Making v-model:value lazy-CodePudding

I have a simple Vue component, which comes from a 3rd party package.

The component is a text editor, and I have to provide it with a value for it to render correctly.

<SomeComponent v-model:value="text" />

<script setup>
const props = {
    records: {
        type: Object,
    },
}
const text = computed(() => props.records.first())
</script>

Now, I want to update my database everytime the text property is changed.

watch(text, () => {
    //Post to database...
})

I don't, however, want to update the database on every keystroke - hence, I want to make the v-model lazy. This I am trying to do like this:

<SomeComponent v-model:value.lazy="text" />

However, this doesn't work. The code inside my watch method is being fired on every keystroke.

CodePudding user response：

As shown in the documentation, v-model is just some sugar syntax.

So that those are the same

<input v-model="text">

<input :value="text" @input="event => text = event.target.value">

If you want to have your component updated on the change event, you could then use something like this

<SomeComponent :value="text" @change="event => text = event.target.value" />

Or this one rather

<SomeComponent v-model.lazy="text" /> <!-- text is the getter and the setter here -->

As shown in the documentation: https://vuejs.org/guide/essentials/forms.html#lazy

If you want something even more advanced, you could look into debouncing your inputs (more work but it's kinda more clever into handling when to update the state).

CodePudding user response：

1) You do not need to use v-model:value="text", just v-model="text" is enough.

2) If you wanted the input to be lazy, without any extra functionality (like posting to DB on every change) then v-model.lazy="text" would be enough.

So if you wish to make it lazy and make a call to DB on every change, then you need to this:

<SomeComponent :value="text" @change="onChange">

<script setup>
const onChange = (event) {
  text.value = event.target.value;
  // post to DB
}
</script>

If this doesn't work, then the suspect is the 3rd party package. In which case I suggest you look at the package's documentation and see if they provide a prop for the text editor to be lazy.