Category: Vue Answers

Sometimes, we want to fix conflict between templates of Twig and Vue.js.

In this article, we’ll look at how to fix conflict between templates of Twig and Vue.js.

How to fix conflict between templates of Twig and Vue.js?

To fix conflict between templates of Twig and Vue.js, we can change the delimiters when we’re creating the Vue instance.

For instance, we write

new Vue({ delimiters: ['${', '}'] })

to set the template variable delimiters to be different from the default double curly braces in Vue 2.

In Vue 3, we write

Vue.createApp({ delimiters: ['${', '}'] })

to set the template variable delimiters to be different from the default double curly braces with Vue.createApp.

Conclusion

To fix conflict between templates of Twig and Vue.js, we can change the delimiters when we’re creating the Vue instance.

Sometimes, we want to remount a component in Vue.js.

In this article, we’ll look at how to remount a component in Vue.js.

How to remount a component in Vue.js?

To remount a component in Vue.js, we should change the key prop of the component.

For instance, we write

<template>
  <div id="app">
    <my-component :key="componentKey"></my-component>
    <button @click="componentKey = !componentKey">reload</button>
  </div>
</template>

to set the key prop of my-component to componentKey.

And then we add a button to toggle the componentKey between true and false.

As a result, my-component will remount when we change the value of componentKey by clicking the button.

Conclusion

To remount a component in Vue.js, we should change the key prop of the component.

Sometimes, we want to limit iteration of elements in v-for with Vue.js.

In this article, we’ll look at how to limit iteration of elements in v-for with Vue.js.

How to limit iteration of elements in v-for with Vue.js?

To limit iteration of elements in v-for with Vue.js, we can use the JavaScript array slice method.

For instance, we write

<template>
  <div>
    <div v-if="showLess">
      <div v-for="value in array.slice(0, 5)" :key="value.id"></div>
    </div>
    <div v-else>
      <div v-for="value in array" :key="value.id"></div>
    </div>
    <button @click="showLess = false"></button>
  </div>
</template>

to call array.slice with indexes 0 and 5 to return an array with array elements from index 0 to 4.

And then we loop through the returned array with v-for.

How to limit iteration of elements in v-for with Vue.js?

To limit iteration of elements in v-for with Vue.js, we can use the JavaScript array slice method.

Sometimes, we want to toggle class on click with Vue.js.

In this article, we’ll look at how to toggle class on click with Vue.js.

How to toggle class on click with Vue.js?

To toggle class on click with Vue.js, we can set the class prop to an image with the class name as the property name and the condition to enable the class as the value.

For instance, we write

<template>
  <div
    :class="{ active: showMobileMenu }"
    @click="showMobileMenu = !showMobileMenu"
  >
    click me
  </div>
</template>

to set the active property to showMobileMenu to apply the active class if showMobileMenu is true.

And we set @click to showMobileMenu to its negation to toggle showMobileMenu.

As a result, when we click on the div, the active class would be toggled on and off.

Conclusion

To toggle class on click with Vue.js, we can set the class prop to an image with the class name as the property name and the condition to enable the class as the value.

Sometimes, we want to fix dynamic background image style not working in Vue.js.

In this article, we’ll look at how to fix dynamic background image style not working in Vue.js.

How to fix dynamic background image style not working in Vue.js?

To fix dynamic background image style not working in Vue.js, we can interpolate the background image URL into a string.

For instance, we write

<template>
  <div :style="{ 'background-image': `url(${image})` }"></div>
</template>

to set the style prop to an object with the background-image property set to url(${image}).

This sets the background-image CSS property to the URL of the background image if image is has the background image URL.

Conclusion

To fix dynamic background image style not working in Vue.js, we can interpolate the background image URL into a string.