Make error classes public.

Author: mahirshah

css-property-parser.d.ts

@@ -1,6 +1,16 @@
 export = CssPropertyParser;
 
 declare namespace CssPropertyParser {
+  class ParseError extends Error {
+  }
+  class UnsupportedPropertyError extends Error {
+    readonly property: string;
+    constructor(property: string);
+  }
+  class UnknownPropertyError extends Error {
+    readonly property: string;
+    constructor(property: string);
+  }
   interface Declarations {
     [property: string]: string;
   }

src/errors/UnknownPropertyError.js

@@ -5,6 +5,10 @@
 module.exports = class UnknownPropertyError extends Error {
   constructor(property) {
     super(`Unknown property error: ${property} is not a known property`);
+    this._property = property;
     Error.captureStackTrace(this, UnknownPropertyError);
   }
+  get property() {
+    return this._property;
+  }
 };

src/errors/UnsupportedPropertyError.js

@@ -6,6 +6,10 @@
 module.exports = class UnsupportedPropertyError extends Error {
   constructor(property) {
     super(`Unsupported property error: ${property} is not a supported property`);
+    this._property = property;
     Error.captureStackTrace(this, UnsupportedPropertyError);
   }
+  get property() {
+    return this._property;
+  }
 };

src/index.js

@@ -3,11 +3,19 @@ const getShorthandComputedProperties = require('./getShorthandComputedProperties
 const isShorthandProperty = require('./isShorthandProperty');
 const getShorthandsForProperty = require('./getShorthandsForProperty');
 const isValidDeclaration = require('./isValidDeclaration');
+const {
+  ParseError,
+  UnsupportedPropertyError,
+  UnknownPropertyError,
+} = require('./errors');
 
 module.exports = {
   expandShorthandProperty,
   getShorthandComputedProperties,
   isShorthandProperty,
   isValidDeclaration,
   getShorthandsForProperty,
+  ParseError,
+  UnsupportedPropertyError,
+  UnknownPropertyError,
 };