JavaScript's equality check (==) failing to validate when two values are the same

Question

JavaScript's equality check (==) failing to validate when two values are the same

In the process of extracting a value from a JSON file, I encounter the following situation:

var sta = req.jsonBody.sta   //where req.jsonBody.sta = open

Based on this code snippet, my variable "sta" should be equal to "open". However, when I execute the following code:

var turnOn = true
var open = "open"
if (sta == open)
{
    turnOn = false
    console.log(sta)
}

console.log(turnOn)

The expected outcome is for the value of turnOn to be false. Surprisingly, the console is printing true instead. I am unsure about where I might have made an error.

javascript

Answer 1

Answer №1

Typically, everything seems to be functioning correctly.

req = {jsonBody:{sta:'open'}};

var sta = req.jsonBody.sta;

var turnOn = true;
var open = "open";
console.log('turnOn = '+turnOn);
if (sta == open)
{
    turnOn = false;
    //console.log(sta);
}
console.log('sta = '+sta);
console.log('turnOn = '+turnOn);

Until you encounter incorrect data, such as extra spaces that make it look like open, but in reality contain open.

req = {jsonBody:{sta:'open '}};

var sta = req.jsonBody.sta;

var turnOn = true;
var open = "open";
console.log('turnOn = '+turnOn);
if (sta == open)
{
    turnOn = false;
    //console.log(sta);
}
console.log('sta = '+sta);
console.log('turnOn = '+turnOn);

Answer 2

Typically, everything seems to be functioning correctly.

req = {jsonBody:{sta:'open'}};

var sta = req.jsonBody.sta;

var turnOn = true;
var open = "open";
console.log('turnOn = '+turnOn);
if (sta == open)
{
    turnOn = false;
    //console.log(sta);
}
console.log('sta = '+sta);
console.log('turnOn = '+turnOn);

Until you encounter incorrect data, such as extra spaces that make it look like open, but in reality contain open.

req = {jsonBody:{sta:'open '}};

var sta = req.jsonBody.sta;

var turnOn = true;
var open = "open";
console.log('turnOn = '+turnOn);
if (sta == open)
{
    turnOn = false;
    //console.log(sta);
}
console.log('sta = '+sta);
console.log('turnOn = '+turnOn);

JavaScript's equality check (==) failing to validate when two values are the same

Answer №1

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