Hi, guys! I'm confused with class properties. With prototype chains I can setup
kinda default values which being replaced by values from children. But
replacing become hard to work with classes. For example, we have simple module,
some backbone view:
```js
class BaseView extends Backbone.View {
constructor() {
this.tagName = 'div';
super(); // create element from this.tagName value
}
}
```
And now we create inherited view:
```js
class Span extends BaseView {
constructor() {
this.tagName = 'span'
super();
}
}
```
But all `this` variables will be replaced by parent, not by child. It's kinda
weird. Another example with prototype chains works fine:
```js
var BaseView = Backbone.View.extends({
tagName: 'div'
})
```
```js
var Span = Backbone.View.extends({
tagName: 'span'
});
```
How I can do similar things with es6 classes? Sorry if this question is already
discussed.
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