What is the proper method to refresh a single component from another in Vue.js?

Recently, I encountered the following scenario with a select element:

  <select @change="getValuesFromDate($event)">
                        <option value="1">Last 24 hours</option>
                        <option value="7">Last 7 days</option>
                        <option value="30">Last 30 days</option>
                        <option>Custom date</option>
                    </select>

Additionally, there is a chart component in play:

                          <graph-component
                                :key="graphKey"
                                v-bind="measurement"
                                :value="valueOfMeasurement(measurement)"
                                :time_date="dateOfMeasurement()"
                            ></graph-component>

The function getValuesFromDate($event) triggers an API call:

   getValuesFromDate(event) {
        let apiLink ="https://api.thingspeak.com/channels/1111111/feeds.json?api_key=XXXXXXXXXXXX&days=" +event.target.value +"&round=2&average=";
        let preferableSize = 0;
        if (event.target.value == 1) {
            preferableSize = 60;
        } else {
            preferableSize = 1440;
        }
        try {
            axios
                .get(apiLink + preferableSize, {
                    withCredentials: false
                })
                .then(response => {
                    this.message = response.data;
                });
            this.graphKey+= 1;
        } catch (error) {}
    }

Upon changing the select option and calling this function, the graph-component is re-rendered by modifying its key. This method seems to be working effectively. Would you suggest any alternative approach that might be considered more efficient and correct than the current one?

Answer №1

Hey @Lube, I've found that the most effective method to trigger a component re-render is by using a specific key property. I've had to employ this technique before for my graph components when modifications were made to the underlying data.

If you're curious about other strategies for forcing a re-render, there's a fantastic article I can share with you. It discusses different approaches but ultimately concludes that utilizing a :key attribute within your component is the optimal solution.

You can check out the article here.

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