feat: validate options

Author: alexander-akait

lib/loader.js

@@ -3,6 +3,8 @@
   Author Tobias Koppers @sokra
 */
 
+const schema = require("./options.json");
+const validate = require("@webpack-contrib/schema-utils");
 const loaderUtils = require("loader-utils");
 const postcss = require("postcss");
 const plugin = require("./plugin");
@@ -11,13 +13,14 @@ const SyntaxError = require("./SyntaxError");
 module.exports = function(content, map, meta) {
   const options = loaderUtils.getOptions(this) || {};
 
-  // Todo validate options
+  validate({ name: "CSS Loader", schema, target: options });
 
   const cb = this.async();
-  const sourceMap = options.sourceMap || false;
-  const url = typeof options.url === "undefined" ? true : options.url;
-  const importOpt = typeof options.import === "undefined" ? true : options.import;
-  const importLoaders = options.importLoaders || 0;
+  const { url, import: importOpt, sourceMap, importLoaders } = Object.assign(
+    {},
+    { url: true, import: true, sourceMap: false, importLoaders: 0 },
+    loaderUtils.getOptions(this) || {}
+  );
 
   if (sourceMap && map) {
     if (typeof map === "string") {
@@ -115,11 +118,8 @@ module.exports = function(content, map, meta) {
 
       if (result.messages && result.messages.length > 0) {
         result.messages
-          .filter(
-            message =>
-              message.type === "modify-code" ? message : false
-          )
-          .forEach((message) => {
+          .filter(message => (message.type === "modify-code" ? message : false))
+          .forEach(message => {
             try {
               newContentObj = message.modifyCode(this, newContentObj);
             } catch (err) {

lib/options.json

@@ -0,0 +1,18 @@
+{
+  "type": "object",
+  "properties": {
+    "url": {
+      "type": "boolean"
+    },
+    "import": {
+      "type": "boolean"
+    },
+    "sourceMap": {
+      "type": "boolean"
+    },
+    "importLoaders": {
+      "type": "number"
+    }
+  },
+  "additionalProperties": false
+}