String.Format like C# in typescript

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Is it possible to use similar function like String.Format of C# in TypeScript?

My idea is to make some string like:

url = "path/{0}/{1}/data.xml"

depending of the logical I set {0} and {1}. Obiouslly I can replace them but I think String.Format is a clear function.

Expanding on the comment that I made on the response from vivekkurien, declaring a function which, in turn, interpolates is probably the largest "bang for your buck" approach. I use this, frequently, for generating chunks of repetitive HTML with minor varying properties, for example.

The answer from vivekkurien, however, does not work. It returns a literal string, instead. Here is a modified sample, based on the original answer:

const pathFn = (param1, param2) => `path/${param1}/${param2}/data.xml`;

let param1 = "student";
let param2 = "contantdetails";
let resultPath = pathFn(param1, param2);


A runnable example of the above code can be found here: Function-Based Interpolation at TypeScript Playground

String.Format not work in TypeScript, You can declare it yourself quite easily: interface StringConstructor { format: (​formatString: string, replacement: any[]) => string; } String.format('','');. Equivalent of String.format in jQuery (20 answers) Closed 5 years ago . C# has the really powerful String.Format() for replacing elements like {0} with parameters.

I think you are looking for back quote: ``

var firstname = 'Fooo';
var lastname = 'Bar';

console.log(`Hi ${firstname} ${lastname}. Welcome.`);

typescript-string-operations, Simple lightweight string operation library for Typescript, works with Angular. String.Format():. var id = image.GetId(). String.Format("image_{0}.jpg", id) StringBuilder. Just like you know from C#,. var favoriteFruit: string = this.​fruitService. One thing that we C# developers like about the language is its Type Safety. A string is a string, and an int is an int; try to mix the two of them and bad things happen. This is NOT the case in the world of JavaScript.

const StringFormat = (str: string, ...args: string[]) =>
  str.replace(/{(\d+)}/g, (match, index) => args[index] || '')

let res = StringFormat("Hello {0}", "World!")
console.log(res) // Hello World!
res = StringFormat("Hello {0} {1}", "beautiful", "World!")
console.log(res) // Hello beautiful World!
res = StringFormat("Hello {0},{0}!", "beauty")
console.log(res) //Hello beauty,beauty!
res = StringFormat("Hello {0},{0}!", "beauty", "World!")
console.log(res) //Hello beauty,beauty!

Try in TypeScript Playgroud

Simple String.format() in javascript (Example), Thanks! I made a small improvement so that all instances are replaced rather than just the first. :) String.prototype.format = function () { var a  Strings can be formatted like C# String.Format: var str = format('{0}, {1}!', 'Hello', 'world'); console.log(str); // prints "Hello, world!" the format will place the correct variable in the correct spot, even if they appear out of order:

You need to make the path as a function which can accept 2 parameter. Then it will return as string if we call the function with required parameters.

const pathFn= (param1, param2) => "path/${param1}/${param2}/data.xml";
let param1 = "student";
let param2 = "contantdetails";
let resultPath = pathFn(param1,param2);

TypeScript - Interpolated Strings, Format() was by far my most used function for generating user readable error it awhile ago when I came across an article covering the new features of C# 6.0. I decided to look up the definition of interpolation since it sounded like jargon to  The fact that the open/closed paren — () — is an operator in JavaScript and not just compiler bird seed finally hit me the other week. That plus string interpolation in TypeScript led to this little postlet. TypeScript supports something called string interpolation. This is apparently called template literals in ECMA 6.

This worked for me. Tried with different scenarios.

format(text: string, ...args: string[]): string {
    return text.replace(/{(\d+)}/g, (match, num) => {
      return typeof args[num] !== 'undefined' ? args[num] : match;

sevensc/typescript-string-operations: Simple lightweight , Simple lightweight string operation library for Typescript. String.Format():. var id = image.GetId() String.Format("image_{0}.jpg", Just like you know from C#,. You can also check another String interpolation in C# tutorial that demonstrates how to use interpolated strings to produce formatted strings. Compilation of interpolated strings. If an interpolated string has the type string, it's typically transformed into a String.Format method call.

String.Format in JavaScript, A JavaScript function to replace string placeholders with values. Like every other website we use cookies. By using our site you C# and VB.NET have a nifty String.prototype.format = function (args) { var str = this; return  Template strings are a useful feature of modern programming languages ,among them TypeScript .Syntactically they are enclosed with two backticks (``),one for denoting the start of the string and the other one for denoting the end of the string .

TypeScript String, How to Import another TypeScript Files ? niku123. Check out this Author's contributed articles. If you like GeeksforGeeks and would like  TypeScript is a hideous language compared to C# and since TypeScript is compiled to Javascript anyway, then why didn't you simply let people write in C# syntax ? C# is easier to read and write, and well known by all the ASP.NET, WPF, Sil

Convert Date To String in TypeScript, In TypeScript, the toDateString() method converts the date of a Date object into a readable string, but it does not convert the time. Syntax. Date. When comparing C# vs TypeScript, the Slant community recommends C# for most people. In the question “What is the best programming language to learn first?” C# is ranked 14th while TypeScript is ranked 22nd. The most important reason people chose C# is: C# runs on top of the .NET framework,

  • String.format you can use an array and position 0 i the format and the next one are the values but all in an array of basic objects. Is it possible to do in Typescript?
  • Not natively, that I am aware of. That being said, check out the second response to this question, which sounds very close to what you are looking for, there:…
  • String.format you can use an array and position 0 i the format and the next one are the values but all in an array of basic objects.
  • You would want to use bat quotes for the string interpolation to kick in, as well as use the interpolation marker ($) for the replacement to happen. See:…