svelte-table

A relatively minimal table component. Allows sorting and filtering based on column values, and row selection/expanding.

Example

github pages IIFE example

Install

npm install -save svelte-table

Usage

The package includes exports for raw svelte, ES Module(.mjs) and CJS (.js) exports. Your bundler will likely know which one to pick by using import SvelteTable from "svelte-table"

<script>
  import SvelteTable from "svelte-table";
  const rows = [
    /** data (example below) */
  ];
  const columns = [
    /** columns config (example below) */
  ];
</script>

<SvelteTable columns="{columns}" rows="{rows}"></SvelteTable>

An iife version is also available in the /dist/iife folder. This allows for easy run-time use, such as a direct uncompiled dependency for a use outside of a svelte project.

<script src="iife/SvelteTable.js"></script>
<div id="my-table"></div>
<script>
  var rows = [
    /** data (example below) */
  ];
  var columns = [
    /** columns config (example below) */
  ];
  new SvelteTable({
    target: document.querySelector("#my-table"),
    props: { rows, columns },
  });
</script>

Sample Data and config

// define some sample data...
const rows = [
  { id: 1, first_name: "Marilyn", last_name: "Monroe", pet: "dog" },
  { id: 2, first_name: "Abraham", last_name: "Lincoln", pet: "dog" },
  { id: 3, first_name: "Mother", last_name: "Teresa", pet: "" },
  { id: 4, first_name: "John F.", last_name: "Kennedy", pet: "dog" },
  { id: 5, first_name: "Martin Luther", last_name: "King", pet: "dog" },
  { id: 6, first_name: "Nelson", last_name: "Mandela", pet: "cat" },
  { id: 7, first_name: "Winston", last_name: "Churchill", pet: "cat" },
  { id: 8, first_name: "George", last_name: "Soros", pet: "bird" },
  { id: 9, first_name: "Bill", last_name: "Gates", pet: "cat" },
  { id: 10, first_name: "Muhammad", last_name: "Ali", pet: "dog" },
  { id: 11, first_name: "Mahatma", last_name: "Gandhi", pet: "bird" },
  { id: 12, first_name: "Margaret", last_name: "Thatcher", pet: "cat" },
  { id: 13, first_name: "Christopher", last_name: "Columbus", pet: "dog" },
  { id: 14, first_name: "Charles", last_name: "Darwin", pet: "dog" },
  { id: 15, first_name: "Elvis", last_name: "Presley", pet: "dog" },
  { id: 16, first_name: "Albert", last_name: "Einstein", pet: "dog" },
  { id: 17, first_name: "Paul", last_name: "McCartney", pet: "cat" },
  { id: 18, first_name: "Queen", last_name: "Victoria", pet: "dog" },
  { id: 19, first_name: "Pope", last_name: "Francis", pet: "cat" },
  // etc...
];

// define column configs
const columns = [
  {
    key: "id",
    title: "ID",
    value: v => v.id,
    sortable: true,
    filterOptions: rows => {
      // generate groupings of 0-10, 10-20 etc...
      let nums = {};
      rows.forEach(row => {
        let num = Math.floor(row.id / 10);
        if (nums[num] === undefined)
          nums[num] = { name: `${num * 10} to ${(num + 1) * 10}`, value: num };
      });
      // fix order
      nums = Object.entries(nums)
        .sort()
        .reduce((o, [k, v]) => ((o[k] = v), o), {});
      return Object.values(nums);
    },
    filterValue: v => Math.floor(v.id / 10),
    headerClass: "text-left",
  },
  {
    key: "first_name",
    title: "FIRST_NAME",
    value: v => v.first_name,
    sortable: true,
    filterOptions: rows => {
      // use first letter of first_name to generate filter
      let letrs = {};
      rows.forEach(row => {
        let letr = row.first_name.charAt(0);
        if (letrs[letr] === undefined)
          letrs[letr] = {
            name: `${letr.toUpperCase()}`,
            value: letr.toLowerCase(),
          };
      });
      // fix order
      letrs = Object.entries(letrs)
        .sort()
        .reduce((o, [k, v]) => ((o[k] = v), o), {});
      return Object.values(letrs);
    },
    filterValue: v => v.first_name.charAt(0).toLowerCase(),
  },
  {
    key: "last_name",
    title: "LAST_NAME",
    value: v => v.last_name,
    sortable: true,
    filterOptions: rows => {
      // use first letter of last_name to generate filter
      let letrs = {};
      rows.forEach(row => {
        let letr = row.last_name.charAt(0);
        if (letrs[letr] === undefined)
          letrs[letr] = {
            name: `${letr.toUpperCase()}`,
            value: letr.toLowerCase(),
          };
      });
      // fix order
      letrs = Object.entries(letrs)
        .sort()
        .reduce((o, [k, v]) => ((o[k] = v), o), {});
      return Object.values(letrs);
    },
    filterValue: v => v.last_name.charAt(0).toLowerCase(),
  },
  {
    key: "pet",
    title: "Pet",
    value: v => v.pet,
    renderValue: v => v.pet.charAt(0).toUpperCase() + v.pet.substring(1), // capitalize
    sortable: true,
    filterOptions: ["bird", "cat", "dog"], // provide array
  },
];

