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Format in JavaScript Range Slider control

20 Oct 2021 / 3 minutes to read

The format feature used to customize the units of Slider values to desired format. The formatted values will also be applied to the ARIA attributes of the slider. There are two ways of achieving formatting in slider.

  • Use the format API of slider which utilizes our Internationalization to format values.
  • Customize using the events namely renderingTicks and tooltipChange.
Source
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app.ts
index.html
index.css
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import { Slider } from '@syncfusion/ej2-inputs';

// Initialize Slider control
 let sliderObj: Slider = new Slider({
min: 0, max: 100, step: 1, value: 30,
// Applying currency formatting for tooltip with two decimal specifiers
tooltip: { isVisible: true, format: 'C2' },
// Applying currency formatting for ticks with two decimal specifiers
ticks: { placement: 'After', format: 'C2', largeStep: 20, smallStep: 10, showSmallTicks: true }
});
// Render initialized Slider
sliderObj.appendTo('#slider');
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<!DOCTYPE html>
<html lang="en">

<head>
    <title>Essential JS 2 Slider</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 Slider Component" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div class='wrap'>
            <div id="slider">
            </div>
        </div>
    </div>
</body>

</html>
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#container {
  visibility: hidden;
}

#loader {
  color: #008cff;
  font-family: 'Helvetica Neue','calibiri';
  font-size: 14px;
  height: 40px;
  left: 45%;
  position: absolute;
  top: 45%;
  width: 30%;
}

.wrap {
  box-sizing: border-box;
  height: 260px;
  margin: 0 auto;
  padding: 30px 10px;
  width: 460px;
}

Using format API

In this method, we have different predefined formatting styles like Numeric (N), Percentage (P), Currency (C) and # specifiers. In this below example we have formatted the ticks and tooltip values into percentage.

Source
Preview
app.ts
index.html
index.css
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import { Slider } from '@syncfusion/ej2-inputs';

// Initialize Slider control
 let percentObj: Slider = new Slider({
min: 0, max: 1, value: .3, step: .01,
// Assigning ticks values to percentage formatting
ticks: { placement: 'After', largeStep: .2, smallStep: .1, showSmallTicks: true, format: 'P0' },
// Assigning tooltip values to percentage formatting
tooltip: { placement: 'Before', isVisible: true, showOn: 'Always', format: 'P0' },
});
// Render initialized Slider
percentObj.appendTo('#slider');
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<!DOCTYPE html>
<html lang="en">

<head>
    <title>Essential JS 2 Slider</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 Slider Component" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div class='wrap'>
            <div id="slider">
            </div>
        </div>
    </div>
</body>

</html>
Copied to clipboard
#container {
  visibility: hidden;
}

#loader {
  color: #008cff;
  font-family: 'Helvetica Neue','calibiri';
  font-size: 14px;
  height: 40px;
  left: 45%;
  position: absolute;
  top: 45%;
  width: 30%;
}

.wrap {
  box-sizing: border-box;
  height: 260px;
  margin: 0 auto;
  padding: 30px 10px;
  width: 460px;
}

Using Events

In this method, we will be retrieving the values from the slider events then process them to desired formatted the values. In this sample we have customized the ticks values into weekdays as one formatting and tooltip values into day of the week as another formatting.

Source
Preview
app.ts
index.html
index.css
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import { Slider, SliderTickEventArgs, SliderTooltipEventArgs } from '@syncfusion/ej2-inputs';

// Initialize Slider control
 let eventObj: Slider = new Slider({
    // Minimum value
    min: 0,
    // Maximum value
    max: 6,
    // Slider current value
    value: 2,
    // Assigning ticks data
    ticks: {
        placement: 'After',
        largeStep: 1
    },
    renderingTicks: function (args: SliderTickEventArgs) {
            // Weekdays Array
            let daysArr: string [] = ['Sunday','Monday','Tuesday','Wednesday','Thrusday','Friday','Saturday'];
            // Customizing each ticks text into weeksdays
            args.text = daysArr[parseFloat(args.value as any)];
    },
    tooltipChange: function (args: SliderTooltipEventArgs) {
            // Customizing tooltip to display the Day (in numeric) of the week
            args.text =  'Day ' + (Number(args.value) + 1).toString();
    },
    // Assigning tooltip data
    tooltip: {
        placement: 'Before',
        isVisible: true
    }
});
// Render initialized Slider
eventObj.appendTo('#slider');
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<!DOCTYPE html>
<html lang="en">

<head>
    <title>Essential JS 2 Slider</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 Slider Component" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div class='wrap'>
            <div id="slider">
            </div>
        </div>
    </div>
</body>

</html>
Copied to clipboard
#container {
  visibility: hidden;
}

#loader {
  color: #008cff;
  font-family: 'Helvetica Neue','calibiri';
  font-size: 14px;
  height: 40px;
  left: 45%;
  position: absolute;
  top: 45%;
  width: 30%;
}

.wrap {
  box-sizing: border-box;
  height: 260px;
  margin: 0 auto;
  padding: 30px 10px;
  width: 460px;
}