How to Format Numbers in JavaScript with a Specific Number of Decimal Places?

Formatting Numbers in JavaScript

To format numbers in JavaScript, one simple method is to use the toLocaleString() method, which adds locale-specific formatting, including number separation by commas and decimal point formatting. However, by default, the method doesn't guarantee a specific number of decimal places.

To control the number of decimal places, you can use the minimumFractionDigits option. By setting this option, you can specify the minimum number of digits to display after the decimal point, even if the number has less.

Here's an example:

var value = (100000).toLocaleString(
  undefined, // leave undefined to use the visitor's browser 
             // locale or a string like 'en-US' to override it.
  { minimumFractionDigits: 2 }
);
console.log(value);

This code will output the value 100,000.00, which has two decimal places as specified in the minimumFractionDigits option.

This method works well for basic formatting needs and is compatible with most modern browsers. Note that if you're using Node.js, you may need to install the intl package for full support.

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