improve(frontend): only trigger onblur when needed

Author: wang0618

.gitignore

@@ -11,4 +11,5 @@ pywebio/html/js/pywebio.min.*
 /build
 /dist
 /*.egg-info
-/docs/_build
+/docs/_build
+/archive

docs/spec.rst

@@ -80,6 +80,7 @@ The ``inputs`` field is a list of input items, each input item is a ``dict``, th
 * type: Input type, required.
 * name: Identifier of the input field, required.
 * onchange: bool, whether to push input value when input change
+* onbulr: bool, whether to push input value when input field `onblur`
 * auto_focus: Set focus automatically. At most one item of ``auto_focus`` can be true in the input item list
 * help_text: Help text for the input
 * Additional HTML attribute of the input element

pywebio/input.py

@@ -97,14 +97,20 @@ def _parse_args(kwargs, excludes=()):
     """
     kwargs = {k: v for k, v in kwargs.items() if v is not None and k not in excludes}
     assert is_html_safe_value(kwargs.get('name', '')), '`name` can only contains a-z、A-Z、0-9、_、-'
+
     kwargs.update(kwargs.get('other_html_attrs', {}))
     kwargs.pop('other_html_attrs', None)
+
+    if kwargs.get('validate'):
+        kwargs['onblur'] = True
     valid_func = kwargs.pop('validate', lambda _: None)
+
     if kwargs.get('onchange'):
         onchange_func = kwargs['onchange']
         kwargs['onchange'] = True
     else:
         onchange_func = lambda _: None
+
     return kwargs, valid_func, onchange_func