Exploring the Implementation of Prop Types in Vue.js using TypeScript

Check out this code snippet

<tr v-for="(item, index) in items">
        <td>{{ index + 1 }}</td>
        <td>{{ item.timestamp }}</td>
        <td>{{ item.type }}</td>
        <td>{{ item.message }}</td>
      </tr>



defineProps({
  items: {
    type: [Array],
    required: true
  }
})

Sample data for 'item' is as follows:

{ timestamp : "2024-05-07 08:51:06",
type : "INFO",
message : "Example message here"
}

I'm still learning about TypeScript and encountering a warning during build for 'item.timestamp', 'item.type' and 'item.message'

The warning states that 'item' is of type 'unknown'

What should be the correct type for 'items' in this case?

Answer №1

Assuming the type of log is defined

type LogEntry = {
  timestamp: string;
  logType: string;
  logMessage: string;
};

as answered in a previous question.

You have the ability to do this

const props = defineProps({
  logs: {
    type: Array as PropType<Array<LogEntry>>,
    required: true,
  },
});

Remember to import PropType.

import type { PropType } from 'vue';

Documentation

If you do not have a type/interface available, you can declare it directly like

logs: {
    type: Array as PropType<Array<{timestamp: string, logType: string, logMessage: string}>>,
    required: true,
  },

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