fix[Waves-Directive]: fixed v-waves does not support update (#1705)

src/directive/waves/waves.js

@@ -1,14 +1,18 @@
 import './waves.css'
 
-export default{
-  bind(el, binding) {
-    el.addEventListener('click', e => {
+const context = '@@wavesContext'
+
+function handleClick(el, binding) {
+  function handle(e) {
     const customOpts = Object.assign({}, binding.value)
-      const opts = Object.assign({
+    const opts = Object.assign(
+      {
         ele: el, // 波纹作用元素
         type: 'hit', // hit 点击位置扩散 center中心点扩展
         color: 'rgba(0, 0, 0, 0.15)' // 波纹颜色
-      }, customOpts)
+      },
+      customOpts
+    )
     const target = opts.ele
     if (target) {
       target.style.position = 'relative'
@@ -25,18 +29,45 @@ export default{
       }
       switch (opts.type) {
         case 'center':
-            ripple.style.top = (rect.height / 2 - ripple.offsetHeight / 2) + 'px'
-            ripple.style.left = (rect.width / 2 - ripple.offsetWidth / 2) + 'px'
+          ripple.style.top = rect.height / 2 - ripple.offsetHeight / 2 + 'px'
+          ripple.style.left = rect.width / 2 - ripple.offsetWidth / 2 + 'px'
           break
         default:
-            ripple.style.top = (e.pageY - rect.top - ripple.offsetHeight / 2 - document.documentElement.scrollTop || document.body.scrollTop) + 'px'
-            ripple.style.left = (e.pageX - rect.left - ripple.offsetWidth / 2 - document.documentElement.scrollLeft || document.body.scrollLeft) + 'px'
+          ripple.style.top =
+            (e.pageY - rect.top - ripple.offsetHeight / 2 - document.documentElement.scrollTop ||
+              document.body.scrollTop) + 'px'
+          ripple.style.left =
+            (e.pageX - rect.left - ripple.offsetWidth / 2 - document.documentElement.scrollLeft ||
+              document.body.scrollLeft) + 'px'
       }
       ripple.style.backgroundColor = opts.color
       ripple.className = 'waves-ripple z-active'
       return false
     }
-    }, false)
-  }
   }
 
+  if (!el[context]) {
+    el[context] = {
+      removeHandle: handle
+    }
+  } else {
+    el[context].removeHandle = handle
+  }
+
+  return handle
+}
+
+export default {
+  bind(el, binding) {
+    el.addEventListener('click', handleClick(el, binding), false)
+  },
+  update(el, binding) {
+    el.removeEventListener('click', el[context].removeHandle, false)
+    el.addEventListener('click', handleClick(el, binding), false)
+  },
+  unbind(el) {
+    el.removeEventListener('click', el[context].removeHandle, false)
+    el[context] = null
+    delete el[context]
+  }
+}