With vuejs, only one place can control the changing of v-model

Hello, I am currently working on integrating VueJS2 code with Laravel Blade. However, I have encountered an issue with the following VueJS2 code:

new Vue({
    el:'.add_item_to_price_menu',
    data:{
        percentage:null,
    },
    methods:{
        searchData:function(){
            console.log(this.percentage);
        }
    }
});

In addition to this, here is my Blade code:

<input type='text' @keyup='searchData' v-model='percentage' id='percentage' placeholder='{{trans("language.percentage")}}' class='form-control parent' />

<input v-model='percentage' type='text' class='form-control child' />
<input v-model='percentage' type='text' class='form-control child' />

My goal is to change the values in every child when the parent class changes. While this functionality is working as expected, I do not want the changes made in a child to reflect in all other instances of the 'percentage' model. Is there a way to achieve this? Thank you.

Answer №1

An easy solution is to avoid using v-model and instead use :value=percentage.

v-model is essentially a shortcut for using a property and an event. According to the Vue documentation:

the component must:

  • Connect the value attribute to a value prop
  • Trigger its own custom input event when there's a new value input

Therefore, if you exclusively use :value, it results in one-way binding. Note that if a user modifies any of those inputs, it won't update your model.

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