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43 lines
1.6 KiB
43 lines
1.6 KiB
var global = require('./_global'); |
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var core = require('./_core'); |
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var hide = require('./_hide'); |
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var redefine = require('./_redefine'); |
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var ctx = require('./_ctx'); |
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var PROTOTYPE = 'prototype'; |
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var $export = function (type, name, source) { |
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var IS_FORCED = type & $export.F; |
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var IS_GLOBAL = type & $export.G; |
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var IS_STATIC = type & $export.S; |
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var IS_PROTO = type & $export.P; |
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var IS_BIND = type & $export.B; |
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var target = IS_GLOBAL ? global : IS_STATIC ? global[name] || (global[name] = {}) : (global[name] || {})[PROTOTYPE]; |
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var exports = IS_GLOBAL ? core : core[name] || (core[name] = {}); |
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var expProto = exports[PROTOTYPE] || (exports[PROTOTYPE] = {}); |
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var key, own, out, exp; |
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if (IS_GLOBAL) source = name; |
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for (key in source) { |
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// contains in native |
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own = !IS_FORCED && target && target[key] !== undefined; |
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// export native or passed |
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out = (own ? target : source)[key]; |
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// bind timers to global for call from export context |
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exp = IS_BIND && own ? ctx(out, global) : IS_PROTO && typeof out == 'function' ? ctx(Function.call, out) : out; |
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// extend global |
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if (target) redefine(target, key, out, type & $export.U); |
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// export |
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if (exports[key] != out) hide(exports, key, exp); |
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if (IS_PROTO && expProto[key] != out) expProto[key] = out; |
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} |
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}; |
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global.core = core; |
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// type bitmap |
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$export.F = 1; // forced |
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$export.G = 2; // global |
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$export.S = 4; // static |
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$export.P = 8; // proto |
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$export.B = 16; // bind |
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$export.W = 32; // wrap |
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$export.U = 64; // safe |
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$export.R = 128; // real proto method for `library` |
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module.exports = $export;
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