What is the best way to monitor a Vue instance property within a component?

I recently implemented a plugin that introduces a new property to the Vue instance. This property can then be accessed within components using this.$plugin.prop. However, I am encountering difficulty in watching for changes to this property. I need to perform actions within the component based on the value of this.$plugin.prop, but neither the watch nor this.$watch methods seem to work for me. It appears that these methods operate within the component context, making it challenging to watch for variables outside of the component.

    mounted() {
        this.$watch('$plugin.prop', val => console.log(val));
    }

How can I effectively handle this situation and keep track of changes to this.$plugin.prop?

javascriptvue.js

Answer №1

Instead of using mounted(), consider:

watch: {
   '$plugin.prop': function(value){
      console.log(value);
    }
}

For more information on watchers, refer to the official documentation in the Vue docs

Answer №2

One alternative to consider is using computed properties in the following manner:

computed: {
    pluginUpdated() {
        console.log(this.$plugin.property.value);
        return this.$plugin.property.value;
    }

To learn more about computed properties, check out this resource.

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