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ES6 spec-compliant Object.assign shim. Fromhttps://github.com/es-shims/es6-shim
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ljharb/object.assign
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An Object.assign shim. Invoke its "shim" method to shim Object.assign if it is unavailable.
This package implements thees-shim API interface. It works in an ES3-supported environment and complies with thespec. In an ES6 environment, it will also work properly withSymbols.
Takes a minimum of 2 arguments:target andsource.Takes a variable sized list of source arguments - at least 1, as many as you want.Throws a TypeError if thetarget argument isnull orundefined.
Most common usage:
varassign=require('object.assign').getPolyfill();// returns native method if compliant/* or */varassign=require('object.assign/polyfill')();// returns native method if compliant
varassert=require('assert');// Multiple sources!vartarget={a:true};varsource1={b:true};varsource2={c:true};varsourceN={n:true};varexpected={a:true,b:true,c:true,n:true};assign(target,source1,source2,sourceN);assert.deepEqual(target,expected);// AWESOME!
vartarget={a:true,b:true,c:true};varsource1={c:false,d:false};varsourceN={e:false};varassigned=assign(target,source1,sourceN);assert.equal(target,assigned);// returns the target objectassert.deepEqual(assigned,{a:true,b:true,c:false,d:false,e:false});
/* when Object.assign is not present */deleteObject.assign;varshimmedAssign=require('object.assign').shim();/* or */varshimmedAssign=require('object.assign/shim')();assert.equal(shimmedAssign,assign);vartarget={a:true,b:true,c:true};varsource={c:false,d:false,e:false};varassigned=assign(target,source);assert.deepEqual(Object.assign(target,source),assign(target,source));
/* when Object.assign is present */varshimmedAssign=require('object.assign').shim();assert.equal(shimmedAssign,Object.assign);vartarget={a:true,b:true,c:true};varsource={c:false,d:false,e:false};assert.deepEqual(Object.assign(target,source),assign(target,source));
Simply clone the repo,npm install, and runnpm test
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ES6 spec-compliant Object.assign shim. Fromhttps://github.com/es-shims/es6-shim
