added expandable sidebar

src/container/Sidebar.jsx

 import React from 'react'
 import { connect } from 'react-redux'
 import { withRouter } from 'react-router'
+import classnames from 'classnames'
 import { translate } from 'react-i18next'
 import WorkspaceListItem from '../component/Sidebar/WorkspaceListItem.jsx'
 import { getWorkspaceList } from '../action-creator.async.js'
   constructor (props) {
     super(props)
     this.state = {
+      sidebarClose: false,
       workspaceIdInUrl: parseInt(props.match.params.idws)
     }
   }
     history.push(`${PAGE_NAME.WS_CONTENT}/${wsId}/${filterList.join(';')}`) // workspace.filter gets updated on react redraw from match.params
   }
 
+  handleClickToggleSidebar = () => this.setState(prev => ({sidebarClose: !prev.sidebarClose}))
+
   render () {
-    const { workspaceIdInUrl } = this.state
+    const { sidebarClose, workspaceIdInUrl } = this.state
     const { activeLang, workspace, workspaceList, app, t } = this.props
 
     return (
-      <div className='sidebar d-none d-lg-block'>
+      <div className={classnames('sidebar d-none d-lg-block', {'sidebarclose': sidebarClose})}>
+        <div className='sidebar__expand' onClick={this.handleClickToggleSidebar}>
+          <i className={classnames('fa fa-fw', {'fa-plus-square-o': sidebarClose, 'fa-minus-square-o': !sidebarClose})} />
+        </div>
+
         <nav className='sidebar__navigation'>
           <ul className='sidebar__navigation__workspace'>
             { workspaceList.map((ws, i) =>

src/css/Sidebar.styl

   background-color rgba(253, 253, 253, 0.3)
 
 .sidebar
+  position relative
+  transition all 0.5s
+  width 300px
+  &.sidebarclose
+    width 0
+    transform translateX(-300px)
+    .sidebar__expand
+      right -339px
+  &__expand
+    position absolute
+    top 0
+    right -39px
+    padding 5px 8px
+    border 1px solid white
+    border-bottom-right-radius 15px
+    cursor pointer
+    background-color blue
+    color white
+    transition all 0.5s
   &__btnnewworkspace
     margin-top 40px
     padding 10px