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Diffstat (limited to 'node_modules/core-js/modules/_bind.js')
| -rw-r--r-- | node_modules/core-js/modules/_bind.js | 25 |
1 files changed, 25 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 00000000..3cf1e5ae --- /dev/null +++ b/node_modules/core-js/modules/_bind.js @@ -0,0 +1,25 @@ +'use strict'; +var aFunction = require('./_a-function'); +var isObject = require('./_is-object'); +var invoke = require('./_invoke'); +var arraySlice = [].slice; +var factories = {}; + +var construct = function (F, len, args) { + if (!(len in factories)) { + for (var n = [], i = 0; i < len; i++) n[i] = 'a[' + i + ']'; + // eslint-disable-next-line no-new-func + 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); + var 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; +}; |
