Vue之vuex实现简易计算器
2024-09-28 02:22:56
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>vuex——示例计算器</title>
<script src="https://unpkg.com/vue@2.3.3/dist/vue.js" type="text/javascript"></script>
<script src="https://unpkg.com/vue-router@2.5.3/dist/vue-router.js" type="text/javascript"></script>
<script src="https://unpkg.com/vuex@3.0.1/dist/vuex.js" type="text/javascript"></script>
</head>
<body> <style>
.result{
background: #ccc;
height:200px;
width: 80%;
text-align: right;
font-size: 48px;
position: relative;
}
.enter{
background: #ccc;
height: 50px;
width: 78%;
text-align: right;
font-size:32px;
border-bottom: 1px solid white;
padding-right: 2%;
}
.keys{
background: #eee;
width: 80%;
}
.item{
width: 25%;
height: 80px;
display: inline-block;
line-height: 80px;
border-bottom: 1px solid white;
text-align: center;
cursor: pointer;
}
.item:hover{
background: #000;
color: #ccc;
}
.item:first-child{
color: red;
}
.item:first-child:hover{
background: red;
color: #ccc;
}
.item:last-child{
background: red;
color: white;
}
.item:last-child:hover{
background: green;
color: red;
}
</style> <div id="app">
<div class="result">
<!--绑定计算属性result-->
<div style="position: absolute;bottom: 0;right: 2%;">
{{ result }}
</div>
</div>
<div class="enter">
<!--绑定计算属性enter-->
{{ enter === ""?0:enter }}
</div>
<div class="keys">
<div class="list">
<!--键盘区域-->
<keyboard v-for="item in keys" :value="item"></keyboard>
</div>
</div>
</div> <script>
// 创建仓库store
const store = new Vuex.Store({
state: {
result: "", //运算结果
enter: "" //输入的值
},
mutations: {
calculate(state,value){
if(value === "=") {
//按键的值为=， 进行结果计算
state.result = eval(state.enter);
state.enter += value;
} else if (value === "clear"){
//按键的值为clear，清空数据
state.result = state.enter = "";
} else {
//输入结果enter进行拼接
state.enter += value;
}
}
}
});
//自定义组件
Vue.component('keyboard',{
//接受的参数value，代表键盘的值
props: ['value'],
//模板
template: `<div class="item"
@click="getKeyboardValue"
:data-value="value">
{{value}}
</div>`,
methods: {
// 点击事件处理函数
getKeyboardValue(event){
//获取当前的按键的值
let value = event.target.dataset.value;
//通过commit提交mutation
this.$store.commit('calculate', value);
}
}
}); //创建Vue实例
const app = new Vue({
//挂载元素
el: "#app",
//ES6语法，相当于"store":store
store,
data: {
keys: [
'clear','+','-','*',
'7','8','9','/',
'4','5','6','0',
'1','2','3','=',
]
},
computed: {
result(){
//通过this.$store获取仓库的数据result
return this.$store.state.result;
},
enter(){
//通过this.$store获取仓库的数据result
return this.$store.state.enter;
}
}
});
</script> </body>
</html>
代码抄自：https://mp.weixin.qq.com/s?__biz=MzA3MDg1NzQyNA==&mid=2649654627&idx=1&sn=85bb9d0dfe34ab464f984f5f3042be2e&chksm=872c42dcb05bcbca37d495b24dfccb4a0179101e557be4c0119ab5a218c406a736e595ba5131&scene=21#wechat_redirect
微信号：webjiaocheng/Web前端教程
谢谢
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