Cannot replace single emoji from a string [duplicate]

Question

I have a string called completionBar which contains this:

let completionBar = `〚⬛⬛⬛⬛⬛〛`;

I'm trying to replace a single ⬛ with ⬜, so I tried:

completionBar.replace(/\U+2B1B/, 'U+2B1C');

but nothing happen, what I did wrong?

The problem is that the + sign has a special meaning for the regex engine, — ehab
– ehab, Commented Jul 11, 2020 at 9:54
Doing this using the unicode encodings would be: completionBar.replace(/\u2B1B/, String.fromCharCode("0x2B1C")) — Nick Parsons
– Nick Parsons, Commented Jul 11, 2020 at 10:13

norbitrial · Accepted Answer · 2020-07-11 09:53:56Z

0

You can use /⬛/g in .replace().

I would try as the following if you want to replace all:

let completionBar = `〚⬛⬛⬛⬛⬛〛`;

const result  = completionBar.replace(/⬛/g, '⬜');

console.log(result)

If you need only the first to replace:

let completionBar = `〚⬛⬛⬛⬛⬛〛`;

const result  = completionBar.replace('⬛', '⬜');

console.log(result)

I hope this helps!

edited Jul 11, 2020 at 9:53

answered Jul 11, 2020 at 9:52

norbitrial

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4 Comments

sfarzoso Over a year ago

oh really nice! how can I replace just one emojy?

norbitrial Over a year ago

@sfarzoso Just extended my answer with that.

sfarzoso Over a year ago

thanks! just last question: it is possible replace the last emojy of the string?

norbitrial Over a year ago

You can get the last index with lastIndexOf() then using the answer's solution from here: How do I replace a character at a particular index in JavaScript?.

Vu Vy · Accepted Answer · 2020-07-11 10:10:39Z

0

In my opinion, you can use escape and unescape function to show exactly the string code. It easy to debug and maintain the code.

let completionBar = `〚⬛⬛⬛⬛⬛〛`;

let escapeCompletionBar = escape(completionBar).replace(/u2B1B/g, 'u2B1C');

let result = unescape(escapeCompletionBar);

answered Jul 11, 2020 at 10:10

Vu Vy

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