The sliderNumFormat function formats scale numbers (above the sliders) and values (appear when you drag a slider). It allows scale and value formats to be the same or different. The function uses Intl.NumberFormat to format numbers in a variety of styles based on locale or locales. Some of the possibilities include:

• Thousands separators (e.g., 1,000)
• Decimals (e.g., 1,000.00)
• Currency (e.g., $1,000)
• Percents (e.g., 100%)
• Units (e.g., 16 l, 16l, or 16 liters)
• Scientific (e.g., 1.000E3)
• Compact (e.g., $1K)

Here is a simple example:

This function is available for a reasonable fee. Contact TomG on the Qualtrics Community to learn more.

Add the sliderNumFormat function to the survey header to make it available to any question in the survey. Go to Look & Feel → General → Header edit → and paste the provided sliderNumFormat function JS:

<script>/*Paste sliderNumFormat function JS here*/</script>

Alternatively, paste the sliderNumFormat function JS into a question's JS outside the existing Qualtrics functions to make it available to questions on the page.

Add JS to call the sliderNumFormat function to apply it to the Slider question as follows:

Qualtrics.SurveyEngine.addOnload(function() {
	sliderNumFormat(this);
});

To override the default options, specify the desired options in the second function argument as an object. For example:

Qualtrics.SurveyEngine.addOnload(function() {
	mfCsSliders(this,{format:{style:"currency",currency:"USD",maximumFractionDigits:0}});
});

• Slider question
• Type: Sliders
• Custom Start Position: Off
• Scale Points: 0 to 100 (or some other max)
• Show value: Off
• Mobile friendly: On

format is a numeric value that specifies what the constant sum must total to when mustTotalFlag is true.

Default: "en-US"

locale is a string or array that specifies the locale or locales to be used by Intl.NumberFormat.

Default: "en-US"

mustTotalFlag is a boolean that specifies if the constant sum must total to a specific value.

Default: true

prefix is text that is shown before numeric values.

Default: ""

suffix is text that is show after numeric values.

Default: "%"

widths is the width of the constant sum numbers in ems. An 'em' is the width of a wide character (i.e., M).

Default: 3

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