VueJS understanding scoped slots(finally)

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Just like many other things which I felt like I have understood, but as there is a saying, you truly learn by doing.
I implemented scoped slots in VueJS finally and understood their working.

How slots work:

Slots usually run in the same scope as the component in which you write them.
Example:

data-list.vue

<template>
    <div>
        <table-component>
            <template slot="filters">
                <button type="button" class="btn btn-primary" data-toggle="button" @click="filterData" aria-pressed="false"
                    autocomplete="off">
                    {{button}}
                </button>
            </template>
        </table-component>
    </div>
</template>

<script>
//Vue instance related code
</script>

We have a <table-component> component which contains a slot.
In the slot,filterData method is called when ever the button is clicked. This filterData method should exist in scope of data-list.vue component somewhere.
But what if you want to call filterData method which is inside the <table-component>

Enter scoped slots

In your <table-component> you can instead define the scope for the incoming slot.
Example:

table-component.vue

<template>
    <div>
        <div class="collapse" id="filters">
            <slot name="filters" v-bind:fetchData="fetchData"></slot>
        </div>
    </div>
</template>

<script>
// code table-component vue instance
</script>

You can see that we have used v-bind:fetchData="fetchData" on the slot inside the template.
This will make the fetchData method to be available to any slot which is passed to this component.

Now we can change our code in data-list.vue to be:

<template>
    <div>
        <table-component :dataSource="this.dataSource" :columns="this.columns" :filters="this.filters" @setFiltersData="setFiltersData">
            <template slot="filters"  slot-scope="slotProps">
             <button type="button" class="btn btn-primary" data-toggle="button"  
                         @click="slotProps.filterData" aria-pressed="false" autocomplete="off">
                            {{button}}
                        </button>
            </template>
        </table-component>
    </div>
</template>

We added slot-scope="slotProps" , this will make slotProps be available with the object passed in from the <table-component>. We passed fetchData from <table-component>, which is now available to use within slot code as slotProps.fetchData.  We can use this now with our button click and it will call the correctfetchData method i.e the fetchData defined inside the table-component component.

Yup it was simple 😉 (now I can say that)

 

 

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