Why I can't do this: ${someValue} in JavaScript / Typescript? [duplicate]

Question

I have an issue. JavaScript do not recognize code inside curly braces:

let a = 'John'; let s = 'Hello ${a}'; // output: 'Hello ${a}' instead of 'Hello John'

I have updated Typescript to latest version: npm install typescript@latest

Aren Hovsepyan · Accepted Answer · 2021-11-21 04:31:09Z

3

You write single quotes, which doesn't have interpolation capability.

Please try "backtick" char, which will solve your issue

`Hello ${a}`

You can read more about this here:

answered Nov 21, 2021 at 4:31

Aren Hovsepyan

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Comments

skara9 · Accepted Answer · 2021-11-21 04:28:48Z

2

Only works with backticks, not quotes.

Do `Hello ${a}` instead of 'Hello ${a}'

answered Nov 21, 2021 at 4:28

skara9

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Nasser1245 · Accepted Answer · 2022-01-16 14:27:10Z

1

whenever you want to use template string, you have to wrap up with the backtick (type alt + 96), the correct syntax is:

`string ${YOUR_VARIABLE} string`

Nasser1245

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answered Nov 21, 2021 at 4:37

vahid ghadiri

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