fix(FieldApi): prevent onChange validation on handleBlur for untouched fields (#1578)

fix(form-core): avoid triggering onChange when untouched field is blurred

Author: LeCarbonator

packages/form-core/src/FieldApi.ts

@@ -1671,7 +1671,6 @@ export class FieldApi<
     const prevTouched = this.state.meta.isTouched
     if (!prevTouched) {
       this.setMeta((prev) => ({ ...prev, isTouched: true }))
-      this.validate('change')
     }
     if (!this.state.meta.isBlurred) {
       this.setMeta((prev) => ({ ...prev, isBlurred: true }))

packages/form-core/tests/FieldApi.spec.ts

@@ -2479,4 +2479,25 @@ describe('field api', () => {
 
     expect(field.getMeta().errorSourceMap.onChange).toEqual('field')
   })
+
+  it('should not run onChange validation when onBlur is triggered', () => {
+    const form = new FormApi({
+      defaultValues: { a: '' },
+    })
+    form.mount()
+
+    const field = new FieldApi({
+      form,
+      name: 'a',
+      validators: {
+        onChange: () => 'Change error',
+        onBlur: () => 'Blur error',
+      },
+    })
+    field.mount()
+
+    field.handleBlur()
+
+    expect(field.state.meta.errors).toStrictEqual(['Blur error'])
+  })
 })