Make Vuetify v-text-field component required by default - vue.js

Question

Currently, you can set rules that will work once the user changes the value of the input. For example:
Template part
<v-text-field
v-model="title"
label="Title"
></v-text-field>
Logic
export default {
data () {
return {
title: '',
email: '',
rules: {
required: value => !!value || 'Required.'
},
}
}
}
When the user focuses and removes focus from that element, or when the user deletes all its content, the required rule is triggered.
But what happens if we want to start with the rule enabled as soon as the component is mounted or created? Is there a way to achieve this?
I searched around vuetify but I could not find info about this nor examples in my humble google searches. I will appreciate help. I'm new in vue world. Thanks.

Answer 1

You could do the following:
Create a v-form and place your textfields inside the form. Don't forget to give your v-form a v-model and a ref too.
On mounted you can access the v-form via this.$refs and call .validate() just as Jesper described in his answer. In the codesandbox below you can see that the textfields immediately go red and display the "Required." text.
<v-form v-model="formValid" ref="myForm">
<v-text-field label="Field 1" :rules="rules.required"></v-text-field>
<v-text-field label="Field 2" :rules="rules.required"></v-text-field>
</v-form>
<script>
export default {
data() {
return {
formValid: false,
rules: {
required: [value => !!value || "Required."]
}
};
},
mounted() {
this.$refs.myForm.validate();
}
};
</script>
Example:

Answer 2

You should change your validation a little bit to achieve this.
<ValidationProvider rules="required" v-slot="{ errors }" ref="title">
<v-text-field
v-model="title"
label="Title"
></v-text-field>
</ValidationProvider>
And then you should call this.$refs.title.validate()
If you trigger this when mounted() is called, it should validate all the fields right away, as you're requesting.