This is my custom checkbox component:
<template>
<label class="checkbox">
<input
type="checkbox"
:checked="isChecked"
#change="change"
>
<span />
<slot />
</label>
</template>
<script>
export default {
name: 'Checkbox',
model: {
prop: 'selectedValues',
event: 'change'
},
props: {
value: {
type: String,
required: true
},
selectedValues: {
type: Array,
default: null
},
checked: {
type: Boolean,
default: false
}
},
computed: {
isChecked() {
return this.selectedValues.includes(this.value);
}
},
created() {
if(this.checked) {
const selectedValues = this.selectedValues;
selectedValues.push(this.value);
this.$emit('change', selectedValues);
}
},
methods: {
change() {
const selectedValues = Array.from(this.selectedValues).slice();
const found = selectedValues.indexOf(this.value);
if (found !== -1) {
selectedValues.splice(found, 1);
} else {
selectedValues.push(this.value);
}
this.$emit('change', selectedValues);
}
}
};
</script>
<style lang="scss">
label.checkbox {
position: relative;
user-select: none;
display: inline-flex;
cursor: pointer;
input {
display: none;
&:checked ~ span {
background: #EEE;
&:after {
visibility: visible;
}
}
}
span {
width: 25px;
height: 25px;
border: 1px solid #EEE;
display: inline-block;
transition: all linear 0.3s;
margin-right: 5px;
&:after {
content: "";
position: absolute;
top: 3px;
left: 9px;
border-bottom: 3px solid #FFF;
border-right: 3px solid #FFF;
height: 13px;
width: 5px;
transform: rotate(45deg);
visibility: hidden;
}
}
}
</style>
Inside my form:
<Checkbox
v-model="selectedBrands"
value="bmw"
checked
>
BMW
</Checkbox>
<Checkbox
v-model="selectedBrands"
value="audi"
checked
>
Audi
</Checkbox>
<Checkbox
v-model="selectedBrands"
value="mazda"
>
Mazda
</Checkbox>
computed: {
selectedBrands: {
get() {
return this.$store.state.selectedBrands;
},
set(value) {
this.$store.commit('setSelectedBrands', {selectedBrands: value});
}
}
}
Vuex store:
export default new Vuex.Store(
{
strict: process.env.NODE_ENV !== 'production',
state: {
selectedBrands: []
},
mutations: {
setSelectedBrands(state, payload) {
state.selectedBrands = payload.selectedBrands;
},
}
});
This actually works, but I get vuex error: Error: [vuex] do not mutate vuex store state outside mutation handlers.
However I can change the created() hook in my checkbox component like this:
created() {
if(this.checked) {
const selectedValues = Array.from(this.selectedValues).slice();
selectedValues.push(this.value);
this.$emit('change', selectedValues);
}
}
The vuex error will go away, but only the last checkbox component (with checked prop) will be checked (in this example Audi).
My guess is this happens, because components are rendering asynchronically? Would be happy to hear correct explanation.
My goal is to create a custom checkbox component that supports multiple checkbox v-model array binding (using vuex!) + setting the initial checked state.
I've spent many hours trying to figure out the proper solution. Will be very thankful for your time and help! Thank you in advance!
Your approach will not work - you want the custom checkbox to modify its v-model based on its checked property. But all checkboxes will see the same (empty) selectedValues from the store at the time they emit the change event in created hook. So they will all emit arrays with a single value - their own value. The end result will be that only the last checkbox will become selected - since the computed setter in the parent will be called only after all checkboxes have been created.
If you want to get rid of the mutation error and your checkboxes still working - you should not rely on the checked prop to set their initial value but only rely on the v-model. Therefore, if you want to set them all checked initially - set the Vuex state in your parent component.
Related
MCVE
I have a Tabpane component that takes slots as input. When imported from the template it works as expected.
