[fix] TextInput keyboardType for 'numeric' and 'decimal'

Don't rely on native restrictions and validations for these keyboardType
values, as developers often want custom presentation (e.g., comma separators)
and custom validation.

Fix necolas#1705
Fix necolas#1438
Fix necolas#1280
Close necolas#1709

Author: RichardLindhout

src/exports/TextInput/__tests__/index-test.js

@@ -165,10 +165,22 @@ describe('components/TextInput', () => {
       expect(input.type).toEqual('email');
     });
 
+    test('value "decimal-pad"', () => {
+      const { container } = render(<TextInput keyboardType="decimal-pad" />);
+      const input = findInput(container);
+      expect(input.inputMode).toEqual('decimal');
+    });
+
+    test('value "number-pad"', () => {
+      const { container } = render(<TextInput keyboardType="number-pad" />);
+      const input = findInput(container);
+      expect(input.inputMode).toEqual('numeric');
+    });
+
     test('value "numeric"', () => {
       const { container } = render(<TextInput keyboardType="numeric" />);
       const input = findInput(container);
-      expect(input.type).toEqual('number');
+      expect(input.inputMode).toEqual('numeric');
     });
 
     test('value "phone-pad"', () => {

src/exports/TextInput/index.js

@@ -155,14 +155,18 @@ const TextInput = forwardRef<TextInputProps, *>((props, forwardedRef) => {
   } = props;
 
   let type;
+  let inputMode;
 
   switch (keyboardType) {
     case 'email-address':
       type = 'email';
       break;
     case 'number-pad':
     case 'numeric':
-      type = 'number';
+      inputMode = 'numeric';
+      break;
+    case 'decimal-pad':
+      inputMode = 'decimal';
       break;
     case 'phone-pad':
       type = 'tel';
@@ -368,6 +372,7 @@ const TextInput = forwardRef<TextInputProps, *>((props, forwardedRef) => {
   supportedProps.spellCheck = spellCheck != null ? spellCheck : autoCorrect;
   supportedProps.style = style;
   supportedProps.type = multiline ? undefined : type;
+  supportedProps.inputMode = inputMode;
 
   usePlatformMethods(hostRef, supportedProps);