor to execute arbitrary code, and so its use is discouraged.<ref name="deve_eval">{{Cite web |title=eval() |work=MDN Web Docs |access-date=29 January 2020 |url= https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/eval#Never_use_eval!}}</ref>

<syntaxhighlight lang="javascript">

(function foo() {