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Kirby 3.9.8

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    Helpers

    The Panel bundles a few functions that help you with common tasks.

    Available helpers

    How to access helpers

    The Panel exposes all shared helpers via this.$helper:

    // example in the Vue component of a custom field

panel.plugin("your/pad-display-field", {
  fields: {
    "pad-display": {
      // …
      computed: {
        paddedValue() {
          return this.$helper.pad(this.value);
        }
      }
      // …
    }
  }
});

    Reference

    this.$helper.clipboard

    Helpers to read from and write to the clipboard.

    Example

    this.$helper.clipboard.read(ClipboardEvent);
this.$helper.clipboard.read(value);

this.$helper.clipboard.write(value, ClipboardEvent);

    this.$helper.color

    Turns a string into a valid CSS color making use of the Panel's custom CSS properties.

    Example

    this.$helper.color("#444");
this.$helper.color("purple-400");
this.$helper.color("pattern");

    this.$helper.debounce

    Parameters

    Name Description
    fn Function to be debounced
    delay Delay in miliseconds

    Example

    debounce(function (query) {
  this.search(query);
}, 200);

    this.$helper.embed

    Helps to generate proper YouTube or Vimeo embed URLs.

    Parameters

    Name Description
    url URL to transform into valid embed URL
    doNotTrack If URL should try to enforce non-tracking (default: false)

    Example

    this.$helper.embed.video(youtubeOrVimeoUrl);
this.$helper.embed.youtube(youtubeUrl);
this.$helper.embed.vimeo(vimeoUrl);

    this.$helper.isComponent

    Checks if string refers to an existing Vue component.

    Example

    this.$helper.isComponent("my-mysterious-component");

    this.$helper.isUploadEvent

    Checks if a javascript event is really an upload event.

    Example

    YourVueComponent.vue
    <template>
  <div @drop="onDrop" />
</template>

<script>
export default {
  methods: {
    onDrop(event) {
      if (this.$helper.isUploadEvent(event) === true) {
        // …
      }
    }
  }
}

    this.$helper.keyboard

    Collection of helpers corresponding to keyboard events

    Example

    // returns meta key name depending on operating system, e.g. "cmd"
this.$helper.keyboard.metaKey();

    this.$helper.object

    Collection of helpers for JavaScript objects:

    clone

    Shorthand helper for cloning an object

    let array = ["homer, "simpson"];
let cloned = this.$helper.clone(array);

    isEmpty

    Checks if a value of any type is empty

    this.$helper.object.isEmpty(undefined) // true
this.$helper.object.isEmpty(null) // true
this.$helper.object.isEmpty("") // true
this.$helper.object.isEmpty([]) // true
this.$helper.object.isEmpty({}) // true

    merge

    Merges two objects

    this.$helper.object.merge(object1, object2);

    this.$helper.ratio

    Receive a padding percentage for a specified image ratio.

    Parameters

    Name Description
    ratio e.g. 1/2 (default: 3/2)

    Example

    return this.$helper.ratio("1/2");
// result: "50%"

    this.$helper.sort

    Natural sort algorithm with unicode support

    Example

    return this.$helper.sort(valueA, valueB);

    this.$helper.string

    Helper that offers a couple of methods:

    camelToKebab
    return this.$helper.string.camelToKebab("myFavoriteSong");
// result: "my-favorite-song"
    escapeHTML
    return this.$helper.string.escapeHTML("<script>");
// result: "&lt;script&gt;"
    hasEmoji
    return this.$helper.string.hasEmoji("hello");
// result: false

return this.$helper.string.hasEmoji("😎");
// result: true
    lcfirst
    return this.$helper.string.lcfirst("Hello");
// result: "hello"

    pad

    Adds 0 to the left of the value

    Name Description
    value Value to be padded
    length Length of the returned string (default: 2) 
    let money = 9;
return this.$helper.pad(money, 4);
// result: "0009"
    random

    Returns a random alpha-numeric string of specified length.

    return this.$helper.string.random(8);

    slug

    Transform a string to a valid slug according to a specified ruleset.

    Name Description
    string String to be transformed
    rules Array of transformation rulesets (objects themselves)
    allowed String of allowed characters 
    return this.$helper.slug("Was für ein Spaß", [
  {
    ü: "ue",
  },
  {
    ß: "sz",
  },
]);
// result: "was-fuer-ein-spasz"
    stripHTML
    return this.$helper.string.ucfirst("<p>Hello</p>");
// result: "Hello"
    template

    Replaces placeholers in a string with provided values

    return this.$helper.string.template("Hello, { name }!", { name: "Homer" });
// result: "Hello, Homer!"
    ucfirst
    return this.$helper.string.ucfirst("hello");
// result: "Hello"
    ucwords
    return this.$helper.string.ucwords("hello my dear");
// result: "Hello My Dear"

    this.$helper.upload

    Helper to upload a file.

    Parameters

    Name Description
    file File object
    params Options object (see defaults below) 
    // available params and their default
const defaults = {
  url: "/",
  field: "file",
  method: "POST",
  accept: "text",
  attributes: {},
  complete: function() {},
  error: function() {},
  success: function() {},
  progress: function() {}
};