关于appear的用法和enter的用法相似，它只是在第一次渲染的时候才会起作用。看完整的代码：
别忘了引用vue.js
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>初始渲染的过渡</title> <script src="https://www.jb51.net/article/vue.js"></script> </head> <style> .custom-appear-active{ color: #2fe26d; background: #b6b6b6; transition: all 1s ease; } .custom-appear{ font-size: 40px; color: #e069e2; background: #7798e2; } .custom-appear-to{ color: #e29138; background: #1c8942; } </style> <body> <div> <transition appear appear-class="custom-appear" appear-to-class="custom-appear-to" appear-active-class="custom-appear-active" > <p>appear</p> </transition> </div> <script> new Vue({ el: "#app" }) </script> </body> </html>
但是这里有一些问题：关于appear-class、 appear-to-class、 appear-active-class的相同属性那个起作用的问题。
四种情况：（与他们在style中的排列顺序有关系）
1、appear-class、 appear-to-class、 appear-active-class或者 appear-to-class、appear-class、 appear-active-class的排列顺序，此时只有appear-active-class的属性起作用。
2、appear-active-class、appear-class、 appear-to-class
此时appear-active-class的不起作用，由appear-class过渡到appear-to-class属性。
3、appear-class、appear-active-class、 appear-to-class
此时appear-class属性不起作用，由appear-active-class过渡到 appear-to-class属性。
4、 appear-to-class、 appear-active-class、appear-class
此时appear-to-class不起作用，由appear-class过渡到 appear-active-class属性。
enter也有相似的问题
总结
以上所述是小编给大家介绍的vue中appear的用法，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持！
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