I have a button that runs the function startProcess which will generate a random number. This random number will be passed as a prop to Child.vue that will be used in style.
I looked into some pages How to use props in style in vue. The solution was to use computed, but nothing seems to work. For a better understanding, please check the code.
P.S. This is a simplified code. Removed template, script, style.
App.vue
<button @click="startProcess">Start</button>
<Child v-if="toggleChild" :top="top" />
data() {
return {
toggleChild: false,
top: 0
}
},
methods: {
startProcess() {
this.toggleChild = !this.toggleChild;
this.top = Math.random();
};
}
Child.vue
<button @click="logTop">Log</button>
props: { top: Number },
computed: {
return {
cssProps() {
"--top": `${this.top}%`;
};
};
};
.foo {
top: var(--top);
};
try like following snippet:
Vue.component('Child', {
template: `
<div class="">
<button @click="logTop" class="foo" :style="cssProps">Log</button>
</div>
`,
props: { top: Number, col: String },
methods: {
logTop() {
console.log(this.top)
}
},
computed: {
cssProps() {
return {
'--top': `${this.top}%`,
'--col': this.col
}
}
}
})
new Vue({
el: '#demo',
data() {
return {
toggleChild: false,
top: 0,
col: ''
}
},
methods: {
startProcess() {
this.toggleChild = !this.toggleChild;
this.top = Math.random()*100;
this.col = 'red'
}
}
})
Vue.config.productionTip = false
Vue.config.devtools = false.foo {
position: absolute;
top: var(--top);
background-color: var(--col);
};<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="demo">
<button @click="startProcess">Start</button>
<Child v-if="toggleChild" :top="top" :col="col" />
</div>