#51 Added test,

switched jest env to jsdom,
lint fixed

jest.config.js

@@ -0,0 +1,5 @@
+const config = {
+    testEnvironment: "jsdom",
+  };
+  
+module.exports = config;

src/directive.js

@@ -7,7 +7,7 @@ function getOpts (mask) {
   if (mask.mask) {
     opts.mask = Array.isArray(mask.mask) ? JSON.stringify(mask.mask) : mask.mask
     opts.tokens = mask.tokens ? { ...mask.tokens } : {}
-    opts.preprocessor = mask.preprocessor;
+    opts.preprocessor = mask.preprocessor
   } else {
     opts.mask = Array.isArray(mask) ? JSON.stringify(mask) : mask
   }
@@ -32,7 +32,7 @@ const directive = () => {
     if (state.has(el) && !needUpdate(mask)) {
       return
     }
-    
+
     state.set(el, new Maska(el, getOpts(mask.value)))
   }
 }

src/mask.js

@@ -21,7 +21,7 @@ function dynamic (mask) {
     const processed = masks.map(m => process(value, m, tokens, false))
     const last = processed.pop()
 
-    for (let i in masks) {
+    for (const i in masks) {
       if (checkMask(last, masks[i], tokens)) {
         return process(value, masks[i], tokens, masked)
       }
@@ -31,7 +31,7 @@ function dynamic (mask) {
   }
 
   function checkMask (variant, mask, tokens) {
-    for (let tok in tokens) {
+    for (const tok in tokens) {
       if (tokens[tok].escape) {
         mask = mask.replace(new RegExp(tok + '.{1}', 'g'), '')
       }
@@ -62,8 +62,8 @@ function process (value, mask, tokens, masked = true) {
             ret += mask[im]
             im++
           } else if (tokens[mask[im]] && tokens[mask[im]].escape) {
-            ret += mask[im+1]
+            ret += mask[im + 1]
-            im = im+2
+            im = im + 2
           }
         }
       }

src/maska.js

@@ -6,7 +6,7 @@ export default class Maska {
   constructor (el, opts = {}) {
     if (!el) throw new Error('Maska: no element for mask')
 
-    if (opts.preprocessor != null && typeof opts.preprocessor != 'function') {
+    if (opts.preprocessor != null && typeof opts.preprocessor !== 'function') {
       throw new Error('Maska: preprocessor must be a function')
     }
 
@@ -19,7 +19,6 @@ export default class Maska {
       }
     }
 
-
     this._opts = {
       mask: opts.mask,
       tokens: { ...tokens, ...opts.tokens },
@@ -71,10 +70,10 @@ export default class Maska {
     const digit = oldValue[position - 1]
 
     el.dataset.maskRawValue = mask(el.value, el.dataset.mask, this._opts.tokens, false)
-    let elValue = el.value;
+    let elValue = el.value
-    
+
     if (this._opts.preprocessor) {
-      elValue = this._opts.preprocessor(elValue);
+      elValue = this._opts.preprocessor(elValue)
     }
 
     el.value = mask(elValue, el.dataset.mask, this._opts.tokens)

test/mask.test.js

@@ -1,5 +1,6 @@
 import mask from './../src/mask'
 import tokens from './../src/tokens'
+import Maska from './../src/maska'
 
 test('12 #.#', () => {
     expect(mask('12', '#.#', tokens)).toBe('1.2')
@@ -205,3 +206,19 @@ test('Custom transform with `uppercase` and `lowercase` enabled: abkTYX -> АВ
         }
     })).toBe('авктух')
 })
+
+test('Custom value preprocessing', () => {
+    const elem = document.createElement('input')
+    document.body.appendChild(elem)
+
+    const mask = new Maska(elem, {
+        mask: 'S*',
+        preprocessor: function(val) {
+            return val.toLocaleUpperCase()
+        }
+    })
+    elem.value = "abkTYX"
+    elem.dispatchEvent(new Event('input', {bubbles: true}))
+
+    expect(elem.value).toBe("ABKTYX")   
+})