How can I replace a regex substring match in Javascript

Question

var str      asd-0 testing   var regex    asd-  d    w     str replace regex  1     That replaces the entire string str with 1  I want it to replace the matched substring instead of the whole string  Is this possible in Javascript

User · Answer

I would get the part before and after what you want to replace and put them either side.

Like:

var str   = 'asd-0.testing';
var regex = /(asd-)\d(\.\w+)/;

var matches = str.match(regex);

var result = matches[1] + "1" + matches[2];

// With ES6:
var result = `${matches[1]}1${matches[2]}`;

User · Answer

I think the simplest way to achieve your goal is this   var str      asd-0 testing   var regex     asd-   d     w     var anyNumber   1  var res   str replace regex    1  anyNumber  3

User · Answer

var str      asd-0 testing   var regex     asd-  d    w     str   str replace regex    11 2    console log str     Or if you re sure there won t be any other digits in the string   var str      asd-0 testing   var regex     d   str   str replace regex   1    console log str

User · Answer

using str replace regex   1     var str      asd-0 testing   var regex     asd-  d    w      if  str match regex         str   str replace regex    1     1      2        Edit  adaptation regarding the comment

[javascript] How can I replace a regex substring match in Javascript?

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