chushihua

node_modules/element-ui/src/utils/clickoutside.js

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+import Vue from 'vue';
+import { on } from 'element-ui/src/utils/dom';
+
+const nodeList = [];
+const ctx = '@@clickoutsideContext';
+
+let startClick;
+let seed = 0;
+
+!Vue.prototype.$isServer && on(document, 'mousedown', e => (startClick = e));
+
+!Vue.prototype.$isServer && on(document, 'mouseup', e => {
+  nodeList.forEach(node => node[ctx].documentHandler(e, startClick));
+});
+
+function createDocumentHandler(el, binding, vnode) {
+  return function(mouseup = {}, mousedown = {}) {
+    if (!vnode ||
+      !vnode.context ||
+      !mouseup.target ||
+      !mousedown.target ||
+      el.contains(mouseup.target) ||
+      el.contains(mousedown.target) ||
+      el === mouseup.target ||
+      (vnode.context.popperElm &&
+      (vnode.context.popperElm.contains(mouseup.target) ||
+      vnode.context.popperElm.contains(mousedown.target)))) return;
+
+    if (binding.expression &&
+      el[ctx].methodName &&
+      vnode.context[el[ctx].methodName]) {
+      vnode.context[el[ctx].methodName]();
+    } else {
+      el[ctx].bindingFn && el[ctx].bindingFn();
+    }
+  };
+}
+
+/**
+ * v-clickoutside
+ * @desc 点击元素外面才会触发的事件
+ * @example
+ * ```vue
+ * <div v-element-clickoutside="handleClose">
+ * ```
+ */
+export default {
+  bind(el, binding, vnode) {
+    nodeList.push(el);
+    const id = seed++;
+    el[ctx] = {
+      id,
+      documentHandler: createDocumentHandler(el, binding, vnode),
+      methodName: binding.expression,
+      bindingFn: binding.value
+    };
+  },
+
+  update(el, binding, vnode) {
+    el[ctx].documentHandler = createDocumentHandler(el, binding, vnode);
+    el[ctx].methodName = binding.expression;
+    el[ctx].bindingFn = binding.value;
+  },
+
+  unbind(el) {
+    let len = nodeList.length;
+
+    for (let i = 0; i < len; i++) {
+      if (nodeList[i][ctx].id === el[ctx].id) {
+        nodeList.splice(i, 1);
+        break;
+      }
+    }
+    delete el[ctx];
+  }
+};