variable in a string not working in javascript

Question

here is the code:

const textIn = fs.readFileSync('./txt/input.txt', 'utf-8');

const textOut = 'this is the addition: ${textIn}, \nCreated on ${Date.now()}';

fs.writeFileSync('./txt/output.txt', textOut);

The content of the input.txt file is "hello world". What should happen is the content of the output.txt file should read "this is the addition: hello world 1614606057967.

but it reads...

this is the addition: ${textIn}

Created on ${Date.now()}

Any ideas why?

Use backticks(`) not inverted comma – Harsh Chaturvedi Mar 01 '21 at 14:16 — Harsh Chaturvedi, Mar 01 '21 at 14:16

score 3 · Accepted Answer · answered Mar 01 '21 at 14:13

3

According to these Mozilla docs, you need to enclose your string in backticks, not single quotes.

So you want:

const textOut = `this is the addition: ${textIn}, \nCreated on ${Date.now()}`;

answered Mar 01 '21 at 14:13

Broots Waymb

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@sunday - glad I could help! If this answer solved your issue, you could 'accept' it by clicking the checkmark near the upvote and downvote buttons to let others know this solution works. – Broots Waymb Mar 02 '21 at 14:11

variable in a string not working in javascript

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