Binding element 'index' implicitly has an 'any' type

Using the demo project of angular2-mdl as a guide I ported the tab component and tried to implement it as following:


import { Component } from '@angular/core';

@Component({
selector: 'my-dashboard',
templateUrl: './landing.my.html'
})
export class MyDashboard {
public activeIndex = 0;

public tabChanged({index}): void {
this.activeIndex = index;
}

}


and the template:

<mdl-tabs mdl-ripple mdl-tab-active-index="0" (mdl-tab-active-changed)="tabChanged($event)">
<mdl-tab-panel mdl-tab-panel-title="home">
<mdl-tab-panel-title>
<mdl-icon class="mdl-color-text--primary">home</mdl-icon><span>Home</span>
</mdl-tab-panel-title>
<mdl-tab-panel-content>
<ul>
<li>Stanis</li>
<li>Joffrey</li>
</ul>
</mdl-tab-panel-content>
</mdl-tab-panel>
<mdl-tab-panel mdl-tab-panel-title="something">
<mdl-tab-panel-title>
<mdl-icon class="mdl-color-text--primary">group_work</mdl-icon><span>Ontology</span>
</mdl-tab-panel-title>
<mdl-tab-panel-content>
<ul>
<li>Stanis</li>
<li>Joffrey</li>
</ul>
</mdl-tab-panel-content>
</mdl-tab-panel>
<mdl-tab-panel mdl-tab-panel-title="another">
<mdl-tab-panel-title>
<mdl-icon class="mdl-color-text--primary">list</mdl-icon><span>Cognitive</span>
</mdl-tab-panel-title>
<mdl-tab-panel-content>
<ul>
<li>Robert</li>
</ul>
</mdl-tab-panel-content>
</mdl-tab-panel>
<mdl-tab-panel mdl-tab-panel-title="else">
<mdl-tab-panel-title>
<mdl-icon class="mdl-color-text--primary">call_split</mdl-icon><span>Cognition</span>
</mdl-tab-panel-title>
<mdl-tab-panel-content>
<ul>
<li>Robert</li>
<li>Renly</li>
</ul>
</mdl-tab-panel-content>
</mdl-tab-panel>
<mdl-tab-panel mdl-tab-panel-title="last">
<mdl-tab-panel-title>
<mdl-icon class="mdl-color-text--primary">backup</mdl-icon><span>Streaming</span>
</mdl-tab-panel-title>
<mdl-tab-panel-content>
<ul>
<li>Joffrey</li>
<li>Myrcella</li>
<li>Tommen</li>
</ul>
</mdl-tab-panel-content>
</mdl-tab-panel>
</mdl-tabs>


I am using webpack and I get the following TypeScript error regarding implicit any types:

ERROR in [default] home/my-app-ui/src/app/landing.my.ts:10:23
Binding element 'index' implicitly has an 'any' type.


However the app displays the desired functionality, can someone explain how to fix this?

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