I have the following problem:
I have too much logic in my inline style and would to place it inside a computed property. I know, that this is the way, that I should go, but do not know, how to achieve it.
Below I a simple example that I made for better understanding. In it, on button press, the child's component background-color is changing.
My code can be found here: Codesandbox
My parent component:
<template> <div id="app">
<MyChild :colorChange="active ? 'blue' : 'grey'" />
<p>Parent:</p>
<button @click="active = !active">Click Me!</button> </div> </template>
<script> import MyChild from "./components/MyChild";
export default { name: "App", components: {
MyChild, }, data() {
return {
active: false,
}; }, }; </script>
and my child component:
<template> <div class="hello">
<p>Hello from the child component</p>
<div class="myDiv" :style="{ background: colorChange }">
here is my color, that I change
</div> </div> </template>
<script> export default { name: "HelloWorld", props: {
colorChange: {
type: String,
default: "green",
}, }, }; </script>
<!-- Add "scoped" attribute to limit CSS to this component only --> <style scoped> .myDiv { color: white; padding: 1rem 0; } </style>
I also have a second question. Let's say, that I have more than one child component and also would like to change to colors on button click, but those colors differ. How can I achieve it without repeating myself (within the computed properties?)
Code example for my parent component:
<MyChild :colorChange="active ? 'blue' : 'grey'" />
<MyChild :colorChange="active ? 'grey' : 'blue'" />
<MyChild :colorChange="active ? 'blue' : 'red'" />
<MyChild :colorChange="active ? 'yellow' : 'blue'" />
Thanks in advance!
Maybe You can bind class and use different css classes:
Vue.component('MyChild',{
template: `
<div class="hello">
<p>Hello from the child component</p>
<div class="myDiv" :class="collorCurrent">
here is my color, that I change
</div>
</div>
`,
props: {
colorChange: {
type: String,
default: "green",
},
colorDef: {
type: String,
default: "green",
},
isActive: {
type: Boolean,
default: false,
},
},
computed: {
collorCurrent() {
return this.isActive ? this.colorChange : this.colorDef
}
}
})
new Vue({
el: "#demo",
data() {
return {
active: false,
}
},
}).myDiv { color: white; padding: 1rem; }
.blue {
background: blue;
font-size: 22px;
}
.red {
background: red;
font-variant: small-caps;
}
.yellow {
background: yellow;
color: black;
}
.grey {
background: grey;
text-decoration: underline;
}
.green {
background: green;
}<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="demo">
<p>Parent:</p>
<button @click="active = !active">Click Me!</button>
<my-child :is-active="active" :color-def="'grey'" :color-change="'blue'"></my-child>
<my-child :is-active="active" :color-def="'blue'" :color-change="'grey'"></my-child>
<my-child :is-active="active" :color-def="'red'" :color-change="'blue'"></my-child>
<my-child :is-active="active" :color-def="'blue'" :color-change="'yellow'"></my-child>
</div>