steps for implementing a custom text change event in aurelia

In Aurelia, the requirement is for the textchanged event Consumer to pass the event and not be in control. The Consumer will execute their code on the textchange event, while the Component simply exposes that event. How can this be created in Aurelia?

Component

textbox.html

<input type="text" class="form-control change.delegate="inputValueChange()">

textbox.ts

constructor() {

  }

  attached() {
    this.controller.validateTrigger = validateTrigger.changeOrBlur;
    this.controller.addRenderer(new BootstrapFormRenderer());
    this.controller.validate();
   } 

    public inputValueChange(newValue, oldValue){
      console.log(newValue)
      }
    }

app.html

<template>
<textbox  maxlength="10" autocomplete="on"></textbox>
<template>

Answer №1

If you want to create custom events, simply add this code to your textbox component constructor:

constructor(private element: Element) {}

Next, in the inputValueChange function, include something like this:

let event = new CustomEvent('textchange', { 
        detail: <some-data-you-want-to-send>,
        bubbles: true
    });

this.element.dispatchEvent(event);

After that, you can use the newly created textchange event as shown below:

<textbox maxlength="10" autocomplete="on" textchange.delegate="someFunction()"></textbox>

By the way, it seems in your example there is a missing quotation mark after form-control / before change.delegate, which may be causing inputValueChange not to trigger.

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