I am trying to display an image in Vue template using a prop that i passed through in my App.vue file.
App.vue:
<Header image='../assets/logo.png' />
Header.vue:
<template>
<div class="div-box">
<img :src={image} alt="Vue logo" />
</div>
</template>
<script>
export default {
name: "Header",
props: ["image"],
};
</script>
Thanks in advance!
You have to explicitly load the image "module":
<Header :image="require('../assets/logo.png')" />
vue-loader does this automatically for you for things like <img>, but if you've made your own component then you need to do it yourself.
Related
What is the difference between these two components in Nuxt3 and how do I use them correctly?
If I want to use pages/... what is the right approach here to create links and jump from page to page?
Everything is pretty much explained in the documentation: https://v3.nuxtjs.org/migration/pages-and-layouts/
You need to use this in app.vue
<template>
<nuxt-layout>
<nuxt-page /> <!-- used to display the nested pages -->
</nuxt-layout>
</template>
With a default /layouts/default.vue file
<template>
<div>
this is coming from the layout
<slot /> <!-- required here only -->
</div>
</template>
You will get this on / (with /pages/index.vue)
<template>
<div>index page</div>
</template>
And with the following structure, you will achieve dynamic pages
/pages/users/index.vue
<script setup>
definePageMeta({
layout: false
});
function goToDynamicUser() {
return navigateTo({
name: 'users-id',
params: {
id: 23
}
})
}
</script>
<template>
<div>
<p>
index page
</p>
<button #click="goToDynamicUser">navigate to user 23</button>
</div>
</template>
/pages/users/[id].vue
<script setup>
definePageMeta({
layout: false
});
const route = useRoute()
</script>
<template>
<pre>{{ route.params.id }}</pre>
</template>
I've removed the layout here to show how to disable it, but you can totally let the default here or even provide a custom one.
So, nuxt-page is to be used when you want to display the pages in your app (replacing <nuxt /> and <nuxt-child />) while <slot /> is to be used in the layout (as any other component using the slot tag).
Is it possible to pass as a prop when calling another component?
Essentially, I have components, and views, I build my views using various components. I want to have 1 styled component which I can reuse, so I was thinking to have a WebsiteLayout.vue:
<template>
<a-layout-content :style="{ padding: '0 24px', minHeight: '280px' }" />
{{ content }}
</template>
<script>
export default {
name: "View",
components: {
},
props: ["content"],
};
</script>
And in my App.vue:
<template>
<Content content=<router-view /> />
</template>
This isnt correct, but wondering if something like this is possible, and how I could achieve it?
With Vue 3 and Router 4, you can do something like
<router-view v-slot="{ Component }">
<SomeComponent>
<component :is="Component" />
</SomeComponent>
</router-view>
and then
//SomeComponent.js
<template>
<div class="wrapper">
<slot></slot>
</div>
</template>
here is an example with transition component as a wrapper for the router-view component
to know more about scoped slots you can see this
I am new to vueJS.
What I want to do is passing parameters to a component, depending on the selection of the routes. Here is my App.vue:
<template>
<div id="main">
<header>
<h1 style="color:red">{{msg}}</h1>
</header>
<div>
<aside class="sidebar">
<router-link v-for="el in this.$router.options.routes" :to="el">
{{el.name}}
</router-link>
</aside>
<SubMenu></SubMenu>
<div class="content">
<router-view></router-view>
</div>
</div>
</div>
</template>
<script>
import SubMenu from './components/SubMenu.vue'
export default {
components: {
'SubMenu': SubMenu
},
data() {
return {
msg: 'Welcome to Your Vue.js App' }
}
}
</script>
<style>
#import 'style.css';
#import 'grid.css';
</style>
and the SubMenu component I would like to make dynamic:
<template>
<div>
something dynamic
</div>
</template>
How can I pass some parameters to use in the component?
thank you
Your App.vue can be like this:
<template>
<div id="main">
<header>
<h1 style="color:red">{{msg}}</h1>
</header>
<div>
<aside class="sidebar">
<router-link v-for="el in this.$router.options.routes" :to="el">
{{el.name}}
</router-link>
</aside>
<SubMenu :menuTitle="subMenuTitle"></SubMenu>
<div class="content">
<router-view></router-view>
</div>
</div>
</div>
</template>
<script>
import SubMenu from './components/SubMenu.vue';
export default {
components: {
SubMenu
},
data() {
return {
subMenuTitle: "This is the sub menu",
msg: 'Welcome to Your Vue.js App'
}
}
}
</script>
<style>
#import 'style.css';
#import 'grid.css';
</style>
The SubMenu.vue component could be like this:
<template>
<div>
<h2>{{ menuTitle }}</h2>
something dynamic
</div>
</template>
<script>
export default {
name: "SubMenu",
props: {
menuTitle: String,
}
}
</script>
In the SubMenu component that was used in App.vue, notice the colon that appears before the menuTitle attribute. When you do that before an attribute, the value of that attribute would be evaluated by Vue and passed to the component. You can pass literal Javascript expressions or items in your App.vue component.
