That's why you call super(); as the first line in the constructor.
On Sun, Dec 28, 2014 at 2:42 PM, Антон Шувалов <[email protected]> wrote:
> 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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>
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