Merge pull request #313 from Kongfujonstew/fix-delete-err

Bug fix: Bypass formatNumber if user is deleting

src/components/IntlTelInput.js

@@ -1205,13 +1205,21 @@ class IntlTelInput extends Component {
   // or udpate the state and notify change if component is uncontrolled
   handleInputChange = e => {
     let cursorPosition = e.target.selectionStart;
+    // previous value is pre formatted value
     const previousValue = e.target.value;
+    // prior value is existing state value/ before update
+    const priorValue = this.state.value;
     const previousStringBeforeCursor =
       previousValue === ''
         ? previousValue
         : previousValue.substring(0, cursorPosition);
+
+    // Don't format if user is deleting chars
+    const formattedValue = previousValue.length < priorValue.length
+      ? previousValue
+      : this.formatNumber(e.target.value);
     const value = this.props.format
-      ? this.formatNumber(e.target.value)
+      ? formattedValue
       : e.target.value;
 
     cursorPosition = utils.getCursorPositionAfterFormating(