vuejs: @keyup.esc on div element is not working

Question

I'm expecting that 'close' event is fired when I'm clicking ESC button being on "shadow-modal" div, but it's not happening

vue 2.5.13, any ideas why?

    <template>
      <div class="shadow-modal"
         @keyup.esc="$emit('close')">
        <transition name="modal">
          <div class="modal-mask">
            <div class="modal-wrapper">
              <div class="modal-container">
                <div class="modal-header">
                  <slot name="header">
                    default header
                  </slot>
                </div>
                <div class="modal-body">
                  <slot name="body">
                    default body
                  </slot>
                </div>
                <div class="modal-footer">
                  <slot name="footer">
                    <a href="#"
                       class="btn btn--diagonal btn--blue"
                       @click="$emit('close')">Cancel</a>
                  </slot>
                </div>
              </div>
            </div>
          </div>
        </transition>
      </div>
    </template>

Answer 1

While it's not input element that you're trying to bind the keyborad events, they will not work unless you define a tabindex:

<div class="shadow-modal" @keyup.esc="$emit('close')" tabindex="0">

Here's a reference: https://www.w3.org/WAI/GL/WCAG20/WD-WCAG20-TECHS/SCR29.html

Answer 2

While DmitrySemenov solution works for me it's not the best solution when you have multiple modals on the page. I tried it and I discovered it fires close event for every modal.

I think the best way to do it is registering a "keyup" event when the modal is shown and deregistering it after hide. It gives you an advantage because the event is registered only when it's needed. To do it you need to add a watcher for "show" property:

  props: {
    show: {
      type: Boolean,
      default: false
    }
  },
  watch: {
    show() {   
      if (this.show === false) {
        window.removeEventListener("keyup", this.onEscapeKeyUp);
      } else {
        window.addEventListener("keyup", this.onEscapeKeyUp);
      }
    }
  },
  methods: {
    onEscapeKeyUp(event) {
      if (event.which === 27) {
        this.$emit("close");
      }
    }
  }

The modal should have v-if="show" that controls modal's visibility:

<div class="modal-mask" v-if="show" @click="$emit('close');">

Whole solution code (you can see it on codesandbox.io):

Modal.vue

<template>
  <transition name="modal">
    <div class="modal-mask" v-if="show" @click="$emit('close');">
      <div class="modal-wrapper" @click.stop>
        <div class="modal-container">
          <div class="modal-header"><slot name="header"></slot></div>
          <div class="modal-body"><slot name="body"></slot></div>
          <div class="modal-footer">
            <slot name="footer">
              <div class="buttons">
                <a class="button" href="#" @click.prevent="$emit('close');">
                  OK
                </a>
              </div>
            </slot>
          </div>
        </div>
      </div>
    </div>
  </transition>
</template>

<script>
export default {
  name: "Modal",
  props: {
    show: {
      type: Boolean,
      default: false
    }
  },
  watch: {
    show() {
      const body = document.querySelector("body");

      if (this.show === false && body.style.overflow === "hidden") {
        body.style.overflow = "";
        window.removeEventListener("keyup", this.onEscapeKeyUp);
      } else {
        body.style.overflow = "hidden";
        window.addEventListener("keyup", this.onEscapeKeyUp);
      }
    }
  },
  methods: {
    onEscapeKeyUp(event) {
      if (event.which === 27) {
        console.log("close event");
        this.$emit("close");
      }
    }
  }
};
</script>

<style lang="scss" scoped>
.modal-mask {
  position: fixed;
  z-index: 1100;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  overflow: auto;
  transition: opacity 0.3s ease;
  display: flex;
  justify-content: center;
  align-items: center;
}

.modal-wrapper {
  max-width: 980px;
  width: 100%;
}

.modal-container {
  padding: 1.5em 2em;
  background-color: white;
  border-radius: 2px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.33);
  transition: all 0.3s ease;
}

.wrapper {
  max-width: 980px;
}

.modal-body {
  margin: 1em 0;
}

.modal-enter {
  opacity: 0;
}

.modal-leave-active {
  opacity: 0;
}

.modal-enter .modal-container,
.modal-leave-active .modal-container {
  -webkit-transform: scale(1.1);
  transform: scale(1.1);
}
</style>

App.vue

<template>
  <div id="app">
    <button @click="show1 = true;">Show first modal</button>
    <button @click="show2 = true;">Show second modal</button>

    <Modal :show="show1" @close="show1 = false;">
      <div slot="header"><h1>First Modal</h1></div>
      <div slot="body">
        Lorem ipsum dolor sit amet consectetur, adipisicing elit. Rem beatae
        repellat dolores deleniti illum voluptatem facilis neque ut placeat,
        eius iusto tempore! Totam omnis non tempore perferendis expedita numquam
        neque!
      </div>
    </Modal>

    <Modal :show="show2" @close="show2 = false;">
      <div slot="header"><h1>Second Modal</h1></div>
      <div slot="body">
        Lorem ipsum dolor sit amet consectetur, adipisicing elit. Rem beatae
        repellat dolores deleniti illum voluptatem facilis neque ut placeat,
        eius iusto tempore! Totam omnis non tempore perferendis expedita numquam
        neque!
      </div>
    </Modal>
  </div>
</template>

<script>
import Modal from "./components/Modal";

export default {
  name: "App",
  components: {
    Modal
  },
  data() {
    return {
      show1: false,
      show2: false
    };
  }
};
</script>