1. v-once for single rendering
2. bind to classes not to styles:
:class="['txt', 'msg']" instead of :style="{ color: '#c3f1a9' }"
3. .once - event modifier for single event handler invokation
.self - only trigger handler if event.target is the element itself
i.e. not from a child element
for defining custom key modifiers use:
Vue.config.keyCodes = {
f1: 112
}