[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) ## matchers.strings.StringPrefix class 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 export declare class StringPrefix extends AnyMatcher ``` **Extends:** AnyMatcher ## Constructors

Constructor	Modifiers	Description
[(constructor)(prefix, suffix)](./case-definition-dsl.matchers.strings.stringprefix._constructor_.md)		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)

## Methods

Method	Modifiers	Description
[toJSON()](./case-definition-dsl.matchers.strings.stringprefix.tojson.md)		For non-TypeScript implementations (see `AnyMatcher.toJSON`)