feat: create type for the parser options

src/parser.ts

@@ -14,7 +14,15 @@ import { parse, StackFrame as ESFrame } from 'error-stack-parser-es'
 
 import debug from './debug.js'
 import { SourceFile } from './source_file.js'
-import type { Chunk, ParsedError, Parser, SourceLoader, StackFrame, Transformer } from './types.js'
+import type {
+  Chunk,
+  Parser,
+  StackFrame,
+  Transformer,
+  ParsedError,
+  SourceLoader,
+  YouchParserOptions,
+} from './types.js'
 
 /**
  * ErrorParser exposes the API to parse an thrown value and extract
@@ -81,7 +89,7 @@ export class ErrorParser {
    */
   #transformers: Transformer[] = []
 
-  constructor(options?: { offset?: number; frameSourceBuffer?: number }) {
+  constructor(options?: YouchParserOptions) {
     options = options ?? {}
     this.#offset = options.offset
   }

src/types.ts

@@ -120,3 +120,22 @@ export type Parser = (source: unknown) => any
  * error value.
  */
 export type Transformer = (error: ParsedError, source: unknown) => void | Promise<void>
+
+/**
+ * Options accepted by the Youch parser
+ */
+export type YouchParserOptions = {
+  /**
+   * Define the offset to skip certain stack frames from
+   * the top
+   */
+  offset?: number
+
+  /**
+   * Number of lines of code to display for the error stack frame.
+   * For example: If you set the frameSourceBuffer=7, then 3 lines
+   * above the error line and 3 lines after the error line will
+   * be displayed.
+   */
+  frameSourceBuffer?: number
+}