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                ### `<component></component>`標簽 `<component></component>`標簽是Vue框架自定義的標簽,它的用途就是可以動態綁定我們的組件,根據數據的不同更換不同的組件。 1.我們先在構造器外部定義三個不同的組件,分別是componentA,componentB和componentC. ~~~javascript var componentA={ template:`<div>I'm componentA</div>` } var componentB={ template:`<div>I'm componentB</div>` } var componentC={ template:`<div>I'm componentC</div>` } ~~~ 2.我們在構造器的components選項里加入這三個組件。 ~~~javascript components:{ "componentA":componentA, "componentB":componentB, "componentC":componentC, } ~~~ 3.我們在html里插入component標簽,并綁定who數據,根據who的值不同,調用不同的組件。 `<component v-bind:is="who"></component>` 這就是我們的組件標簽的基本用法。我們提高以下,給頁面加個按鈕,每點以下更換一個組件。 ~~~javascript <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <script type="text/javascript" src="../assets/js/vue.js"></script> <title>component-4</title> </head> <body> <h1>component-4</h1> <hr> <div id="app"> <component v-bind:is="who"></component> <button @click="changeComponent">changeComponent</button> </div> <script type="text/javascript"> var componentA={ template:`<div style="color:red;">I'm componentA</div>` } var componentB={ template:`<div style="color:green;">I'm componentB</div>` } var componentC={ template:`<div style="color:pink;">I'm componentC</div>` } var app=new Vue({ el:'#app', data:{ who:'componentA' }, components:{ "componentA":componentA, "componentB":componentB, "componentC":componentC, }, methods:{ changeComponent:function(){ if(this.who=='componentA'){ this.who='componentB'; }else if(this.who=='componentB'){ this.who='componentC'; }else{ this.who='componentA'; } } } }) </script> </body> </html> ~~~
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