prevent dispatch form event

when component import an Input, prevent dispatch event from Input to
Form

src/utils/assist.js

@@ -165,4 +165,22 @@ export function scrollTop(el, from = 0, to, duration = 500) {
         window.requestAnimationFrame(() => scroll(d, end, step));
     }
     scroll(from, to, step);
-}
+}
+
+// Find components upward
+function findComponentUpward (content, componentName, componentNames) {
+    if (typeof componentName === 'string') {
+        componentNames = [componentName];
+    } else {
+        componentNames = componentName;
+    }
+
+    let parent = content.$parent;
+    let name = parent.$options.name;
+    while (parent && (!name || componentNames.indexOf(name) < 0)) {
+        parent = parent.$parent;
+        if (parent) name = parent.$options.name;
+    }
+    return parent;
+}
+export {findComponentUpward};