Conditions in loops in Vue

When looping through elements, you can impose conditions. But the v-for and v-if directives must be written on different tags, otherwise there will be a conflict. To avoid a conflict, the v-for directive is applied to the template tag, and the v-if directive is applied directly to the inserted tag.

Let's look at an example. Let's say we have the following array:

data() {
	return {
		arr: [1, 2, 3, 4, 5],
	}
}

Let's iterate over this array using a loop:

<template>
	<ul>
		<li v-for="elem in arr">
			{{ elem }}
		</li>
	</ul>
</template>

Now let's impose a condition on the elements to be shown:

<template>
	<ul>
		<template v-for="elem in arr">
			<li v-if="elem % 2 === 0">
				{{ elem }}
			</li>
		</template>
	</ul>
</template>

The following array is given:

data() {
	return {
		items: [1, -2, 3, -4, 5],
	}
}

Loop through this array and print only the positive elements of the array.