JavaScript

I’ve already seen the answers to this question, but it’s not the solution I need, since it’s for jQuery, and I need something for vue.js.

So far, I was able to detect single character presses using the ff. code:

export default {
  name: 'game',

  data () {
    return {
      allowInput: false,
      disabledKeys: ['ArrowLeft', 'Home', 'Control']
    }
  },

  methods: {
    keymonitor: function (event) {
      console.log(event.key)
      
      if (this.disabledKeys.indexOf(event.key) >= 0) {
        event.preventDefault()
        this.allowInput = false
        // alert('not allowed')
      } else {
        this.allowInput = true
      }
    },

    checkAnswer () {
      if (! this.allowInput) {
        alert('the key(s) you pressed is/are not allowed')
      }
    } /* END checkAnswer */
  } /* END methods */
} /* END export default */

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.2.2/vue.min.js"></script>

<input id="typeBox" ref="typeBox" autocomplete="off" placeholder="Type here..."
       @keydown="keymonitor" @keyup="checkAnswer()" />

The code above successfully prevents the textbox from accepting ArrowLeft, Home, and Control key presses.

The problem:

I’m trying to figure out how to detect Ctrl+V, because I want to prevent paste action in my text box. Does anyone know how to do this? Thanks in advance.

Answer

To detect two keys, Vue provides modifier keys, For example to detect Alt+C, you can simply do:

<input @keyup.alt.67="YourFn">

Similarly for Ctrl+V, you can do:

<input @keyup.ctrl.76="YourFn">

As I can see here, ASCII code for Ctrl+v is 22, so you should be simply able to do :

<input @keyup.22="YourFn">

VueJS – How to detect Ctrl+V?

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Answer