*

static/element-ui/lib/transitions/collapse-transition.js

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+'use strict';
+
+exports.__esModule = true;
+
+var _dom = require('element-ui/lib/utils/dom');
+
+function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
+
+var Transition = function () {
+  function Transition() {
+    _classCallCheck(this, Transition);
+  }
+
+  Transition.prototype.beforeEnter = function beforeEnter(el) {
+    (0, _dom.addClass)(el, 'collapse-transition');
+    if (!el.dataset) el.dataset = {};
+
+    el.dataset.oldPaddingTop = el.style.paddingTop;
+    el.dataset.oldPaddingBottom = el.style.paddingBottom;
+
+    el.style.height = '0';
+    el.style.paddingTop = 0;
+    el.style.paddingBottom = 0;
+  };
+
+  Transition.prototype.enter = function enter(el) {
+    el.dataset.oldOverflow = el.style.overflow;
+    if (el.scrollHeight !== 0) {
+      el.style.height = el.scrollHeight + 'px';
+      el.style.paddingTop = el.dataset.oldPaddingTop;
+      el.style.paddingBottom = el.dataset.oldPaddingBottom;
+    } else {
+      el.style.height = '';
+      el.style.paddingTop = el.dataset.oldPaddingTop;
+      el.style.paddingBottom = el.dataset.oldPaddingBottom;
+    }
+
+    el.style.overflow = 'hidden';
+  };
+
+  Transition.prototype.afterEnter = function afterEnter(el) {
+    // for safari: remove class then reset height is necessary
+    (0, _dom.removeClass)(el, 'collapse-transition');
+    el.style.height = '';
+    el.style.overflow = el.dataset.oldOverflow;
+  };
+
+  Transition.prototype.beforeLeave = function beforeLeave(el) {
+    if (!el.dataset) el.dataset = {};
+    el.dataset.oldPaddingTop = el.style.paddingTop;
+    el.dataset.oldPaddingBottom = el.style.paddingBottom;
+    el.dataset.oldOverflow = el.style.overflow;
+
+    el.style.height = el.scrollHeight + 'px';
+    el.style.overflow = 'hidden';
+  };
+
+  Transition.prototype.leave = function leave(el) {
+    if (el.scrollHeight !== 0) {
+      // for safari: add class after set height, or it will jump to zero height suddenly, weired
+      (0, _dom.addClass)(el, 'collapse-transition');
+      el.style.height = 0;
+      el.style.paddingTop = 0;
+      el.style.paddingBottom = 0;
+    }
+  };
+
+  Transition.prototype.afterLeave = function afterLeave(el) {
+    (0, _dom.removeClass)(el, 'collapse-transition');
+    el.style.height = '';
+    el.style.overflow = el.dataset.oldOverflow;
+    el.style.paddingTop = el.dataset.oldPaddingTop;
+    el.style.paddingBottom = el.dataset.oldPaddingBottom;
+  };
+
+  return Transition;
+}();
+
+exports.default = {
+  functional: true,
+  render: function render(h, _ref) {
+    var children = _ref.children;
+
+    var data = {
+      on: new Transition()
+    };
+
+    return h('transition', data, children);
+  }
+};