javascript - 如何在 Node.JS 中使用这个函数？

Question

//tools.js
function randomString() {
    var chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz";
    var string_length = 8;
    var randomstring = '';
    for (var i=0; i<string_length; i++) {
        var rnum = Math.floor(Math.random() * chars.length);
        randomstring += chars.substring(rnum,rnum+1);
    }
    return randomString;
}
exports.randomString = randomString();


//test.js
var tools = require('./tools');
console.log(tools.randomString());

但是当我运行它时，我得到了这个:

[Function: randomString]

我如何真正让它吐出一个随机字符串？

Answer 1

exports.randomString = randomString;

或

exports.randomString = function() {....}