Sample conversions:
& -> `&`
> -> `>`
Any small library function that can handle this?
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3 Answers
I have on my utility belt this tiny function always:
function htmlDecode(input){
var e = document.createElement('div');
e.innerHTML = input;
return e.childNodes[0].nodeValue;
}
htmlDecode("&"); // "&"
htmlDecode(">"); // ">"
It will work for all HTML Entities.
Edit: Since you aren't in a DOM environment, I think you will have to do it by the "hard" way:
function htmlDecode (input) {
return input.replace(/&/g, "&")
.replace(/</g, "<")
.replace(/>/g, ">");
//...
}
If you don't like the chained replacements, you could build an object to store your entities, e.g.:
function htmlDecode (input) {
var entities= {
"&": "&",
"<": "<",
">": ">"
//....
};
for (var prop in entities) {
if (entities.hasOwnProperty(prop)) {
input = input.replace(new RegExp(prop, "g"), entities[prop]);
}
}
return input;
}
answered May 11, 2010 at 6:01
Christian C. Salvadó
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1 Comment
Pablo
please see my comment to bboe
A robust HTML entity encoder/decoder written in JavaScript.
he (for “HTML entities”) is a robust HTML entity encoder/decoder written in JavaScript. It supports all standardized named character references as per HTML, handles ambiguous ampersands and other edge cases just like a browser would, has an extensive test suite, and — contrary to many other JavaScript solutions — he handles astral Unicode symbols just fine. An online demo is available.
1 Comment
fredrivett
the last update to this was in 2018, so I would avoid this library if possible
Looks like this will do:
function html_entity_decode(s) {
var t=document.createElement('textarea');
t.innerHTML = s;
var v = t.value;
t.parentNode.removeChild(t);
return v;
}
2 Comments
Pablo
I have no document object and this should not rely on it, since I'm using JSM XUL.
bboe
You can use the code (phpjs.org/functions/htmlentities:425) which relies on a table lookup. You need to reverse the lookup to decode the entities.