以下方法傳值存在兩個問題:
1.不能去掉外面包裹的標籤
2.如果要傳值的太多,這種方法很搓很難閱讀
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script src="./vue.js"></script>
<!-- <script src="http://cdn.staticfile.org/vue/2.6.10/vue.common.dev.js"></script> -->
</head>
<body>
<div id="root">
<child content="<p>My name is Tom Cat</p>"></child>
</div>
<script type="text/javascript">
Vue.component("child", {
props: ["content"],
template: `<div>
<p>hello</p>
<br/>//把html標籤轉義顯示出來了:<br/><br/>
{{content}}<br/>
<br/>//正常渲染了html標籤(也顯示了外面包裹的div):
<div v-html='this.content'></div>
//而模版佔位符template也不能去掉外面包裹的標籤,而且整個都不渲染了:<br/>
<template v-html='this.content'></template>
<br/>
</div>`
});
var vm = new Vue({
el: "#root"
})
</script>
</body>
</html>
那用啥方法?用插槽啊!
插槽的使用細節:
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script src="./vue.js"></script>
<!-- <script src="http://cdn.staticfile.org/vue/2.6.10/vue.common.dev.js"></script> -->
</head>
<body>
<div id="root">
<child>
//這是插槽咯:
<h1>world</h1>
</child>
//注意:content是保留關鍵字,不能用作組件,so 用my-content(用myContent這樣的駝峯命名會報錯):
<my-content1>
<div class="header">header</div>
<div class="footer">footer</div>
</my-content1>
<br>//具名插槽:
<my-content2>
<div class="header" slot="header">header</div>
<div class="footer" slot="footer">footer</div>
</my-content2>
</div>
<script type="text/javascript">
Vue.component("child", {
//props: ["content"],
template: `<div>
<p>hello</p>
<slot>默認內容,當父組件不傳遞插槽內容的時候顯示</slot>
</div>`
});
Vue.component("my-content1", {
//props: ["content"],
template: `<div>
<slot></slot>
<div class='content'>hello</div>
<slot></slot>
</div>`
});
Vue.component("my-content2", {
//props: ["content"],
template: `<div>
<slot name="header">不給該插槽傳值,則顯示我</slot>
<div class='content'>hello</div>
<slot name="footer"></slot>
</div>`
});
var vm = new Vue({
el: "#root"
})
</script>
</body>
</html>