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Diffstat (limited to 'node_modules/core-js/modules/_bind.js')
-rw-r--r-- | node_modules/core-js/modules/_bind.js | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/node_modules/core-js/modules/_bind.js b/node_modules/core-js/modules/_bind.js new file mode 100644 index 000000000..1f7b0174b --- /dev/null +++ b/node_modules/core-js/modules/_bind.js @@ -0,0 +1,24 @@ +'use strict'; +var aFunction = require('./_a-function') + , isObject = require('./_is-object') + , invoke = require('./_invoke') + , arraySlice = [].slice + , factories = {}; + +var construct = function(F, len, args){ + if(!(len in factories)){ + for(var n = [], i = 0; i < len; i++)n[i] = 'a[' + i + ']'; + factories[len] = Function('F,a', 'return new F(' + n.join(',') + ')'); + } return factories[len](F, args); +}; + +module.exports = Function.bind || function bind(that /*, args... */){ + var fn = aFunction(this) + , partArgs = arraySlice.call(arguments, 1); + var bound = function(/* args... */){ + var args = partArgs.concat(arraySlice.call(arguments)); + return this instanceof bound ? construct(fn, args.length, args) : invoke(fn, args, that); + }; + if(isObject(fn.prototype))bound.prototype = fn.prototype; + return bound; +};
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