GSTN-Node/node_modules/function-bind/implementation.js at master · letsdev1/GSTN-Node · GitHub

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'use strict';

/* eslint no-invalid-this: 1 */

var ERROR_MESSAGE = 'Function.prototype.bind called on incompatible ';

var slice = Array.prototype.slice;

var toStr = Object.prototype.toString;

var funcType = '[object Function]';

module.exports = function bind(that) {

var target = this;

if (typeof target !== 'function' || toStr.call(target) !== funcType) {

throw new TypeError(ERROR_MESSAGE + target);

}

var args = slice.call(arguments, 1);

var bound;

var binder = function () {

if (this instanceof bound) {

var result = target.apply(

this,

args.concat(slice.call(arguments))

);

if (Object(result) === result) {

return result;

}

return this;

} else {

return target.apply(

that,

args.concat(slice.call(arguments))

);

}

};

var boundLength = Math.max(0, target.length - args.length);

var boundArgs = [];

for (var i = 0; i < boundLength; i++) {

boundArgs.push('$' + i);

}

bound = Function('binder', 'return function (' + boundArgs.join(',') + '){ return binder.apply(this,arguments); }')(binder);

if (target.prototype) {

var Empty = function Empty() {};

Empty.prototype = target.prototype;

bound.prototype = new Empty();

Empty.prototype = null;

}

return bound;

};

GSTN-Node/node_modules/function-bind/implementation.js at master · letsdev1/GSTN-Node · GitHub

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