Sometimes there is a requirement to use _this

[softwarespot]

In the ES5 document it mentions using _this, but in ES6 it states () => {};. Surely there are occasions where _this is required? I use it sporadically of course, but I use it still.

[ljharb]

Can you think of one? I can't.

[softwarespot]

This (pardon the pun) maybe...

App = {
    init: function () {
        // Init
        this.cacheDom(); // OK
    },
    cacheDom: function () {
        // Cache DOM
    },
    render: {
        page1: function () {
            // Need to re-cache DOM nodes
            // this.cacheDom(); // Doesn't work as this is referencing render.

            var _this = App.render;
            _this.cacheDom(); // This works
        },
        page2: function () {

        },
        page3: function () {

        }
    }
}

[ljharb]

In that scenario, App.render.cacheDom() works just fine. Using _this or self is for when you need to capture this for use in a closure - that doesn't apply to your scenario.

[softwarespot]

Fair point. I can't really think of a concrete scenario right now (checked my code and seems I don't use it apart from what I mentioned above.) Thanks