The condition is not functioning properly when the array's length is greater than 1

Within the primary controller, there is an if-else statement:

var entity = shareDataService.getModalEntity();

if (entity = "NULL" || entity.length === 1) {
    myDataPromise = getDataService.getDataFromREST(security);
    console.log("HERE")
} else {
    myDataPromise = $q.all(getDataService.keepICorrect(security));
    console.log("THERE")
};

The data for entities is retrieved from the shareDataService service.

Everything seems to be working fine when either entity.length === 1 or entity === "NULL". However, if the array length is 2 or greater, the condition does not pass through to the else branch. I have checked the value passed to the controller's function right before the if-else, and confirmed that the array indeed has a length of 2 or more as intended. Even when debugging entity.length just before the if-else, it displays the correct length of the array. What could I possibly be missing?

Answer ā„–1

You have been assigning values instead of comparing.

entity = "NULL"

It should be done like this:

entity == "NULL"

Suggestion:

Remember that in JavaScript, falsy values include null, '', undefined, 0, and NaN.

Therefore, try using the following condition:

if(!entity || entity.length === 1)

Answer ā„–2

let item = shareDataService.getModalEntity();

if (item == "NULL" || item.size === 1) {

It's important to remember the difference between using = instead of == or ===. By using a single equals sign, you are actually assigning the value of "null" to item, which then results in a truthy value. The || operator will short-circuit and since the first expression is truthy, the second part (size === 1) won't even be evaluated. This means that the true branch of the if statement will always be executed.

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