vue-render-if

The vue-render-if component makes checking against data in your template, easy. This component helps clean up your Vue template when checking for multiple "falsey" values of different types.

Before

<template>
  <div v-if="value1 !== '' && value1 !== undefined && value1 !== null && value2 !== undefined && value2 !== null && value3 !== undefined && value3 !== null">
    <p>I should only render if every value is not undefined, null, or an empty string.</p>
  </div>
</template>

<script>
export default {
  data() {
    return {
      value1: 'Vue.js',
      value2: true,
      value3: 2018
    }
  }
}
</script>

After

<template>
  <render-if :defined="[value1, value, value3]">
    <p>I should only render if every value is not undefined, null, or an empty string.</p>
  </render-if>
</template>

<script>
import RenderIf from 'vue-render-if';

export default {
  components: {
    RenderIf,
  },
  data() {
    return {
      value1: 'Vue.js',
      value2: true,
      value3: 2018
    }
  }
}
</script>

By default, vue-render-if will render a div and will check if the values passed in the defined props array is either undefined, null, or an empty string ''. You can however, define your own invalid values.

Note: You can also pass in a single value if you are checking against one data or state property.

<template>
  <render-if :defined="value1">
    <p>I should only render if every value is not undefined, null, or an empty string.</p>
  </render-if>
</template>

Options

vue-render-if accepts three props, one of which is required (defined). The other two props are tag and not-valid.

Prop Name	Required	Default Value	Accepts	Purpose
defined	yes	N/A	Array (all types) or a single value	List all of the data items that should have a value of some kind for the slot to render.
tag	no	'div'	String	Defines the HTML tag render-if should render as.
not-valid	no	N/A	Array (all types) or a single value	Defines all of the property values that should be considered invalid.

<template>
  <render-if :defined="value1" tag="section" :not-valid="['foo, bar', undefined, null, '']">
    <p>I should only render if every value is not undefined, null, or an empty string.</p>
  </render-if>
</template>

This instance will...

• Render if value1 is not 'foo', 'bar', undefined, `null, or empty.
• Render a section tag.

Note: If you defined values for the not-valid prop, you will need to add undefined, null, and '' if you still want those to be falsy.

Usage

$ yarn add vue-render-if
# or
npm install --save vue-render-if

Add it Globally

main.ts

import RenderIf from 'vue-render-if';

Vue.component('render-if', RenderIf);

Using it in a Vue Component

<script>
import RenderIf from 'vue-render-if';

export default {
  components: {
    RenderIf
  }
}
</script>

Contributing

1. Fork it!
2. Create your feature branch: git checkout -b my-new-feature
3. Commit your changes: git commit -am 'Add some feature'
4. Push to the branch: git push origin my-new-feature
5. Submit a pull request!

Author

vue-render-if © Dave Berning, Released under the MIT License.

daveberning.io - GitHub - Twitter

Special thanks to Cory Kleiser, Lance Deters, and Craig Mullin.