把json字符串转换为json对象,json字符串中包含js函数该如何处理？

Bertha 。 2022-11-14 00:58 213阅读 0赞

**先搞清楚如下几个案例**

**案例1**

![2021032808160423.png][]

//
    function myFun(){
    	return Function('return ' + 8899)();
    }
    
    console.log(myFun()); //8899

**运行结果如下：**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2N6aDUwMA_size_16_color_FFFFFF_t_70][]

**案例2**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2N6aDUwMA_size_16_color_FFFFFF_t_70 1][]

//在js中，void是一个操作符
    console.log(void (6), void (0), void (1), void ("hello"), void (true), void (57.68));
    console.log(void 6, void 0, void 1, void "hello", void true, void 57.68);
    
    //eval()函数
    //js中eval()函数参考网页https://www.w3school.com.cn/js/jsref_eval.asp
    console.log("*1*", eval(666)); //666
    console.log("*2*", eval("8888")); //8888
    console.log("*3*", eval("2 + 3")); //5
    console.log("*4*", eval(5 * 10)); //50
    var x = 6;
    console.log("*5*", eval(x * 10)); //60
    console.log("*6*", eval("x" * 7)); //NaN
    // console.log(eval("tom")); //报错，tom is not defined
    console.log("*7*", eval("function yes(){return 321;}")); //undefined
    console.log("*7B*", eval("function yes(){}")); //undefined
    console.log("*7C*", eval("(function yes(){})")); //ƒ yes(){}
    console.log("*8*", eval("(function yes(){return 321;})")); //ƒ yes(){return 321;}
    console.log("*9*", eval("(" + "function yes(){return 321;}" + "()" + ")")); //321
    
    function ok(){return 321;}
    console.log("*10*", eval("ok")); //ƒ ok(){return 321;}
    console.log("*11*", eval(ok)); //ƒ ok(){return 321;}

**运行结果如下：**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2N6aDUwMA_size_16_color_FFFFFF_t_70 2][]

**案例3**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2N6aDUwMA_size_16_color_FFFFFF_t_70 3][]

![20210401030822566.png][]

**运行结果如下：**

![20210401031029894.png][]

**案例4(把json字符串转换为json对象,json字符串中包含js函数)**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2N6aDUwMA_size_16_color_FFFFFF_t_70 4][]

**运行结果如下：**

![20210401031439365.png][]

[2021032808160423.png]: /images/20221022/5399037a1b494160963aed8b7edeced7.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2N6aDUwMA_size_16_color_FFFFFF_t_70]: /images/20221022/4ec191fb7618404db31dc0c6baabba51.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2N6aDUwMA_size_16_color_FFFFFF_t_70 1]: /images/20221022/621fcc706e16449289b390a09ac3e214.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2N6aDUwMA_size_16_color_FFFFFF_t_70 2]: /images/20221022/83319dfd1290407790483d3e1feb886d.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2N6aDUwMA_size_16_color_FFFFFF_t_70 3]: /images/20221022/62ccbff1614942af895f3fc0fe4396c9.png
[20210401030822566.png]: /images/20221022/d3abcb29e39e499db44f94169409955b.png
[20210401031029894.png]: /images/20221022/6d70f379f8964abda527332be5db99f1.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2N6aDUwMA_size_16_color_FFFFFF_t_70 4]: /images/20221022/505f50ddb4b74d7fa37a31937206badb.png
[20210401031439365.png]: /images/20221022/0bb08e6ce9e04e9fafdf055d72fa5d2c.png