javascriptweb-componentstenciljsstencil-component

Stenciljs @Method not working

I'm struggling to get @Method in stenciljs working - any help would be appreciated.

Here's my component code with a function called setName that I want to expose on my component:

import { Component, Prop, Method, State } from "@stencil/core";

@Component({
  tag: "my-name",
  shadow: true
})
export class MyComponent {

  @Prop() first: string;
  @Prop() last: string;
  @State() dummy: string;

  @Method() setName(first: string, last: string): void {
    this.first = first;
    this.last = last;
    this.dummy = first + last;
  }
  render(): JSX.Element {
    return (
      <div>
        Hello, World! I'm {this.first} {this.last}
      </div>
    );
  }
}

Here's the html and script that references the component:

<!DOCTYPE html>
<html dir="ltr" lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=5.0">
  <title>Stencil Component Starter</title>
  <script src="/build/mycomponent.js"></script>

</head>
<body>

  <my-name  />

  <script>
    var myName = document.querySelector("my-name");
    myName.setName('Bob', 'Smith');
  </script>
</body>
</html>

Here's a screen shot of the error I'm getting which is Uncaught TypeError: myName.setName is not a function:

enter image description here

Solution

  • Methods are not immediately available on a component; they have to be loaded/hydrated by Stencil before you can use them.

    Components have a componentOnReady function that resolve when the component is ready to be used. So something like:

    var myName = document.querySelector("my-name");
myName.componentOnReady().then(() => {
  myName.setName('Bob', 'Smith');
});