I see several questions about callbacks: obviously, there is no callback involved here, and I'm struggling to see the relevance of any of the previous answers. I don't doubt that there is some relevance, just that none of the previous answers explain or demonstrate that relevance.
To be clear: I don't know how renaming a function by using a procedural variable changes context. That would be obvious if I was implementing a callback, but I'm not: I've not moved to the call to a different object by using a callback, and I don't know what the new context is, or how or why it changed.
I've got a function:
export default class Popup {
shower(label, value, valueList, saveEvent) {
let classInstance = this;
let domObjects = [ classInstance.dom.text(label, "p") ];
}
}
Which is called like this:
export default class Controller {
constructor(model, view) {
this.model = model;
this.view = view;
}
function fred(void){
fn=this.view.popup.shower;
fn(label, stat.value, lst, myOtherfn);
}
..But that doesn't work. If fails because, when called that way, there is something undefined about
classInstance.dom.text(label, "p")
(when called from the exact same place as a normal call, it works correctly)
function fred(void){
this.view.popup.shower(label, stat.value, lst, myOtherfn);
}
I don't know enough about javascript even to be dangerous. What does dom.text("mytext" , "p") mean? Apparently I get a different this.dom from the two call methods? And how can I use a variable procedure in a way that doesn't mess with context?
