Why is the VUE prop not working?

Question

Vue.js

A component has been created that should accept a prop, the prop has a default value.
When you try to pass true to the prop, nothing changes, the value also remains false. What can be wrong?
Tried not to set default value

Vue.component('configurator', {
    props: {
        isLoading: {
          default: false
        }
    },
    template: '<div>{{ isLoading }}</div>' // <- Тут false, а должно быть true
})

<configurator :isLoading="true"/>

Answer 1

Because :) <configurator :is-loading="true"/>