Efficient Indexing of JSON Object Key in JavaScript

This question can have two meanings
1. If the value is false or does not exist (also false) it does not matter - set the result to false.
OR
2. You want to know if the key exists - even it if it has a false value

For both you can use the hasOwnProperty() function

There are two ways to get the value or false if the key does not exist. One using hasOwnProperty and the other using the || (OR) operator

var v = botwts['abc'] || false;
var x = botwts['notthere'] || false;
console.log(v,x);
// Alternatively
var x = botwts.hasOwnProperty('abc') ? botwts['abc'] : false;

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If the key does not exist - then the x/y variables will get the value false.

If however you want to know if the key exists then

if (botwts.hasOwnProperty('abc')) {
   // do something with the knowledge that the key exists even if it is false
}
else {
  // key does not exist
}

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Any issue with this approach ( x = actionHash)? My main concern is speed and efficiency here.

var keyVal = (typeof botwts == "undefined") ? false : botwts[actionHash] || false;

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Thanks!

Thank you all!