toSrc

toSrc

Turns every JavaScript object or primitive into valid source code that can be evaled again.

You can use it to serialize classes, modules or other programming objects and reuse them in an other environment such as a browser. JSON.stringify doesnt work with programming objects (that contain functions, dates, etc.) because they're no legal JSONs.

Works with node.js (tested) or in the browser (not tested)

Installation

npm install toSrc

Usage

• Params

  1. obj: The object to stringify. Can also be a primitive like 1 or true.
  2. depth (optional): The depth to go. All nested structures like objects or arrays deeper than this will be undefined. Defaults to 1, meaning that every object or array will be undefined by default.

• In node.js

  require("toSrc")(obj, depth);

• In the browser

  Just call toSrc(obj, depth);

Examples

    var toSrc = require("toSrc");
    
    // Primitives
    ///////////////////////////////////////
    toSrc(1); // = '1'
    toSrc(true); // = 'true'
    toSrc("1"); // = '"1"'

    // Constants
    ///////////////////////////////////////
    toSrc(Math.PI); // = 'Math.PI'
    toSrc(NaN); // = 'NaN'

    // RegExp
    ///////////////////////////////////////
    toSrc(/myRegEx/gi); // = '/myRegEx/gi'
    toSrc(new RegExp("myRegEx"); // = '/myRegEx/'

    // Date
    ///////////////////////////////////////
    toSrc(new Date()); // = 'new Date(<the time of creation in ms>)'

    // Functions
    ///////////////////////////////////////
    toSrc(function() {
        var test = "hello";
    }); /* = 'function () {
                 var test = "hello";
             }' */

    // Arrays
    ///////////////////////////////////////
    toSrc([1, 2, "3"]); // = '[1, 2, "3"]'
    toSrc([1, 2, ["a", "b", "c"]]); // = '[1, 2, undefined]' because the depth is 1 by default
    toSrc([1, 2, ["a", "b", "c"]], 2); // = '[1, 2, ["a", "b", "c"]]'

    // Objects
    ///////////////////////////////////////
    toSrc({
        "regEx": /regex/gi,
        "anotherObj": {
            "test": "test"
        }
    });
    // = '{"regEx": /regex/gi, "anotherObj": undefined}'
    // anotherObj is undefined because the depth is 1 by default.
    toSrc({
        "regEx": /regex/gi,
        "anotherObj": {
            "test": "test"
        }
    }, 2);
    // = '{"regEx": /regex/gi, "anotherObj": {"test": "test"}}'

For more examples, check out the test/test.js

Notes

• Circular references will be undefined. No error is thrown, but a warning is logged.
• All math constants are restored to their source representation, e.g.: toSrc(Math.PI); // = 'Math.PI' instead of 3.14...
• All dates are restored to their original time of creation, e.g.: toSrc(new Date()) // = 'new Date(<time of creation in ms>)'
• Dynamic regular expressions created via new RegExp() will NOT be dynamic anymore. toSrc(new RegExp(someString)) will return '/<value of someString>/' instead of `'new RegExp(someString)'

Feel free to modify the code to meet your needs.