popup component

src/utils/dom.js

@@ -0,0 +1,45 @@
+/* istanbul ignore next */
+export function addClass(el, cls) {
+  if (!el) return;
+  var curClass = el.className;
+  var classes = (cls || '').split(' ');
+
+  for (var i = 0, j = classes.length; i < j; i++) {
+    var clsName = classes[i];
+    if (!clsName) continue;
+
+    if (el.classList) {
+      el.classList.add(clsName);
+    } else {
+      if (!hasClass(el, clsName)) {
+        curClass += ' ' + clsName;
+      }
+    }
+  }
+  if (!el.classList) {
+    el.className = curClass;
+  }
+};
+
+/* istanbul ignore next */
+export function removeClass(el, cls) {
+  if (!el || !cls) return;
+  var classes = cls.split(' ');
+  var curClass = ' ' + el.className + ' ';
+
+  for (var i = 0, j = classes.length; i < j; i++) {
+    var clsName = classes[i];
+    if (!clsName) continue;
+
+    if (el.classList) {
+      el.classList.remove(clsName);
+    } else {
+      if (hasClass(el, clsName)) {
+        curClass = curClass.replace(' ' + clsName + ' ', ' ');
+      }
+    }
+  }
+  if (!el.classList) {
+    el.className = trim(curClass);
+  }
+};

src/utils/merge.js

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+export default function(target, ...sources) {
+  for (let i = 1, j = sources.length; i < j; i++) {
+    let source = arguments[i] || {};
+    for (let prop in source) {
+      if (source.hasOwnProperty(prop)) {
+        let value = source[prop];
+        if (value !== undefined) {
+          target[prop] = value;
+        }
+      }
+    }
+  }
+
+  return target;
+};