jQuery callback - strict violation
callback, javascript, jquery, strict, this
Solution
I get the basic idea about this not being in a method when in strict mode...
Yes, but you're confusing two unrelated things: Strict mode, and JSLint. They're largely unrelated (except that JSLint has an option to require strict mode).
There's no problem with your code in strict mode. It's perfectly valid and appropriate (because of how jQuery uses `this`). Example There is no "strict violation" there.
JSLint doesn't like it, but JSLint doesn't like a lot of things that are perfectly valid and appropriate. JSLint detects a combination of things that are very widely-acknowledged to be problems (like missing semicolons), and things that Douglas Crockford doesn't like from a style perspective. Crockford's intelligent and well-informed, but not everyone agrees with his style choices.
Lint tools are very helpful, an essential part of the toolkit. JSLint is less helpful than it might be (in my view), by conflating substance issues with style issues (although granted it's a fine line, with JavaScript). You might consider using JSHint, a fork which gives you more control over what it checks.
Problem
I get the basic idea about `this` not being in a `method` when in `strict mode` outlined here, but it gets a bit erudite, to be honest. So, in more prosaic terms: I have a handler like so: ``` $('.myClass').one('keyup', function() { var $this = $(this); etc etc }); ``` I want to change it to this: ``` function myFunction () { var $this = $(this); etc etc }; $('.myClass1').one('keyup', myFunction); $('.myClass2').one('keyup', myFunction); etc ``` It doesn't like it because in `strict mode` because I'm using `this` outside of a method. I get that. However, I need to have `myFunction` separate to the handler, because (1) it's attached to various classes/elements and (2) I am using `.off().one('keyup', myFunction)` to reset the `one` handler for various classes at various points. So how do I get around having a separate callback function without violating the `this` business?