Vue Composition API - useToggle

by nolleto

HTML

<script src="https://unpkg.com/vue@next"></script>
<body>
  <div id="app">
    <my-component /> 
  </div>
</body>

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#app {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  transition: all 0.2s;
}

h2 {
  margin-bottom: 8px;
}

JavaScript

const { ref, createApp } = Vue

const app = createApp({});

const useToggle = (initialValue = false) => {
  const value = ref(initialValue);

  const toggle = () => {
    const newValue = !value.value;

    value.value = newValue;
  };

  const setAsTrue = () => {
    value.value = true;
  };

  const setAsFalse = () => {
    value.value = false;
  };

  return { value, toggle, setAsTrue, setAsFalse };
};

app.component('my-component', {
  setup() {
    const { value: isVisible, toggle: toggleVisibility } = useToggle()
    
    return { isVisible, toggleVisibility }
  },
  
  template: `
	<div>
	  <h2>useToggle</h2>

  	<button @click="toggleVisibility">Toggle visibility</button>
	  <div v-if="isVisible">
    	Some content
    </div>
	</div>
  `
})

app.mount("#app");