
分享一个 Vue3 应用:教您实现点击按钮实现文字变色功能。废话不多说,直接上干货啦。
1.动态样式实现
1.1核心代码解释:
class="power-station-perspective-item-text":为这个
span元素添加了一个 CSS 类,以便对其样式进行定义。@click="clickItem(item.id)":这是一个 Vue 事件绑定。当用户点击这个
span元素时,会触发clickItem方法,并将item.id作为参数传递给该方法。这用于记录用户点击了哪个项目。:style="{ color: isChecked(item.id) ? '#cc7e17' : '' }":这是一个 Vue 动态绑定的内联样式。
isChecked(item.id)会检查当前项目是否被选中(即checkedItem.value是否等于item.id)。如果
isChecked(item.id)返回true,则color样式会被设置为'#cc7e17'(一种颜色值);否则,color样式为空字符串,表示不改变颜色。{{ item.title }}:这是一个 Vue 插值语法,用于显示每个项目的标题文本。
<span
class="power-station-perspective-item-text"
@click="clickItem(item.id)"
:style="{ color: isChecked(item.id) ? '#cc7e17' : '' }">
{{ item.title }}
</span>1.2源代码
<template>
<div class="power-station-perspective">
<div class="flow-chart-container-item">
<div class="power-station-perspective-title flow-chart-container-item-parent">
{{ title }}
</div>
<div v-for="item in buttonGroupsArr"
:key="item.id"
class="power-station-perspective-item flow-chart-container-item location"
>
<span
class="power-station-perspective-item-text"
@click="clickItem(item.id)"
:style="{ color: isChecked(item.id) ? '#cc7e17' : '' }">
{{ item.title }}
</span>
</div>
</div>
</div>
</template>
<script setup>
import {ref, onMounted} from "vue";
const title = ref("菜单项");
const buttonGroupsArr = ref([
{title: "按钮1", id: 0},
{title: "按钮2", id: 1},
{title: "按钮3", id: 2},
{title: "按钮4", id: 3},
{title: "按钮5", id: 4},
]);
const checkedItem = ref(0);
const isChecked = (param) => {
return checkedItem.value === param;
};
const clickItem = (param) => {
checkedItem.value = param;
};
onMounted(() => {
});
</script>
<style scoped>
.power-station-perspective{
width: 200px;
}
.flow-chart-container-item-parent {
width: 100%;
background: linear-gradient(90deg, rgba(0, 136, 234, 0.84) 0%,rgba(31, 38, 83, 0.85) 101.82%);
}
.flow-chart-container-item {
display: grid;
text-align: center;
padding: 3px 5px 3px 3px;
margin-bottom: 3px;
align-items: center;
}
.power-station-perspective-item {
background: rgba(0, 46, 79, 0.5);
}
.location {
cursor: pointer;
}
.power-station-perspective-item-text {
margin: 0 auto;
cursor: pointer;
}
.power-station-perspective-title {
margin-bottom: 3px;
}
</style>2.动态类名
2.1核心代码解释
说明:
:class绑定::class是 Vue 提供的一个特性,用于绑定动态类名。在这里,
:class绑定了一个数组,其中包含了两个元素。数组语法:
{ 'active-power-station-perspective-item-text': isChecked(item.id) }这个对象的键是
'active-power-station-perspective-item-text',值是一个布尔表达式isChecked(item.id)。如果
isChecked(item.id)返回true,则active-power-station-perspective-item-text类会被应用到span元素上;否则,不会应用。这意味着每个
span元素都会始终应用这个基础类,确保基本样式统一。数组的第一个元素是
'power-station-perspective-item-text':数组的第二个元素是一个对象:
:class="['power-station-perspective-item-text',
{ 'active-power-station-perspective-item-text': isChecked(item.id) }
]">2.2源代码
<template>
<div class="power-station-perspective">
<div class="flow-chart-container-item">
<div class="power-station-perspective-title flow-chart-container-item-parent">
{{ title }}
</div>
<div v-for="item in buttonGroupsArr"
:key="item.id"
class="power-station-perspective-item flow-chart-container-item location"
>
<span
class="power-station-perspective-item-text"
@click="clickItem(item.id)"
:class="[
'power-station-perspective-item-text',
{ 'active-power-station-perspective-item-text': isChecked(item.id) }
]">
{{ item.title }}
</span>
</div>
</div>
</div>
</template>
<script setup>
import {ref, onMounted} from "vue";
const title = ref("菜单项");
const buttonGroupsArr = ref([
{title: "按钮1", id: 0},
{title: "按钮2", id: 1},
{title: "按钮3", id: 2},
{title: "按钮4", id: 3},
{title: "按钮5", id: 4},
]);
const checkedItem = ref(0);
const isChecked = (param) => {
return checkedItem.value === param;
};
const clickItem = (param) => {
checkedItem.value = param;
};
onMounted(() => {
});
</script>
<style scoped>
.power-station-perspective{
width: 200px;
}
.flow-chart-container-item-parent {
width: 100%;
background: linear-gradient(90deg, rgba(0, 136, 234, 0.84) 0%,rgba(31, 38, 83, 0.85) 101.82%);
}
.flow-chart-container-item {
display: grid;
text-align: center;
padding: 3px 5px 3px 3px;
margin-bottom: 3px;
align-items: center;
}
.power-station-perspective-item {
background: rgba(0, 46, 79, 0.5);
}
.location {
cursor: pointer;
}
.power-station-perspective-item-text {
margin: 0 auto;
cursor: pointer;
}
.active-power-station-perspective-item-text{
color: #cc7e17;
}
.power-station-perspective-title {
margin-bottom: 3px;
}
</style>3.实现效果








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