In the SubMenu component, you can use the props in whatever way you can. If the prop's value is an array, you can use the v-for directive with it to create a list of items in the SubMenu.
Welcome to SO,
In Vue.js passing parameters to components is called "Props"
You can pass props to your SubMenu like below
<SubMenu :id="12345" someText="Some Text About Something" :dataArray="[1,2,3,4,5]" />
then inside your SubMenu component you can define Prop Types as below
props: ['dataArray']
or
props: {
dataArray: {
type: Array,
default: []
}
}
After that you can use the data you passed to your liking
You can also read up on this Vue Documentation regarding the Props, which has much more detailed explanations about various Props related stuff and sample code
Ok many thanks to both.
But what if I would like to pass something that depends on the voices in router-link? I mean, router-link prints a menu with 4 voices...what if I would like a behavior like this:
click on voice1 in router-link ---> pass this object ['input1', 'input2'] to SubMenu
click on voice2 in router-link ---> pass this other object ['input3', 'input4', 'input5'] to SubMenu
and so on.
thanks again :)
I want to embed a checkbox inside a Vue3 Component and have the v-model binding passed down to the checkbox.
Inside the Component:
<!-- Tile.vue -->
<template>
<div>
<input type=checkbox v-model="$attrs">
</div>
</template>
<script>
export default {inheritAttrs: false}
</script>
Then in an outside file:
<template>
<Tile value="carrot" v-model="foods" />
<Tile value="tomatoes" v-model="foods" />
</template>
<script setup>
var foods = ref([]);
</script>
How do I achieve this?
The documentation says that v-model is just a shorthand for :modelValue and #update:modelValue but this is not universal as Vue obviously behaves differently for form elements such as smartly listening to onchange instead of oninput and modifying the property checked instead of value depending on the node.
If I use v-model on the outer component, how do I forward it to the checkbox and get the same smart behavior that Vue has?
I have found tons of controversial information. Some recommend using #input event (Vue 3 custom checkbox component with v-model and array of items). Some recommend emitting modelValue:update instead of update:modelValue (https://github.com/vuejs/core/issues/2667#issuecomment-732886315). Etc.. Following worked for me after hour of trial and error on latest Vuejs3
Child
<template>
<div class="form-check noselect">
<input class="form-check-input" type="checkbox" :id="id" :checked="modelValue" #change="$emit('update:modelValue', $event.target.checked)" />
<label class="form-check-label" :for="id"><slot /></label>
</div>
</template>
<script>
import { v4 as uuidv4 } from "uuid";
export default {
inheritAttrs: false,
emits: ["update:modelValue"],
props: {
modelValue: {
type: Boolean,
required: true,
},
},
setup() {
return {
id: uuidv4(),
};
},
};
</script>
Parent:
<Checkbox v-model="someVariable">Is true?</Checkbox>
you can verify that it works but doing this in parent:
var someVariable= ref(false);
watch(someVariable, () => {
console.log(someVariable.value);
});
p.s. The other solution above does not work for me. Author recommends using value property. But in example he passes v-model attribute. So I don't know exactly how it's supposed to work.
You can achieve the behavior by using emits to keep data in sync and behave as default v-model behavior. Checkbox component:
<template>
<div>
<input
type="checkbox"
:checked="value"
#change="$emit('input', $event.target.checked)"
/>
{{ text }}
</div>
</template>
<script>
export default {
name: "inputcheckbox",
props: ["value", "text"],
};
</script>
And in the parent component you can have as many checkboxes you want.
<template>
<div id="app">
<maincontent :showContent="showContent" />
<inputcheckbox text="one" v-model="checkedOne" />
<inputcheckbox text="two" v-model="checkedTwo" />
</div>
</template>
Here is a vue 2 example but is applicable to vue 3 as well. Hope this was helpful. Sandbox with this behavior:
https://codesandbox.io/embed/confident-buck-kith5?fontsize=14&hidenavigation=1&theme=dark
I've been trying to pass a prop to a component, which is a URL to an image for Section component to update v-bind:src of dom img tag, but somehow the image does not show up.
I can't see what's wrong.
File: App.vue
<template>
<div id="app">
<Section img="../assets/linux.png" />
</div>
</template>
<script>
import Section from "./components/Section.vue";
export default {
name: "app",
components: {
Section
}
};
</script>
File: Section.vue
<template>
<div>
<img :src="img" />
</div>
</template>
<script>
export default {
props: {
img: String
}
};
</script>
I suspect that the issue is due to the relative path you are using. I assume that ../assets/linux.png resolves to the right image URL with respect to App.vue, but it actually needs to resolve to the right image with respect to your <Section> component.
Based on what I can tell from the code you've shared, It seems like you can solve this by updating App.vue as follows:
<template>
<div id="app">
<Section img="../../assets/linux.png" />
</div>
</template>
...
I should, however, point out that you are getting absolutely no benefit from passing the image source as a prop like this. Since it is not bound to a reactive data property in App.vue, you may as well just omit that prop altogether.