esprima - Javascript Object from External file, program -


i confused javascript's object system. know considered object in javascript in code of esprima, don't see statement declare project accessed esrpima following line: (https://github.com/ariya/esprima/blob/master/esprima.js)

var syntax = esprima.parse(text);

my question how , define esprima.parse(text) in javascript can exported external package , accessed object name. know how define object object = {a: "b"}; can't find way figure out. please me! 

(function (root, factory) {     'use strict';      // universal module definition (umd) support amd, commonjs/node.js,     // rhino, , plain browser loading.     if (typeof define === 'function' && define.amd) {         define(['exports'], factory);     } else if (typeof exports !== 'undefined') {         factory(exports);     } else {         factory((root.esprima = {}));     } }(this, function (exports) {     'use strict';      var token,         tokenname,  ...

that's because doesn't. variable name, esprima, comes code includes esprima. example:

var esprima = require('esprima'); esprima.parse(text);

you give variable other name:

var foo = require('esprima'); foo.parse(text);

all the esprima.js file define object exported. not dictate name of variable object assigned eventually.

if script loaded in browser, define esprima explicitly. can see in line 55:

 factory((root.esprima = {}));

this creates object , assigns root.esprima. it's function call, object passed factory, function defined in 57, accept parameter exports. code assigns properties to.


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