learn-vue/attribute-binding.html at master · goodhands/learn-vue · GitHub

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<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>Page Title</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" type="text/css" media="screen" href="main.css" />
    <script src="main.js"></script>

    <style>
        .is-loading{
            background-color: yellowgreen;
        }
    </style>
</head>
<body>
    <div id="root">

        <button :title="title" :class="{ 'is-loading': isLoading }" @click="toggleClass">
            Toggle me
        </button>
        <!-- OR -->
        <!-- <button v-bind:title="title">Hover over me</button> -->
    </div>

    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>

    <script>

        new Vue({

            el : '#root',

            data: {
               title: "Now the title is being set with JS",
               isLoading: false,
            },

            methods: {
                toggleClass(){
                    this.isLoading = true;
                }
            },

        })
    </script>
</body>
</html>