图像模型

src/directive/waves/index.js

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+import './waves.css'
+
+const context = '@@wavesContext'
+
+function handleClick(el, binding) {
+  function handle(e) {
+    const customOpts = Object.assign({}, binding.value)
+    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
+    )
+    const target = opts.ele
+    if (target) {
+      target.style.position = 'relative'
+      target.style.overflow = 'hidden'
+      const rect = target.getBoundingClientRect()
+      let ripple = target.querySelector('.waves-ripple')
+      if (!ripple) {
+        ripple = document.createElement('span')
+        ripple.className = 'waves-ripple'
+        ripple.style.height = ripple.style.width = Math.max(rect.width, rect.height) + 'px'
+        target.appendChild(ripple)
+      } else {
+        ripple.className = 'waves-ripple'
+      }
+      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'
+          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.backgroundColor = opts.color
+      ripple.className = 'waves-ripple z-active'
+      return 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]
+  }
+}

src/directive/waves/waves.css

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+.waves-ripple {
+  position: absolute;
+  border-radius: 100%;
+  background-color: rgba(0, 0, 0, 0.15);
+  background-clip: padding-box;
+  pointer-events: none;
+  -webkit-user-select: none;
+  -moz-user-select: none;
+  -ms-user-select: none;
+  user-select: none;
+  -webkit-transform: scale(0);
+  -ms-transform: scale(0);
+  transform: scale(0);
+  opacity: 1;
+}
+
+.waves-ripple.z-active {
+  opacity: 0;
+  -webkit-transform: scale(2);
+  -ms-transform: scale(2);
+  transform: scale(2);
+  -webkit-transition: opacity 0.8s ease-out, -webkit-transform 0.8s ease-out;
+  transition: opacity 0.8s ease-out, -webkit-transform 0.8s ease-out;
+  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
+  transition: opacity 0.8s ease-out, transform 0.8s ease-out, -webkit-transform 0.8s ease-out;
+}