discourse/app/assets/javascripts/admin/addon/components/admin-editable-field.gjs

import Component from "@ember/component";
import { on } from "@ember/modifier";
import { action } from "@ember/object";
import { tagName } from "@ember-decorators/component";
import DButton from "discourse/components/d-button";
import TextField from "discourse/components/text-field";
import { i18n } from "discourse-i18n";

@tagName("")
export default class AdminEditableField extends Component {
  buffer = "";
  editing = false;

  @action
  edit(event) {
    event?.preventDefault();
    this.set("buffer", this.value);
    this.toggleProperty("editing");
  }

  @action
  save() {
    // Action has to toggle 'editing' property.
    this.action(this.buffer);
  }

  <template>
    <div class="field">{{i18n this.name}}</div>
    <div class="value">
      {{#if this.editing}}
        <TextField
          @value={{this.buffer}}
          @autofocus="autofocus"
          @autocomplete="off"
        />
      {{else}}
        <a href {{on "click" this.edit}} class="inline-editable-field">
          <span>{{this.value}}</span>
        </a>
      {{/if}}
    </div>
    <div class="controls">
      {{#if this.editing}}
        <DButton
          class="btn-default"
          @action={{this.save}}
          @label="admin.user_fields.save"
        />
        <a href {{on "click" this.edit}}>{{i18n "cancel"}}</a>
      {{else}}
        <DButton class="btn-default" @action={{this.edit}} @icon="pencil" />
      {{/if}}
    </div>
  </template>
}