Replace string with emoji
This is an input field with a code representing emoji. Now I want to replace this code with the appropriate emoji.
The idea was to replace the value with unicode, but that doesn't work for me on inputs. Only when I copy the emoji into the code does the replacement work.
Example:
This code: [e-1f60e]
,
converted: 😎
,
must be: 😎
My question is, how can I convert the given code to emoji inside JavaScript?
$("#tauschen").click(function() {
$('#blub').val(function(index, value) {
return value.replace('[e-1f60e]', '😎'); // Doesn't work
});
});
$("#tauschen2").click(function() {
$('#blub2').val(function(index, value) {
return value.replace('[e-1f60e]', '😎'); // Works - but how to convert the given string to an emoji?!
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p>
Given are strings in an imout field like these, representing an emoji: <strong>[e-1f60e]</strong> </p>
<p>
Now I want to display them "live" as emojis, instead of only the code: 😎
</p>
<input id="blub" type="text" name="test" value="[e-1f60e]">
<input type="submit" value="Test 1" id="tauschen">
<br>
<input id="blub2" type="text" name="test" value="[e-1f60e]">
<input type="submit" value="Test 2" id="tauschen2">
JSFiddle: https://jsfiddle.net/r07qnuoz/1/
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1 answer
You need...
- ... find or extract a hexadecimal code point within a string
- ... convert this hex string to
number
- ... convert this code point number to a string via
String.fromCodePoint
function convertEmoji(str) {
return str.replace(/\[e-([0-9a-fA-F]+)\]/g, (match, hex) =>
String.fromCodePoint(Number.parseInt(hex, 16))
);
}
console.log(convertEmoji('[e-1f60e]')); // 😎
For IE compatibility, use String.fromCharCode
either as described here or by directly converting to 16-bit surrogate pairs according to the spec :
// Convert supplementary plane code point to two surrogate 16-bit code units:
function surrogate(cp) {
return [
((cp - 0x010000 & 0xffc00) >> 10) + 0xd800,
(cp - 0x010000 & 0x3ff) + 0xdc00
];
}
function convertEmoji(str) {
return str.replace(/\[e-([0-9a-fA-F]+)\]/g, function(match, hex) {
return String.fromCharCode.apply(null, surrogate(Number.parseInt(hex, 16)))
});
}
console.log(convertEmoji('[e-1f60e]')); // 😎
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