show/hide elements inside of for loop - vue.js

Question

I have the following:
<div v-for="num in [1,2,3,4,5]" :key="num ">
<customelement0 :num ="num" />
<span #click="show = !show" > Details: </span>
<customelement1 v-if="show" :num ="num" />
<hr />
</div>
and:
export default {
data() {
return {
show: false
};
},
};
However, in this implementation Whenever show changes it affects all of the customelement1s and will show/hide all of them.
How would one solve this problem, so that whenever a user clicks on the span it only shows/hides one element in the loop?
P.S.: in reality, the length of the loop is much longer, than what's indicated above

Answer 1

The problem here is essentially that your show is a variable for the entire component, and isn't linked to one of your array elements.
Generally, we don't really tend to hard-code an array into the html, but rather in the data, as shown in the other answers.
The other answers show it with num being coded into the object but you could also do something like this. Note that other field is optional and not required. The main advantage of this method is that you don't need to code every number.
<div v-for="(item, i) in items" :key="i">
<!-- Note I do i+1 so that it matches the 1,2,3 in your example -->
<!-- if you're okay with having 0,1,2 you can omit the +1 -->
<customelement0 :num="i+1" />
<span #click="item.show = !item.show" >Details: </span>
<customelement1 v-if="item.show" :num="i+1" />
<hr />
</div>
export default {
data() {
return {
items: [
{show: false, other: "foo"},
{show: false, other: "bar"},
//...
],
};
},
};

Answer 2

You can change number to object and toggle property:
<div id="app">
<h2>Todos:</h2>
<ol>
<li v-for="todo in todos">
<label>
<input type="checkbox"
v-on:change="toggle(todo)"
v-bind:checked="todo.done">
<del v-if="todo.done">
{{ todo.text }}
</del>
<span v-else>
{{ todo.text }}
</span>
</label>
</li>
</ol>
</div>
new Vue({
el: "#app",
data: {
todos: [
{ text: "1", done: false },
{ text: "2", done: false },
{ text: "3", done: true },
{ text: "4", done: true },
{ text: "5", done: true },
]
},
methods: {
toggle: function(todo){
todo.done = !todo.done
}
}
})

Answer 3

You can to save the value isShow for each element in the array. So you need to use an array of objects in you data and do something like this:
export default {
data() {
return {
numList: [
{
num: 1,
isShow: true
},
{
num: 2,
isShow: true
}
]
};
},
};
In your template:
<div v-for="item in numList" :key="item.num">
<customelement0 :num="item.num" />
<span #click="item.isShow = !item.isShow" > Details: </span>
<customelement1 v-if="item.isShow" :num="item.num" />
<hr />
</div>