call vs apply vs bind: Detailed Comparison
Side-by-side comparison of call, apply, and bind with use cases.
call vs apply vs bind: Detailed Comparison
| Feature | call | apply | bind |
|---|---|---|---|
| Invokes immediately | Yes | Yes | No |
| Arguments | Comma-separated | Array | Comma-separated (preset) |
| Returns | Result | Result | New function |
| Use case | Borrow methods | Array args | Fix this in callbacks |
When to Use call
When you need to invoke immediately with specific this and individual arguments:
Math.max.call(null, 1, 2, 3); // 3
When to Use apply
When you have arguments in an array:
Math.max.apply(null, [1, 2, 3]); // 3 const args = [1, 2, 3]; func.apply(context, args);
With spread, call with ...args works too, so apply is less necessary in modern JS.
When to Use bind
When you need a function with this permanently bound for later use:
const bound = obj.method.bind(obj); setTimeout(bound, 1000); // this is preserved
The Takeaway
Use call for immediate invocation with comma args. Use apply for array args (or use spread with call). Use bind for creating a function with permanent this binding for later use (callbacks, event handlers).
Use call when you have individual arguments. Use apply when you have arguments in an array. With spread syntax, call with ...args works too, making apply less necessary in modern JS.
When you need a function with this permanently bound for later use, like callbacks (setTimeout, event listeners) where this would otherwise be lost.
No. bind returns a new function with this bound. You must call it separately: const bound = fn.bind(obj); bound(). Re-binding a bound function has no effect on this.
Yes. func.apply(null, args) is equivalent to func.call(null, ...args) with spread. This makes apply less necessary in modern JS, but it is still useful for older codebases.
bind returns a new function with preset arguments for later use. call invokes immediately with all arguments. Use bind when you need to call later, call when you need to call now.
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