format output json object in node.js

node.js-format-output-json-object.md

node.js format output json object

https://stackoverflow.com/a/10729284/5934465

https://stackoverflow.com/questions/10729276/how-can-i-get-the-full-object-in-node-jss-console-log-rather-than-object

    
console.log(JSON.stringify(process.config, null, 4));

console.log(`\n!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!\n`);

---

---

    
#!/usr/bin/env node

const colors = require('colors');

/*

https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Object/toString


https://nodejs.org/api/buffer.html

https://stackoverflow.com/questions/16965281/node-js-tostring-encoding

https://stackoverflow.com/questions/34476754/what-encodings-does-buffer-tostring-support/34476785



https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify



JSON.stringify() 方法将一个JavaScript值转换为一个JSON字符串，如果指定了一个replacer函数，则可以替换值，或者如果指定了一个replacer数组，可选地仅包括指定的属性。

语法
JSON.stringify(value[, replacer [, space]])



# how to stringify object in node.js

https://www.npmjs.com/package/stringify-object

https://www.npmjs.com/package/node-stringify


http://timelessrepo.com/json-isnt-a-javascript-subset

https://stackoverflow.com/questions/16005091/node-js-javascript-stringify


https://stackoverflow.com/questions/5612787/converting-an-object-to-a-string


https://stackoverflow.com/questions/10729276/how-can-i-get-the-full-object-in-node-jss-console-log-rather-than-object








*/


console.log(`\n\n\n******************************\n\n\n`);

console.log(`\nprocess = \n`.red, typeof(process));
// object & JSON.stringify() 


// let xxx = JSON.stringify(process);


console.log(`\nprocess = \n`.rainbow, process);


console.log(`\n\n\n&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&\n\n\n`);



console.log(`\nprocess.argv = \n`.rainbow, typeof(process.argv));
// object & JSON.stringify() 


console.log(`\nprocess.argv = \n`, process.argv);


console.log(`\n\n\n++++++++++++++++++++++++++++++++++++++\n\n\n`);



console.log(`\nprocess.env = \n`.white, typeof(process.env));
// object & JSON.stringify() 


console.log(`\nprocess.env = \n`, process.env);

console.log(`\n\n\n@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\n\n\n`);



console.log(`\nprocess.config = \n`, process.config);


console.log(`\n!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!\n`);

console.log(JSON.stringify(process.config, null, 4));

// https://stackoverflow.com/a/10729284/5934465


console.log(`\n!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!\n`);

console.log(`\nprocess.argv = \n`.rainbow, typeof(process.argv));
// array object & JSON.stringify() 


console.log(`\nprocess.argv = \n`, process.argv);

console.log(JSON.stringify(process.argv, null, 4));

new

#!/usr/bin/env node

const colors = require('colors');

/*

https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Object/toString


https://nodejs.org/api/buffer.html

https://stackoverflow.com/questions/16965281/node-js-tostring-encoding

https://stackoverflow.com/questions/34476754/what-encodings-does-buffer-tostring-support/34476785



https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify



JSON.stringify() 方法将一个JavaScript值转换为一个JSON字符串，如果指定了一个replacer函数，则可以替换值，或者如果指定了一个replacer数组，可选地仅包括指定的属性。

语法
JSON.stringify(value[, replacer [, space]])



# how to stringify object in node.js

https://www.npmjs.com/package/stringify-object

https://www.npmjs.com/package/node-stringify


http://timelessrepo.com/json-isnt-a-javascript-subset

https://stackoverflow.com/questions/16005091/node-js-javascript-stringify


https://stackoverflow.com/questions/5612787/converting-an-object-to-a-string


https://stackoverflow.com/questions/10729276/how-can-i-get-the-full-object-in-node-jss-console-log-rather-than-object








*/


console.log(`\n\n\n******************************\n\n\n`);

console.log(`\nprocess = \n`.red, typeof(process));
// object & JSON.stringify() 


// let xxx = JSON.stringify(process);


console.log(`\nprocess = \n`.rainbow, process);


console.log(`\n\n\n&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&\n\n\n`);



console.log(`\nprocess.argv = \n`.rainbow, typeof(process.argv));
// object & JSON.stringify() 


console.log(`\nprocess.argv = \n`, process.argv);


console.log(`\n\n\n++++++++++++++++++++++++++++++++++++++\n\n\n`);



console.log(`\nprocess.env = \n`.white, typeof(process.env));
// object & JSON.stringify() 


console.log(`\nprocess.env = \n`, process.env);

console.log(`\n!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!\n`);

console.log(`\nprocess.env = \n`, JSON.stringify(process.env, null, 4));
// object object ???

console.log(`\n\n\n@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\n\n\n`);



console.log(`\nprocess.config = \n`, process.config);


console.log(`\n!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!\n`);

console.log(`\nprocess.config = \n`, JSON.stringify(process.config, null, 4));

// https://stackoverflow.com/a/10729284/5934465
// array object ???


console.log(`\n!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!\n`);

console.log(`\nprocess.argv = \n`.rainbow, typeof(process.argv));
// array object & JSON.stringify() 


console.log(`\nprocess.argv = \n`, process.argv);

console.log(JSON.stringify(process.argv, null, 4));

https://stackoverflow.com/a/10729391/5934465

error

TypeError: Converting circular structure to JSON

console.log(`\n\n\n******************************\n\n\n`);

console.log(`\nprocess = \n`.red, typeof(process));
// object & JSON.stringify() 


// let xxx = JSON.stringify(process);


console.log(`\nprocess = \n`.rainbow, process);

console.log(`\n!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!\n`);
console.log(`\n!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!\n`);


console.log(`\nprocess = \n`.rainbow, JSON.stringify(process, null, 4));


console.log(`\n!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!\n`);
console.log(`\n!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!\n`);



console.log(`\n\n\n&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&\n\n\n`);

TypeError: Converting circular structure to JSON

TypeError：将循环结构转换为JSON

https://stackoverflow.com/questions/4816099/chrome-sendrequest-error-typeerror-converting-circular-structure-to-json

这意味着你在请求中传递的对象有一个循环引用

     let a = {};
     a.b = a;
// JSON.stringify cannot convert structures like this.

https://stackoverflow.com/a/4816258/5934465

使用 JSON.stringify与自定义 replacer。

https://stackoverflow.com/questions/11616630/json-stringify-avoid-typeerror-converting-circular-structure-to-json

Use JSON.stringify with a custom replacer.

// Demo: Circular reference
var o = {};
o.o = o;

// Note: cache should not be re-used by repeated calls to JSON.stringify.
var cache = [];
JSON.stringify(o, function(key, value) {
    if (typeof value === 'object' && value !== null) {
        if (cache.indexOf(value) !== -1) {
            // Circular reference found, discard key
            return;
        }
        // Store value in our collection
        cache.push(value);
    }
    return value;
});
cache = null; // Enable garbage collection

https://stackoverflow.com/a/11616993/5934465