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JavaScript JavaScript Loops, Arrays and Objects Tracking Data Using Objects The Student Record Search Challenge Solution

Posted by Nina Maxberry
Nina Maxberry
10,630 Points

Null in Part 3 of Challenge The console shows the null value but won't the prompt stop anyway?

while (true) { search = prompt('Search student records: type a name [Jody] (or type "quit" to end)'); if (search === null || search.toLowerCase() === 'quit') { break; }

Not sure of null's purpose.

1 Answer

KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,971 Points

If the user clicks cancel search will be null. Without checking for null the line console.log("Did I execute?") below will not run because there will be an error in attempting to convert null to lowercase. 

while (true) {
    search = prompt('Search student records: type a name [Jody] (or type "quit" to end)');
    console.log(search)
    if (search.toLowerCase() === 'quit') {
        console.log("Did I execute?")
        break; 
    }
}
Nina Maxberry
Nina Maxberry
10,630 Points

Ohhh, I get it. Lightbulb moment!