[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

docs/demos/views/field.vue

@@ -0,0 +1,105 @@
+<template>
+  <demo-section>
+    <demo-block :title="$t('basicUsage')">
+      <van-cell-group>
+        <van-field v-model="value" :placeholder="$t('usernamePlaceholder')"></van-field>
+      </van-cell-group>
+    </demo-block>
+
+    <demo-block :title="$t('title2')">
+      <van-cell-group>
+        <van-field
+          v-model="username"
+          :label="$t('username')"
+          icon="clear"
+          :placeholder="$t('usernamePlaceholder')"
+          required
+          @clickIcon="username = ''"
+        >
+        </van-field>
+
+        <van-field
+          v-model="password"
+          type="password"
+          :label="$t('password')"
+          :placeholder="$t('passwordPlaceholder')"
+          required>
+        </van-field>
+      </van-cell-group>
+    </demo-block>
+
+    <demo-block :title="$t('title3')">
+      <van-cell-group>
+        <van-field :value="$t('inputDisabled')" :label="$t('username')" disabled></van-field>
+      </van-cell-group>
+    </demo-block>
+
+    <demo-block :title="$t('title4')">
+      <van-cell-group>
+        <van-field :label="$t('username')" :placeholder="$t('usernamePlaceholder')" error></van-field>
+      </van-cell-group>
+    </demo-block>
+
+    <demo-block :title="$t('title5')">
+      <van-cell-group>
+        <van-field
+          v-model="message"
+          :label="$t('message')"
+          type="textarea"
+          :placeholder="$t('messagePlaceholder')"
+          rows="1"
+          autosize
+        >
+        </van-field>
+      </van-cell-group>
+    </demo-block>
+  </demo-section>
+</template>
+
+<script>
+export default {
+  i18n: {
+    'zh-CN': {
+      title2: '自定义类型',
+      title3: '禁用输入框',
+      title4: '错误提示',
+      title5: '高度自适应',
+      username: '用户名',
+      password: '密码',
+      message: '留言',
+      usernamePlaceholder: '请输入用户名',
+      passwordPlaceholder: '请输入密码',
+      messagePlaceholder: '请输入留言',
+      inputDisabled: '输入框已禁用'
+    },
+    'en-US': {
+      title2: 'Custom type',
+      title3: 'Disabled',
+      title4: 'Error info',
+      title5: 'Auto resize',
+      username: 'Username',
+      password: 'Password',
+      message: 'Message',
+      usernamePlaceholder: 'Username',
+      passwordPlaceholder: 'Password',
+      messagePlaceholder: 'Message',
+      inputDisabled: 'Disabled'
+    }
+  },
+
+  data() {
+    return {
+      value: '',
+      password: '',
+      username: '',
+      message: ''
+    };
+  }
+};
+</script>
+
+<style lang="postcss">
+.demo-field {
+  padding-bottom: 30px;
+}
+</style>