Guide on how to use Vue's watch feature to monitor a particular property within an array

I am interested in observing the "clientFilter" within an array

TableProduit: [ { nr_commande: 0, date_creation: "", id_delegue: "1", clientFilter: "" }
],

Answer №1

Here is an implementation based on the suggestion by Terry in the comments, utilizing computed properties and a watcher. This code constantly interacts with the first element in the TableProduit array - potentially requiring the usage of Array.prototype.find() to locate the appropriate object with a clientFilter property depending on your specific requirements. However, the precise objective of your inquiry remains unclear.

Type text into the input field to modify the clientFilter attribute and observe the console message triggered by the watcher.

new Vue({
  el: '#app',
  template: `<input type="text" v-model:value="TableProduit[0].clientFilter" />`,
  data: {
    TableProduit: [{
      nr_commande: 0,
      date_creation: "",
      id_delegue: "1",
      clientFilter: ""
    }],
  },
  computed: {
    clientFilter: {
      get: function() {
        return this.TableProduit[0].clientFilter;
      },
      set: function(newValue) {
        this.TableProduit[0].clientFilter = newValue;
      }
    }
  },
  watch: {
    clientFilter: function(newValue) {
      console.log(`clientFilter changed to "${newValue}"`);
    }
  }
});
Vue.config.productionTip = false;
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app"></div>

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