I'm encountering an issue in my component where using the splice function on an array prop does not trigger the $emit event. Can anyone provide some insight into why this might be happening?
The removeItem method is called by clicking a button.
Thank you 🤚
Using the splice method does not trigger the set function on a computed property. To work around this, simply assign the computed property to itself after using the splice method.
this.customBenefitsObj = this.customBenefitsObj;
To illustrate this behavior, refer to the demo below where "Test" is only logged once.
Vue.config.productionTip = false;
Vue.config.devtools = false;
new Vue({
el: "#app",
computed: {
test: {
get() {
return [1, 2, 3, 4, 5];
},
set(v) {
console.log("Test");
}
}
},
mounted() {
this.test.splice(0, 1);
this.test = this.test;
}
});<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app"></div>When you use the splice method, it alters the content of customBenefitsObj, but not the array itself. For example:
this.customBenefitsObj = []
In this case, the set function of customBenefitsObj will be triggered, along with the emit function.
It is generally advised against mutating props directly. Instead, you should emit a modified copy of the array and replace it in a parent component. Alternatively, you can emit a remove operation along with the element to be removed (the actual removal process should ideally take place in the parent component).
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