CodeQL library for JavaScript/TypeScript
codeql/javascript-all 2.3.1-dev (changelog, source)
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Predicate ClientSideUrlRedirect::isPrefixExtraction

Holds if node extracts a part of a URL that does not contain the suffix.

Import path

import semmle.javascript.security.dataflow.ClientSideUrlRedirectCustomizations
predicate isPrefixExtraction(MethodCallNode node)