CODEWITHSUNDEEP
javascriptpolymerweb-componentdom-repeat
Jose Raul Perera
Jose Raul Perera

Reputation: 878

Fire a CustomEvent from element in dom-repeat

Hello I have this issue with a dom-repeat template. I have an element with a dom-repeat and inside I'm showing a my-item element, I have a button that fired a custom event and I need to get that event in the parent element but I can't make it work. Any thoughts on this? Why I never get updateFired(e) called?

Element: my-view

<template is="dom-repeat" items="{{employees}}">
      <my-item employee="[[item]]" on-update="updateFired"></my-item>
    </template>
    updateFired(e) {
      console.log(e);
    }

Element: my-item

<div class="container">
        <div>First name: <span>[[employee.first]]</span></div>
        <div>Last name: <span>[[employee.last]]</span></div>
        <button on-click="testClick">Click</button>
    </div>
    testClick(e) {
        const event = new CustomEvent('onUpdate', { bubbles: true, composed: true, detail: this.employee });
        this.dispatchEvent(event);
     }

Upvotes: 2

Views: 319

Answers (2)

Tiago Machado
Tiago Machado

Reputation: 170

On your HTML do something like:

<div id="foo" style="width:20px;height:20px;background-color:#ffcc00;" onclick="javascript:updateFired(event)"></div>

And in your javascript:

const el = document.getElementById('foo');
el.onclick = showFoo;


function showFoo() {
  alert('Clicked!');
}

Upvotes: 0

mishu
mishu

Reputation: 5397

In the way you wrote the event handler your event name should be "update", not "onUpdate". The on- prefix is added just for defining the event handler, the actual event name should be the part after it.

So you would need to change 

const event = new CustomEvent('onUpdate', { bubbles: true, composed: true, detail: this.employee });

to 

const event = new CustomEvent('update', { bubbles: true, composed: true, detail: this.employee });

Upvotes: 2

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