[new feature] add i18n support (#310)

* fix: Tabbar icon line-height

* [new feature] progress add showPivot prop

* [new feature] TabItem support vue-router

* [new feature] update document header style

* [Doc] add toast english ducoment

* [new feature] add i18n support

* feat: Extract demos from markdown

* feat: Base components demos

* [new feature] complete demo extract & translate

* [fix] text cases

* fix: add deepAssign test cases

* fix: changelog detail

* [new feature] AddressEdit support i18n

packages/utils/camelize.js

@@ -0,0 +1,4 @@
+const camelizeRE = /-(\w)/g;
+export default function(str) {
+  return str.replace(camelizeRE, (_, c) => c ? c.toUpperCase() : '');
+}

packages/utils/deep-assign.js

@@ -0,0 +1,34 @@
+const hasOwnProperty = Object.prototype.hasOwnProperty;
+
+function isObj(x) {
+  const type = typeof x;
+  return x !== null && (type === 'object' || type === 'function');
+}
+
+function assignKey(to, from, key) {
+  const val = from[key];
+
+  if (
+    val === undefined ||
+    val === null ||
+    (hasOwnProperty.call(to, key) &&
+      (to[key] === undefined || to[key] === null))
+  ) {
+    return;
+  }
+
+  if (!hasOwnProperty.call(to, key) || !isObj(val)) {
+    to[key] = val;
+  } else {
+    to[key] = assign(Object(to[key]), from[key]);
+  }
+}
+
+export default function assign(to, from) {
+  for (const key in from) {
+    if (hasOwnProperty.call(from, key)) {
+      assignKey(to, from, key);
+    }
+  }
+  return to;
+}

packages/utils/get.js

@@ -0,0 +1,9 @@
+export default function(object, path) {
+  const keys = path.split('.');
+  let result = object;
+
+  keys.forEach(key => {
+    result = result[key] || '';
+  });
+  return result;
+}