JavaScript 返回具体类型方法

1/**
2 * 返回target类型
3 * @param {} target 
4 */
5function type(target) {
6    var ret = typeof (target);
7    var template = {
8        "[object Array]": "array",
9        "[object Object]": "object",
10        "[object Number]": "number-object",
11        "[object Boolean]": "boolean-object",
12        "[object string]": "string-object"
13    }
14    if (target === null) {
15        return null;
16    } else if (ret == "object") {
17        var str = Object.prototype.toString.call(target);
18        return template[str];
19    } else {
20        return ret;
21    }
22}