35 lines
725 B
Markdown
35 lines
725 B
Markdown
```
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webpack:///../lib/@avocado/packages/entity/trait.js?:29
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entity.on("".concat(type, ".trait-").concat(traitType), listeners[type], this);
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```
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This is because you subclassed `Trait` but forgot to pass through the arguments
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from your subclass constructor to the superclass constructor. Always default
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to writing your Trait definition like:
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```
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class MyTrait extends Trait {
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initialize() {
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// ...
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}
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}
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```
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All trait initialization should be done in `initialize`.
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If you need really need to access arguments in your subclass constructor, opt
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to pass along `arguments` instead, such as:
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```
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class MyTrait extends Trait {
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constructor(entity, params, state) {
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super(...arguments);
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// ...
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}
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}
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```
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