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Vue 3.0 key modifiers

In Vue 3.0, key modifiers are used with keyboard event listeners to react to specific keys. Vue provides several key modifiers for common keys, like .enter, .tab, .esc, .space, etc. They're a very useful feature for handling keyboard events and improving the user experience and accessibility.

Here's a simple tutorial on how to use key modifiers in Vue 3:

Step 1: Initialize your Vue project.

Create a new Vue 3 project using the Vue CLI.

vue create my-project

Remember to choose Vue 3 when asked which version of Vue to use.

Step 2: In your App.vue file (or any other component), add an input field and a method that will be triggered when the Enter key is pressed.

Here's an example:

<template>
  <div class="app">
    <input type="text" v-model="message" @keyup.enter="submit" />
  </div>
</template>

<script>
export default {
  data() {
    return {
      message: ''
    }
  },
  methods: {
    submit() {
      console.log(this.message);
      this.message = '';
    }
  }
}
</script>

In this example, the v-model directive is used to bind the message data property to the input field. The @keyup.enter listener is added to the input field to call the submit method when the Enter key is pressed. The submit method logs the message and then clears it.

Step 3: Run your application.

You can run your Vue 3 application with the following command:

npm run serve

Now when you type into the input field and press the Enter key, you should see the entered message logged in the console and the input field is cleared.

This is a basic usage of key modifiers in Vue 3.0. Key modifiers are very useful for handling keyboard events without having to manually check the key code of every key press event. You can find a list of all available key modifiers in the Vue.js documentation.

Handling Keyboard Events in Vue 3.0:

Description: Vue 3.0 provides the v-on directive to handle various events, including keyboard events.

Code Example:

<!-- MyComponent.vue -->
<template>
  <input v-on:keyup="handleKeyUp">
</template>

<script>
export default {
  methods: {
    handleKeyUp(event) {
      console.log('Key pressed:', event.key);
    },
  },
};
</script>

Vue 3.0 keyup Event Modifiers:

Description: Use key modifiers to handle specific key events.

Code Example:

<!-- MyComponent.vue -->
<template>
  <input v-on:keyup.enter="handleEnterKey">
</template>

<script>
export default {
  methods: {
    handleEnterKey() {
      console.log('Enter key pressed');
    },
  },
};
</script>

Event Handling with Vue 3.0 Key Codes:

Description: Use key codes to identify specific keys in event handlers.

Code Example:

<!-- MyComponent.vue -->
<template>
  <input v-on:keyup="handleKeyUp">
</template>

<script>
export default {
  methods: {
    handleKeyUp(event) {
      if (event.keyCode === 13) {
        console.log('Enter key pressed');
      }
    },
  },
};
</script>

Using Key Modifiers in Vue.js 3.0:

Description: Vue 3.0 provides key modifiers like .ctrl, .alt, and .shift to handle events with specific modifier keys.

Code Example:

<!-- MyComponent.vue -->
<template>
  <input v-on:keyup.ctrl="handleCtrlKey">
</template>

<script>
export default {
  methods: {
    handleCtrlKey() {
      console.log('Ctrl key pressed');
    },
  },
};
</script>

Vue 3.0 Keyboard Shortcut Handling:

Description: Combine key modifiers to handle keyboard shortcuts.

Code Example:

<!-- MyComponent.vue -->
<template>
  <input v-on:keyup.ctrl.enter="handleCtrlEnter">
</template>

<script>
export default {
  methods: {
    handleCtrlEnter() {
      console.log('Ctrl + Enter pressed');
    },
  },
};
</script>

Vue 3.0 v-on key Modifiers:

Description: Use the v-on directive with key modifiers to handle specific key events.

Code Example:

<!-- MyComponent.vue -->
<template>
  <input v-on:keyup.enter="handleEnterKey">
</template>

<script>
export default {
  methods: {
    handleEnterKey() {
      console.log('Enter key pressed');
    },
  },
};
</script>

Vue 3.0 Custom Key Modifiers:

Description: Create custom key modifiers for specific use cases.

Code Example:

<!-- MyComponent.vue -->
<template>
  <input v-on:keyup.custom="handleCustomKey">
</template>

<script>
export default {
  methods: {
    handleCustomKey() {
      console.log('Custom key pressed');
    },
  },
};
</script>

Handling Multiple Key Modifiers in Vue 3.0:

Description: Combine multiple key modifiers to handle complex key events.

Code Example:

<!-- MyComponent.vue -->
<template>
  <input v-on:keyup.ctrl.alt="handleCtrlAltKey">
</template>

<script>
export default {
  methods: {
    handleCtrlAltKey() {
      console.log('Ctrl + Alt key pressed');
    },
  },
};
</script>

Vue 3.0 keydown Event Modifiers:

Description: Use the keydown event and its modifiers to handle key presses.

Code Example:

<!-- MyComponent.vue -->
<template>
  <input v-on:keydown.enter="handleEnterKeyDown">
</template>

<script>
export default {
  methods: {
    handleEnterKeyDown() {
      console.log('Enter key down');
    },
  },
};
</script>

Vue 3.0 Mouse Event Key Modifiers:

Description: Some key modifiers can be applied to mouse events, such as .left, .right, and .middle.

Code Example:

<!-- MyComponent.vue -->
<template>
  <div v-on:click.middle="handleMiddleClick">Middle Click</div>
</template>

<script>
export default {
  methods: {
    handleMiddleClick() {
      console.log('Middle click');
    },
  },
};
</script>

Vue 3.0 Event Propagation and Key Modifiers:

Description: Control event propagation using .stop and .prevent modifiers.

Code Example:

<!-- MyComponent.vue -->
<template>
  <button v-on:click.prevent="handleClick">Click Me</button>
</template>

<script>
export default {
  methods: {
    handleClick() {
      console.log('Button clicked');
    },
  },
};
</script>