HTML tag inside javascript eval() function

Question

Why in the first case, html em tags are printed normally whereas in the second test, they disappear.


var text = "text";
eval("var text = text.replace(/(.*)(ex)(.*)/gi,'$1<em>$2</em>$3');");
console.log(text)   //text -> t<em>ex</em>t

but

var textx = text.replace("/(.*)(ex)(.*)/gi",'$1<em>$2</em>$3');
console.log(textx) //textx -> text

Thanks

Note that the `console.log` in your second code tries to print out a different variable, instead of `textx`. — poke, Mar 12 '11 at 15:48

Gergely Fehérvári · Answer 1 · 2011-03-12T15:50:36.930

2

var text = "text";
var textx = text.replace(/(.*)(ex)(.*)/gi,'$1<em>$2</em>$3'); 
console.log(textx) //textx -> text

the problems was that you used a string in the regular expression. "/(.*)(ex)(.*)/gi" -> /(.*)(ex)(.*)/gi

and you had a spelling mistake in the console.log(testx) -> console.log(textx)

edited Mar 12 '11 at 15:50

answered Mar 12 '11 at 15:45

score 2 · Accepted Answer · answered Mar 12 '11 at 15:46

2

Because the first uses a regex to match text and the second uses a string.

There is no "/(.*)(ex)(.*)/gi" inside "text". There is /(.*)(ex)(.*)/gi.

answered Mar 12 '11 at 15:46

sidyll

2 Answers2