<Tabpane>
<div caption="I am div 1">Div 1</div>
<div caption="I am div 2">Div 2</div>
</Tabpane>
However when imported from an other component ( Composite in the example ), then it triggers the following warning:
Slot "default" invoked outside of the render function:
this will not track dependencies used in the slot. Invoke the slot function inside the render function instead.
// src/components/Composite.js
import { defineComponent, h } from "vue";
import Tabpane from "./Tabpane.vue";
export default defineComponent({
name: "Composite",
setup() {
const slots = [
h("div", { caption: "I am div 1" }, ["Div 1"]),
h("div", { caption: "I am div 2" }, ["Div 2"])
];
return () => h(Tabpane, {}, () => slots);
}
});
Solved.
The problem was that I called slots.default() from within setup, but not within the returned render function.
Also this component reflected a very beginner approach to reactivity. By now I know better. The old problematic solution is still there in src/components/Tabpane.vue.
The right solution that triggers no warning is:
// src/components/Tabpane2.vue
<script>
import { defineComponent, h, reactive } from "vue";
export default defineComponent({
name: "Tabpane2",
props: {
width: {
type: Number,
default: 400,
},
height: {
type: Number,
default: 200,
},
},
setup(props, { slots }) {
const react = reactive({
selectedTab: 0,
});
return () =>
h("div", { class: ["vertcont"] }, [
h(
"div",
{
class: ["tabs"],
},
slots.default().map((tab, i) =>
h(
"div",
{
class: {
tab: true,
selected: i === react.selectedTab,
},
onClick: () => {
react.selectedTab = i;
},
},
[tab.props.caption]
)
)
),
h(
"div",
{
class: ["slotscont"],
style: {
width: `${props.width}px`,
height: `${props.height}px`,
},
},
slots.default().map((slot, i) =>
h(
"div",
{
class: {
slot: true,
active: react.selectedTab === i,
},
},
[slot]
)
)
),
]);
},
});
</script>
<style>
.tab.selected {
background-color: #efe;
border: solid 2px #afa !important;
border-bottom: transparent !important;
}
.tab {
background-color: #eee;
}
.tabs .tab {
padding: 5px;
margin: 2px;
border: solid 2px #aaa;
border-radius: 8px;
border-bottom: transparent;
cursor: pointer;
user-select: none;
transition: all 0.5s;
color: #007;
}
.tabs {
display: flex;
align-items: center;
margin-left: 5px;
}
.vertcont {
display: flex;
flex-direction: column;
margin: 3px;
}
.slotscont {
position: relative;
overflow: scroll;
padding: 5px;
border: solid 1px #777;
}
.slot {
visibility: hidden;
position: absolute;
}
.slot.active {
visibility: visible;
}
</style>
Slots need to be invoked within the render function and or the <template> box to ensure they keep their reactivity.
A full explanation can be found in this post: https://zelig880.com/how-to-fix-slot-invoked-outside-of-the-render-function-in-vue-3
The transition element of vue only works with display:none but not visibility:hidden, is there any way to make it work with visibility? I want to get the clientWidth of the element before it shows up, with display:none I can't get that value.
By the way I'm using vue3.
Here is the reproduction demo:
https://codesandbox.io/s/competent-hermann-b1s5q
I'm going to assume, for the sake of argument, that you genuinely do need to use visibility for hiding and that other potential solutions (such as opacity) won't work in your real use case, possibly because they don't prevent user interactions with the element.
However, the assertion in the question is slightly misleading. It isn't really a difference between display and visibility. The real difference here is that the display case is using v-show, which includes special handling for transitions.