Props

‡ field allows 2-way binding

Events

Events pass a CustomEvent object with the following params in the detail object

Expanding Rows

• Row expanding is tracked using the expanded property. (supports 2-way binding)
• The keys are defined using the rowKey property (previously expandRowKey which is getting deprecated). It is recommended to use a key that is unique to each row like a dedicated id or key field, to prevent conflict.
• The content for the field is passed through the expanded slot.
• The expanding can be managed manually or by using the built-in column using showExpandIcon property
• Expand events can be listened to using on:clickExpand which will include the row object in the event.detail object.
• expandSingle can be set to true to only allow a single column open at a time
• expandSingle does not inforce single row expansion when multiple keys are is passed to expanded
• Row expanded status is available through the $expanded property of the row, but is consdered an internal and may be removed

Example:

<div class="row">
  <SvelteTable
    columns="{cols}"
    rows="{data}"
    showExpandIcon="{true}"
    expandSingle="{true}"
    rowKey="id"
  >
    <svelte:fragment slot="expanded" let:row>{row.detail}</svelte:fragment>
  </SvelteTable>
</div>

Selecting Rows

• By default, selection functionality is disabled, enable through selectOnClick
• Row selection is tracked by selection property and supports 2-way binding
• Selection happens when user clicks on row
• Use classNameRowSelected to assign class to a selected row
• Selection is tracked using the key defined by the rowKey property
• The selection prop is an array because it supports both single and multiple selections
• Multiple vs. single selection is handled through selectSingle
• selectSingle does not enforce single row selection when multiple keys are is passed to selection
• Row selection status is available through the $selected property of the row, but is considered an internal and may be removed

Filtering order

Providing sortOrders specifies the column filtering orders. sortOrders = [1, -1, 0] indicates that the row will be sorted ascending (1), then descending (-1), then going back without any filter (0),

filterSelections

Allows getting and setting the search or filter value. The filterSelections will update as the filter and search selection changes. Inside the object keys (matching row keys) will be used to get/set the filter and search values. Setting key to undefined or deleting it will remove filter or search setting.

example: (will preset column with key first_name to a)

<script>
  const selection = { first_name: "A" };
</script>
<SvelteTable
  columns="{columns}"
  rows="{data}"
  bind:filterSelections="{selection}"
/>

Column array object values

searchValue

Option 1: searchValue(row, searchTerm):boolean

Define a function that accepts a row and the searchTerm, the comparison is defined within the function and the match is returned in the form of a boolean.

This is the recommended way of using the search (added in v0.5.3)

Option 2: searchValue(row):string

Define a function that accepts a row and returns a string. SveltTable does the comparison internally, but only supports case-insensitive compare using includes

This behaviour is set for deprecation and should not be used.

If you want to migrate the existing behaviour you can use this example:

searchValue: (v, s) =>
  v["some_key"].toString().toLowerCase().includes(s.toLowerCase()),

renderComponent

Defining a component can be done directly by passing the component as a value

[
  {
    key: "myColumn",
    //...
    renderComponent: myComponent,
  },
];

Or, if props need to be passed, an object with component and props can be passed.

[
  {
    key: "myColumn",
    //...
    renderComponent: {
      component: myComponent,
      props: {
        myProp: "someValue",
      },
    },
  },
];

Slots

Conditional row and cell class names

By passing a function to classNameRow the rows can have class assigned for the tr element based on the row value. The function is provided two arguments, the row value, and the row index.

// classNameRow function type definition
(row: Row, rowIndex?: number) => string | null;

This is an example of using the row index make a striped table, which may be needed when rows are expandable.

(row, rowIndex) => (rowIndex % 2 == 0 ? null : "row-odd");

Individual cells can also be formatted by passing a function to the class prop in the column object. The class function is provided three parameters. In addition to the row and rowIndex, it also provides the column index

// classs function type definition
(row: Row, rowIndex?: number, colIndex?: number) => string | null;

example for a checker-board pattern:

(row, rowIndex, colIndex) =>
  (rowIndex + colIndex) % 2 == 0 ? null : "cell-odd";

example using a value from the row object:

row => row.count > 10 && "cell-valid";