javascript - Detect invalid use of object members -


i have evaluator returns object saying whether or not show elements on page , contains on 50 individual evaluations. such, not easy eyeball detect invalid uses of object members. here simplified example of issue find tool me address:

var simpleexample = {     evaluationset1: {         foo: true     },     evaluationset2: {         bar: true     },     showbutton: null };  //accidental mis-use simpleexample.showbutton = simpleexample.evaluationset1.bar && simpleexample.evaluationset2.bar;

in above example, showbutton not evaluated , false because evaluationset1.bar not defined on object. correct syntax be:

simpleexample.showbutton = simpleexample.evaluationset1.foo && simpleexample.evaluationset2.bar;

is there tool can detect kind of invalid use-case? have tried jshint , jslint, neither seems able flag it.

use queue. if evaluation sequential , required, process evaluationset1 evaluationsetn, else throw error. is, provide no option access property of simpleexample. provide function can access evaluationset1 can begin process, , can complete process @ evaluationsetn.

main thread

const worker = new worker("worker.js");  function handlemessageevent(event) {   if (event.data) {     console.log("evaluation true", event.data)   } else {     console.log("evaluation false", event.data)   } }  worker.addeventlistener("message", handlemessageevent); worker.postmessage("evaluation");

worker thread

function handleworkerevent(event) {   let bool = true;   if (event.data !== "evaluate") {     bool = false;     self.postmessage(bool);     return;   }    (let prop of object.keys(simpleexample)) {     let curr = simpleexample[prop];     if (curr) {       let keys = object.keys(curr);       if (keys.length) {         (let key of keys) {          if (!curr[key]) {            bool = false;            break;          }         }       }     } else {       bool = false;        break;     }   }   self.postmessage(bool); }  self.addeventlistener("message", handleworkerevent);

data.js

const simpleexample = {     evaluationset1: {         foo: true     },     evaluationset2: {         bar: true     },     showbutton: null };

plnkr http://plnkr.co/edit/impuzjz14lcafmhhwdrx?p=preview


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