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onhange

Description​

Fires when changes are made and applied via the user interface

The event is triggered when a user updates a rule.

Usage​

onchange?: (ev: {
  value: {
    rules?: ({
      field: string | number,
      type?: "number" | "text" | "date" | "tuple",
      predicate?: "month" | "year",
      filter?: string,
      includes?: any[],
      value?: any
    } | {
      rules?: any[]; // nested rules
      glue?: "and" | "or",
    })[];
    glue?: "and" | "or",
  };
}) => void;

Parameters​

The callback of the event takes the value object with the following parameters:

  • glue - (required) the logic for combining filtering rules:
    • "and" – returns records that satisfy all rules
    • "or" – returns records that satisfy at least one rule
  • rules - (required) an array of filtering rules. It can be an individual rule or a group of rules. Each rule object has the following parameters:
    • field - (required) the id of a field. It should be the same as the corresponding field id of the fields property
    • type - (optional) filter type: "text" (default) | "number"
    • predicate - (optional) Date part extractor ("month" or "year") for date fields
    • filter - (optional) the filter operator available for this type
    • includes – (optional) an array of values to include (strings, numbers, or dates)
    • value – (optional) the value to filter by

Example​

In the example below we track changes made to the FilterBar and log the current filter configuration into console:

<script>
  import { FilterBar } from "@svar-ui/svelte-filter";

  const fields = [
    "first_name",
    { id:"age", type:"number"},
    { id: "country", type:"text", options:["USA", "Germany"]},
  ];

  function handleChange(ev) {
    console.log(ev.value);
  }
</script>

<FilterBar
  {fields}
  onchange={handleChange}
/>

Related articles: FilterBar Guide