The current source code for v-show can be seen here:
https://github.com/vuejs/vue-next/blob/d7beea015bdb208d89a2352a5d43cc1913f87337/packages/runtime-dom/src/directives/vShow.ts
A similar approach can be used to construct a directive that uses visibility. Below is an example. It is based on the code for v-show but I've cut it back to just the code required for this particular use case:
const visible = {
updated(el, { value, oldValue }, { transition }) {
if (!value === !oldValue) {
return
}
if (value) {
transition.beforeEnter(el)
el.style.visibility = ''
transition.enter(el)
} else {
transition.leave(el, () => {
el.style.visibility = 'hidden'
})
}
}
}
Vue.createApp({
data() {
return {
show: true
};
},
methods: {
toggle() {
this.show = !this.show;
}
},
directives: {
visible
}
}).mount('#app')
#app {
text-align: center;
}
.tooltip-enter-active {
transition: transform 0.4s ease-out, opacity 0.3s ease-out;
}
.tooltip-leave-active {
transition: transform 0.35s ease-in, opacity 0.28s ease-out;
}
.tooltip-enter-from {
transition: none;
}
.tooltip-enter-from,
.tooltip-leave-to {
transform: translateY(-30px) scale(0.96);
opacity: 0;
}
<script src="https://unpkg.com/vue#3.0.2/dist/vue.global.prod.js"></script>
<div id="app">
<transition name="tooltip">
<div v-visible="show">
Using visibility
</div>
</transition>
<button #click="toggle">toggle message</button>
</div>
I did also have to make a small CSS change to give the enter transition a kick:
.tooltip-enter-from {
transition: none;
}
You'd probably be better off without <transition> in this case:
const app = Vue.createApp({
data() {
return {
show: true,
};
},
methods: {
toggle() {
const tooltip = this.$refs.tooltip;
this.show = !this.show;
tooltip.classList.toggle("tooltip-show");
},
},
mounted() {
console.log('Tooltip-width: ', this.$refs.tooltip.clientWidth);
},
});
app.mount('#app')
#app {
font-family: Avenir, Helvetica, Arial, sans-serif;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
text-align: center;
color: #2c3e50;
margin-top: 60px;
}
.tooltip {
opacity: 0;
transform: translateY(-30px) scale(0.96);
transition: transform 0.35s, opacity 0.25s;
}
.tooltip-show {
opacity: 1;
transform: translateY(0) scale(1);
}
<script src="https://unpkg.com/vue#3.0.2/dist/vue.global.js"></script>
<div id="app">
<div class="tooltip" ref="tooltip">This will work!</div>
<button #click="toggle">toggle tooltip</button>
</div>
I have a question about Vue.
I want to add a class to a specific item:
<p v-on:click="display = !display">Rediger joke</p>
Display is False before and it change it to true.
And it works. But my problem is, that this onclick is inside an v-for loop, and i only want to put "display" on one "update-site" and not all of them. Can i do this or do I have to try a different setup?
Thanks a lot
I have this idea that might help you. The idea is you extend post object with for example visible property and when you click event triggered you change this property and add .display class. Please check this jsfiddle
template
<div id="app">
<article v-for="post in filteredPosts" :key="post.id">
{{post.name}}
<button #click="display(post)">show</button>
<div class="post-content" :class="{display: post.visible}">this is the part I want to display onclick</div>
<hr />
</article>
</div>
css
.post-content {
display: none;
}
.post-content.display {
display: block;
}
code
new Vue({
el: '#app',
data() {
return {
posts: []
};
},
created() {
//when you load posts. add visible property.
setTimeout(() => {
//posts from server
var postsFromServer = [{
id: 1,
name: 'Post One'
},
{
id: 2,
name: 'Post Two'
}
];
//add visible proprty.
this.posts = postsFromServer.map(post => {
return {
...post,
visible: false
};
});
}, 1000);
},
computed: {
filteredPosts() {
//do your filters
return this.posts;
}
},
methods: {
display(post) {
this.$set(post, 'visible', !post.visible);
}
}
});
I have an article, and i get the data from Firebase.
<article v-for="post in filteredPosts" :key="post.id">
{{post.name}}
<p v-on:click="display = !display"></p>
<div>this is the part I want to display onclick</div
</article>
updateInputs has display:none, but onclick I want it to be display as block:
.updateInputs.display {
display: block;
position: absolute;
top:0;
left:0;
bottom: 0;
background-color: white;
box-shadow: 4px 4px 10px black;
width: 100%;
height: auto;
overflow: hidden;
overflow-y: scroll;
padding-bottom: 10px;
}
I am using Vuetable and its awesome.
