[Home](./index.md) > [@contract-case/case-definition-dsl](./case-definition-dsl.md) > [matchers](./case-definition-dsl.matchers.md) > [strings](./case-definition-dsl.matchers.strings.md) > [StringPrefix](./case-definition-dsl.matchers.strings.stringprefix.md) > [(constructor)](./case-definition-dsl.matchers.strings.stringprefix._constructor_.md) ## matchers.strings.StringPrefix.(constructor) Matches any string that begins with the given constant string prefix, and ends with a matchable suffix. At match time, the actual string is checked for the constant prefix, and then the rest of the string is passed to the suffix matcher.. The suffix matcher must be expecting a string. See also [StringSuffix](./case-definition-dsl.matchers.strings.stringsuffix.md) **Signature:** ```typescript constructor(prefix: string, suffix: AnyStringMatcher); ``` ## Parameters

Parameter	Type	Description
prefix	string	The prefix string. Must be a string and not a matcher
suffix	AnyStringMatcher	A string or matcher to match against the suffix.