1. v-if displays a single element
Note that else can only follow v-if or v-show
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>VueConditional Rendering</title>
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
<script src="../js/" type="text/javascript" charset="utf-8"></script>
</head>
<body>
<div class="test">
<div v-if="isDisplay"> <!--if...else... Single element-->
Show me1
</div>
<div v-else>
Show me2
</div>
</div>
<script type="text/javascript">
var myVue =new Vue({
el: ".test",
data: {
isDisplay: 1
}
})
</script>
</body>
</html>
The output result is: Show me 1
2. v-if displays multiple elements, and needs to be combined with <template>
Note that else can only follow v-if or v-show
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>VueConditional Rendering</title>
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
<script src="../js/" type="text/javascript" charset="utf-8"></script>
</head>
<body>
<div class="test">
<template v-if="isDisplay"> <!--if...else... usetemplateImplement multiple elements-->
<div>Show me1</div>
<div>Show me11</div>
<div>Show me12</div>
<div>Show me13</div>
</template>
<div v-else>
Show me2
</div>
</div>
<script type="text/javascript">
var myVue =new Vue({
el: ".test",
data: {
isDisplay: 1
}
})
</script>
</body>
</html>
Output result: Show me 1 Show me 11 Show me 12 Show me 13
3. v-show only supports single element display, and does not support multiple elements contained in <template>
Note that else can only follow v-if or v-show
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>VueConditional Rendering</title>
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
<script src="../js/" type="text/javascript" charset="utf-8"></script>
</head>
<body>
<div class="test">
<div v-show="isDisplay"> <!--if...else... Single element,Pay attention v-show Not supported <template> grammar-->
Show me1
</div>
<div v-else>
Show me2
</div>
</div>
<script type="text/javascript">
var myVue =new Vue({
el: ".test",
data: {
isDisplay: 1
}
})
</script>
</body>
</html>
4. The difference between v-if and v-show
(1) v-if is real rendering and uninstalling, but after the first rendering, the result will be cached.
(2) The v-show element is always compiled and retained, just simply switched based on CSS
(3) Summary: If you need to switch frequently, it is better to change v-show, but if the conditions are unlikely to change at runtime, it is better to change v-if
gitHub address:/lily1010/vue_learn/tree/master/lesson08
The above is all the content of this article. I hope it will be helpful to everyone's study and I hope everyone will support me more.