Toggle Visibility in Vue

To conditionally display content on your Vue applications, you can use the v-show directive. The v-show directive toggles the display css property of the element.

const app = Vue.createApp({
  data: () => ({ display: true }),
  methods: {
    toggleText() {
      this.display = !this.display;
    }
  },
  template: `
  <div>
    <h1 v-show="display">Hello!</h1>
    <button @click="toggleText()">Toggle</button>
  </div>
  `
}).mount('#content');

Using v-bind:class

The v-show directive works well for most cases. But if you want more fine-grained control over the CSS of how the element is hidden, like hiding the element using height: 0px; or opacity: 0;, you can use v-bind:class to conditionally add a class to your element.

.hide {
  display: none;
}

const example = Vue.createApp({
  data: () => ({ hide: true }),
  methods: {
    toggleText() {
      this.hide = !this.hide;
    }
  },
  template: `
  <div>
    <h1 v-bind:class="{hide:hide}">Hello!</h1>
    <button @click="toggleText()">Toggle</button>
  </div>
  `
}).mount('#example');

Using v-if

The v-if directive is similar to v-show. The major difference is that v-if unmounts the element from the DOM, while v-show simply hides it.

const example1 = Vue.createApp({
  data: () => ({ display: true }),
  methods: {
    toggleText() {
      this.display = !this.display;
    }
  },
  template: `
  <div>
    <h1 v-if="display">Hello!</h1>
    <button @click="toggleText()">Toggle</button>
  </div>
  `
}).mount('#example1');

Keep in mind that v-if will fire the Vue mounted hooks of any component underneath the v-if when the v-if expression changes from false to true.

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• Add Global Variables to Vue JS Templates
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