Using variables to replace 'placeholders' in Typescript with string interpolation

Question

Using variables to replace 'placeholders' in Typescript with string interpolation

Seeking a definitive answer on this matter, I pose the question:

In C#, an example of which would be as follows:

var text = "blah blah";
var strTest = String.Format("This is a {0}", text); //output: 'This is a blah blah'

How can I accomplish the same functionality in Typescript?

Utilization:

I am retrieving a URL from the environment.ts file, and this URL string will need to include placeholders. In my service layer, these placeholders must be replaced with the actual parameters to be transmitted.

angular typescript string-interpolation

Answer 1

Answer №1

Opt for using template strings over String.Format since they do not encounter indexing issues:

var text = "blah blah";
var strTest = `This is a ${text}`;
console.log(strTest);

What if I don't know the variable names to pass in?

You can create a function like this:

const gen = (text) => `This is a ${text}`;

Answer 2

Opt for using template strings over String.Format since they do not encounter indexing issues:

var text = "blah blah";
var strTest = `This is a ${text}`;
console.log(strTest);

What if I don't know the variable names to pass in?

You can create a function like this:

const gen = (text) => `This is a ${text}`;

Answer 3

Answer №2

To enhance your code organization, consider utilizing anonymous generator functions within the environments.ts file. This way, you can easily pass the required variables and incorporate template strings within these functions. Here's an example:

environments.ts

 export const myFunction = (input: string) => `My function returns ${input}`;

Another file:

import * as env from 'environments';

var text = "lorem ipsum";
var result = env.myFunction(text); //output: 'My function returns lorem ipsum'

Answer 4

To enhance your code organization, consider utilizing anonymous generator functions within the environments.ts file. This way, you can easily pass the required variables and incorporate template strings within these functions. Here's an example:

environments.ts

 export const myFunction = (input: string) => `My function returns ${input}`;

Another file:

import * as env from 'environments';

var text = "lorem ipsum";
var result = env.myFunction(text); //output: 'My function returns lorem ipsum'

Answer 5

Answer №3

If you're looking for a way to handle localized strings in your project, check out the npm package known as localized-strings. It offers a formatString method that allows for string interpolation similar to C#.

import LocalizedStrings, {LocalizedStringsMethods} from "localized-strings";

interface IStrings extends LocalizedStringsMethods{
}

const myLocalizedStrings: IStrings  = new LocalizedStrings({en: {}});
const output = myLocalizedStrings.formatString("This is a {0}", "example").toString();
console.log(output);

For more usage examples, you can visit this link.

Answer 6

If you're looking for a way to handle localized strings in your project, check out the npm package known as localized-strings. It offers a formatString method that allows for string interpolation similar to C#.

import LocalizedStrings, {LocalizedStringsMethods} from "localized-strings";

interface IStrings extends LocalizedStringsMethods{
}

const myLocalizedStrings: IStrings  = new LocalizedStrings({en: {}});
const output = myLocalizedStrings.formatString("This is a {0}", "example").toString();
console.log(output);

For more usage examples, you can visit this link.

Answer 7

Answer №4

Within your environment.ts file:

export const message = "This is a {0} and this is {1}.";

To use during runtime, at any point:

import * as customEnv from 'environments';

console.log(customEnv.message.replace('{0}', 'different text').replace('{1}', 'more unique text'));

Answer 8

Within your environment.ts file:

export const message = "This is a {0} and this is {1}.";

To use during runtime, at any point:

import * as customEnv from 'environments';

console.log(customEnv.message.replace('{0}', 'different text').replace('{1}', 'more unique text'));

Using variables to replace 'placeholders' in Typescript with string interpolation

Answer №1

Answer №2

Answer №3

Answer №4

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