@node-click="handleNodeClick"

This is a Vue.js directive that is used to attach a click event listener to a DOM element.

The "node-click" in this example is a custom event name that is used to identify the specific click event being handled.

The "handleNodeClick" is the name of the method in the Vue.js component that is called when the "node-click" event is triggered.

For example, if you have a button in your Vue.js template and you want to handle the click event for that button, you can use the "node-click" directive to attach a click event listener to that button and specify the "handleNodeClick" method as the event handler.

Here's an example:

<template>
  <button v-node-click="handleNodeClick">Click me</button>
</template>

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

In this example, when the user clicks on the button, the "handleNodeClick" method will be called, and the message "Button clicked" will be logged to the console.