How do you capture the value instead of the variable in a JavaScript closure?
Use let (creates a fresh binding per iteration), or an IIFE that passes the current value as a parameter (pass-by-value for primitives), or pass the value as an extra argument to setTimeout.
Verify This Answer
Cross-check this information using these trusted sources:
More FAQs in Closures Capture the Variable, Not the Value in JavaScript
The variable. A closure holds a reference to the variable, not a snapshot of its value. If the variable changes before the callback runs, the closure sees the updated value. This is why var in a loop logs the final value.
Because they all close over the same variable i. Closures capture the variable, not the value. When the callbacks run, i is the final value, so all callbacks log it.
It captures a new parameter (j), which is a copy of the value (for primitives). The closure inside the IIFE closes over j, not the outer i. So even if i changes later, j holds the value at the time of the IIFE call.
Still have questions?
Browse all our FAQs or reach out to our support team