如何在我的项目中设置tern-vim？

Question

我想在我的项目中设置tern-vim并点击此链接https://github.com/ternjs/tern_for_vim/blob/master/doc/tern.txt.安装完成后,我在项目的根目录下创建了一个.tern-project文件,如下所示.

{
      "libs": [
        "browser",
        "jquery"
      ],
      "loadEagerly": [
        "importantfile.js"
      ],
      "plugins": {
        "requirejs": {
          "baseURL": "./",
          "paths": {}
        }
      }
    }

当我用vim命令打开一个js文件时,我不能使用如下的任何tern命令:

|:TernDoc|...................... Look up Documentation
    |:TernDocBrowse|................ Browse the Documentation
    |:TernType|..................... Perform a type look up
    |:TernDef|...................... Look up definition
    |:TernDefPreview|............... Look up definition in preview
    |:TernDefSplit|................. Look up definition in new split
    |:TernDefTab|................... Look up definition in new tab
    |:TernRefs|..................... Look up references
    |:TernRename|................... Rename identifier

我会得到Not an editor command错误.我是否需要进行任何其他配置？