vue

安装

npm 安装首先使用npm init新建一个node js项目
之后输入一些项目信息即可
根据文档安装vue
根据文档引入vue

常用指令

首先新建一个vue实例

和vue2 语法不同变成根据对象创建实例

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

    <script src="node_modules/vue/dist/vue.global.prod.js"></script>
</head>
<body>
    <div id="app">

    </div>
</body>

    <script>
        const Counter = {
            data() {
                return {
                }
            }
        }

        Vue.createApp(Counter).mount('#app');
    </script>

</html>

双向绑定和单项绑定

双向绑定指标签与数据相联系两者修改都会受到影响
单项绑定是执元素和数据绑定只有数据改变标签才会变标签改变数据不会变

v-html

将元素按html输出

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

    <script src="node_modules/vue/dist/vue.global.prod.js"></script>
</head>
<body>
    <div id="app">
        <span v-html="h">

        </span>
    </div>
</body>

    <script>
        const Counter = {
            data() {
                return {
                    h: '<h1>Hello world</h1>'   
                }
            }
        }

        Vue.createApp(Counter).mount('#app');
    </script>

</html>

v-text

按文本输出

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

    <script src="node_modules/vue/dist/vue.global.prod.js"></script>
</head>
<body>
    <div id="app">
        <span v-text="h">

        </span>
    </div>
</body>

    <script>
        const Counter = {
            data() {
                return {
                    h: '<h1>Hello world</h1>'   
                }
            }
        }

        Vue.createApp(Counter).mount('#app');
    </script>

</html>