Question

9

string regex replace in node js

rated 0 times [ 14] [ 5] / answers: 1 / hits: 27173 / 7 Years ago, mon, may 15, 2017, 12:00:00

I'm having the below string in my node js.

var textToReplace = Your <b class =b_1>1</b> payment due is $4000.Your 

<b class =b_1>2</b> payment due is $3500. Your <b class =b_1>3</b> 

payment due is $5000.;

Here I want to replace <b class =b_1>*</b> with ''. The output is Your 1 payment due is $4000.Your 2 payment due is $3500. Your 3 payment due is $5000..

If this is a normal replace I wouldn't have had any problem, but here I think the best way to replace is by using Regex. This is where I'm confused. In java we have a stringVariableName.replaceAll() method. please let me know how can I do this.

Thanks

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isham

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answered 7 Years ago rebekahalysah · Accepted Answer

var newString = textToReplace.replace(/<b.*?>(.*?)</b>/g, '$1');

Explanation:

<b.*?> : matches the <b ...> opening tag (using the non-greedy quantifier to match as few as possible)

(.*?)  : matches the content of the <b></b> tag (should be grouped so it will be used as a replacement text), it uses the non-greedy quantifier too.

</b>  : matches the closing tag

g      : global modifier to match as many as possible

then we replace the whole match with the first captured group $1 which represents the content of the <b></b> tag.

Example:

var str = Your <b class =b_1>1</b> payment due is $4000.Your <b class =b_1>2</b> payment due is $3500. Your <b class =b_1>3</b> payment due is $5000.;



var newString = str.replace(/<b.*?>(.*?)</b>/g, $1);



console.log(newString);

Regex101 example.