If you want to use built-in code, you can use toLocaleString() with minimumFractionDigits.
Browser compatibility for the extended options on toLocaleString() was limited when I first wrote this answer, but the current status looks good. If you're using Node.js, you will need to npm install the intl package.
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);Number formatting varies between cultures. Unless you're doing string comparison on the output,1 the polite thing to do is pick undefined and let the visitor's browser use the formatting they're most familiar with.2
// Demonstrate selected international locales
var locales = [
undefined, // Your own browser
'en-US', // United States
'de-DE', // Germany
'ru-RU', // Russia
'hi-IN', // India
'de-CH', // Switzerland
];
var n = 100000;
var opts = { minimumFractionDigits: 2 };
for (var i = 0; i < locales.length; i++) {
console.log(locales[i], n.toLocaleString(locales[i], opts));
}If you are from a culture with a different format from those above, please edit this post and add your locale code.
1 Which you shouldn't.
2 Obviously do not use this for currency with something like {style: 'currency', currency: 'JPY'} unless you have converted to the local exchange rate. You don't want your website to tell people the price is ¥300 when it's really $300. Sometimes real e-commerce sites make this mistake.
If you want to use built-in code, you can use toLocaleString() with minimumFractionDigits.
Browser compatibility for the extended options on toLocaleString() was limited when I first wrote this answer, but the current status looks good. If you're using Node.js, you will need to npm install the intl package.
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);Number formatting varies between cultures. Unless you're doing string comparison on the output,1 the polite thing to do is pick undefined and let the visitor's browser use the formatting they're most familiar with.2
// Demonstrate selected international locales
var locales = [
undefined, // Your own browser
'en-US', // United States
'de-DE', // Germany
'ru-RU', // Russia
'hi-IN', // India
'de-CH', // Switzerland
];
var n = 100000;
var opts = { minimumFractionDigits: 2 };
for (var i = 0; i < locales.length; i++) {
console.log(locales[i], n.toLocaleString(locales[i], opts));
}If you are from a culture with a different format from those above, please edit this post and add your locale code.
1 Which you shouldn't.
2 Obviously do not use this for currency with something like {style: 'currency', currency: 'JPY'} unless you have converted to the local exchange rate. You don't want your website to tell people the price is ¥300 when it's really $300. Sometimes real e-commerce sites make this mistake.
Use
num = num.toFixed(2);
Where 2 is the number of decimal places
Edit:
Here's the function to format number as you want
function formatNumber(number)
{
number = number.toFixed(2) + '';
x = number.split('.');
x1 = x[0];
x2 = x.length > 1 ? '.' + x[1] : '';
var rgx = /(\d+)(\d{3})/;
while (rgx.test(x1)) {
x1 = x1.replace(rgx, '
2');
}
return x1 + x2;
}
Sorce: www.mredkj.com
Videos
Generally
- Formatting numbers in JavaScript
- Formatting numbers for currency display and more.
In jQuery
- autoNumeric (a decent number formatter & input helper with locale support for jQuery 1.5+)
- jQuery Format (a clientSide implementation of Java's SimpleDateFormat and NumberFormat)
- jquery-numberformatter (number formatter with locale support)
Yes, there is definitely a way to format numbers properly in javascript, for example:
var val=2489.8237
val.toFixed(3) //returns 2489.824 (round up)
val.toFixed(2) //returns 2489.82
val.toFixed(7) //returns 2489.8237000 (padding)
With the use of variablename.toFixed .
And there is another function toPrecision() .
For more detail you also can visit
http://raovishal.blogspot.com/2012/01/number-format-in-javascript.html
Current JavaScript
From ES6 on you could use template strings:
let soMany = 10;
console.log(`This is ${soMany} times easier!`);
// "This is 10 times easier!"
See Kim's answer below for details.
Older answer
Try sprintf() for JavaScript.
If you really want to do a simple format method on your own, don’t do the replacements successively but do them simultaneously.
Because most of the other proposals that are mentioned fail when a replace string of previous replacement does also contain a format sequence like this:
"{0}{1}".format("{1}", "{0}")
Normally you would expect the output to be {1}{0} but the actual output is {1}{1}. So do a simultaneous replacement instead like in fearphage’s suggestion.
Building on the previously suggested solutions:
// First, checks if it isn't implemented yet.
if (!String.prototype.format) {
String.prototype.format = function() {
var args = arguments;
return this.replace(/{(\d+)}/g, function(match, number) {
return typeof args[number] != 'undefined'
? args[number]
: match
;
});
};
}
"{0} is dead, but {1} is alive! {0} {2}".format("ASP", "ASP.NET")
outputs
ASP is dead, but ASP.NET is alive! ASP {2}
If you prefer not to modify String's prototype:
if (!String.format) {
String.format = function(format) {
var args = Array.prototype.slice.call(arguments, 1);
return format.replace(/{(\d+)}/g, function(match, number) {
return typeof args[number] != 'undefined'
? args[number]
: match
;
});
};
}
Gives you the much more familiar:
String.format('{0} is dead, but {1} is alive! {0} {2}', 'ASP', 'ASP.NET');
with the same result:
ASP is dead, but ASP.NET is alive! ASP {2}