underscore.string下载正确引用后为什么会报错，非node方式

Question

<meta charset="utf-8"/>

<script src="../underscore.js"></script>

<script src="../underscore.string.js"></script>

<script src="../jquery.js"></script>

<script src="../backbone.js"></script>

<script>

//TypeError: _(...).chain(...).trim is not a function

    console.log(_("   epeli  ").chain().trim().capitalize().value());

</script>

Answer 1

var test = "&nbsp; &nbsp;this is a test&nbsp; &nbsp; ";console.log(test);&nbsp; &nbsp; // "&nbsp; &nbsp;this is a test&nbsp; &nbsp; "test = _.str.trim(test);console.log(test);&nbsp; &nbsp; // "this is a test"test = _.str.capitalize(test);console.log(test);&nbsp; &nbsp; // "This is a test"