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yy-dev7/optionalChaining.js

Created March 21, 2017 08:23
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optionalChaining.js
function optionalChaining(obj, chain) {
return chain
.split('.')
.reduce(function(acc, val) {
return acc ? acc[val] : undefined;
}, obj);
}
var user = { address: { street: 'No.969 West WenYi Road', }, a: { b: { c: 2 } }, }
var ret = optionalChaining(user, 'address');
console.log(ret)
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