I am trying to create a top horizontal scroll, which I have done and its working fine. But I need to assign some events on the window.resize.
I created a component such as
<template>
<div class="top-scrollbar">
<div class="top-horizontal-scroll"></div>
</div>
</template>
<style scoped>
.top-scrollbar {
width: 100%;
height: 20px;
overflow-x: scroll;
overflow-y: hidden;
margin-left: 14px;
.top-horizontal-scroll {
height: 20px;
}
}
</style>
<script>
export default {
mounted() {
document.querySelector("div.top-scrollbar").addEventListener('scroll', this.handleScroll);
document.querySelector("div.vuetable-body-wrapper").addEventListener('scroll', this.tableScroll);
},
methods: {
handleScroll () {
document.querySelector("div.vuetable-body-wrapper").scrollLeft = document.querySelector("div.top-scrollbar").scrollLeft
},
tableScroll() {
document.querySelector("div.top-scrollbar").scrollLeft = document.querySelector("div.vuetable-body-wrapper").scrollLeft
}
}
}
</script>
I am calling it above the table such as <v-horizontal-scroll />
I created a mixin as
Vue.mixin({
methods: {
setScrollBar: () => {
let tableWidth = document.querySelector("table.vuetable").offsetWidth;
let tableWrapper = document.querySelector("div.vuetable-body-wrapper").offsetWidth;
document.querySelector("div.top-horizontal-scroll").style.width = tableWidth + "px";
document.querySelector("div.top-scrollbar").style.width = tableWrapper + "px"
}
}
})
And I am calling it when the user component on which Vuetable is being created
beforeUpdate() {
document.addEventListener("resize", this.setScrollBar());
},
mounted() {
this.$nextTick(function() {
window.addEventListener('resize', this.setScrollBar);
this.setScrollBar()
});
},
I want to understand how this resizing event working.
If I change even a single thing in the above code. I am starting to have issues.
Either it doesn't set the width of scroll main div correctly or even this.setScrollBar don't work on resizing.
I am not clear what is the logic behind this and how it is working?
I do auto expanding textarea.
The principle is this: I create a hidden div in which I place the input text, then in the updated () method I define the height of the div and apply the value to the textarea.
But there is one problem - there is text twitching, because First, the text crawls up, and then when the field is expanded, it returns to its place. As if the updated () method works late. By the same principle, I made a text field in the ReactJS there was no such effect.
What can do with it?
How it works: https://jsbin.com/zakavehewa/1/edit?html,css,js,console,output
<template>
<div class="textarea_wrap">
<textarea class="text_input textarea" v-model="value" ref="textarea"></textarea>
<div v-if="autoRow" class="text_input textarea shadow" ref="shadow">{{ value }}!</div>
</div>
</template>
<script>
export default {
props: {
autoRow: {
type: Boolean,
default: false
},
default: String
},
data () {
return {
value: this.default,
}
},
mounted() {
this.updateHeight()
},
updated() {
this.updateHeight()
},
methods: {
updateHeight() {
if (this.autoRow && this.$refs.shadow) {
this.$refs.textarea.style.height = this.$refs.shadow.clientHeight + 5 + 'px'
}
}
}
}
</script>
<style lang="scss" scoped>
.textarea_wrap {
position: relative;
}
.textarea {
line-height: 1.5;
min-height: 31px;
width: 100%;
font-family: inherit;
}
.shadow {
position: absolute;
left: -9999px;
pointer-events: none;
white-space: pre-wrap;
word-wrap: break-word;
resize: none;
}
</style>
Checkout https://github.com/wrabit/vue-textarea-autogrow-directive, it caters for rendering in hidden divs plus copying and pasting text.