Error with replacing regular expressions in IE11 for the variable $0

Question

Error with replacing regular expressions in IE11 for the variable $0

Having both a string and a message:

str = "Test $0 $1 $2";
message = "Hi %2 Hello %2" ;

The goal is to replace all occurrences of %2 with str in the message using RegExp, like so:

message = message.replace(new RegExp("%2" , "g"), str);

While this works as expected in Chrome and Firefox:

message = "Hi Test $0 $1 $2 Hello $0 $1 $2"

In Internet Explorer 11, an issue arises where the value of the message is incorrect:

message = "Hi Test %2 $1 $2 Hello %2 $1 $2"

It seems that in IE11, the substitution is not replacing $0 (a substring of str) properly. Any suggestions on how to fix this would be greatly appreciated.

javascript regex internet-explorer-11

Answer 1

Answer №1

When working with replacement strings in JavaScript, it is important to note that the dollar sign $ has a special function. To use a dollar sign in your string, you must escape it by adding another dollar sign before it. For example, your variable str should look like this:

var str = 'Test $$0 $$1 $$2'

If you are curious about the specific purposes of the dollar sign in JavaScript, you can explore more information on the topic by visiting this documentation page on the Mozilla Development Network.

Snippet:

var str = "Test $$0 $$1 $$2",
    message = "Hi %2 Hello %2"

message = message.replace(/%2/g, str)

console.log(message)

Answer 2

When working with replacement strings in JavaScript, it is important to note that the dollar sign $ has a special function. To use a dollar sign in your string, you must escape it by adding another dollar sign before it. For example, your variable str should look like this:

var str = 'Test $$0 $$1 $$2'

If you are curious about the specific purposes of the dollar sign in JavaScript, you can explore more information on the topic by visiting this documentation page on the Mozilla Development Network.

Snippet:

var str = "Test $$0 $$1 $$2",
    message = "Hi %2 Hello %2"

message = message.replace(/%2/g, str)

console.log(message)

Answer 3

Answer №2

Give this a try for some assistance

var words = 'Experiment $0 $1 $2';
conversation = "Hi %2 Hey %2";
var rege = new RegExp("%2", "g");
if (words.indexOf("$") > 0) {
  var value = words[words.indexOf("$") + 1];
  if (value.trim() != "" && value.trim() != "$") {
    var regex = new RegExp(value, "g");
    words = words.replace(regex, "$$" + value);
  }
}
conversation = conversation.replace(new RegExp("%2", "g"), words);
alert(conversation);

Answer 4

Give this a try for some assistance

var words = 'Experiment $0 $1 $2';
conversation = "Hi %2 Hey %2";
var rege = new RegExp("%2", "g");
if (words.indexOf("$") > 0) {
  var value = words[words.indexOf("$") + 1];
  if (value.trim() != "" && value.trim() != "$") {
    var regex = new RegExp(value, "g");
    words = words.replace(regex, "$$" + value);
  }
}
conversation = conversation.replace(new RegExp("%2", "g"), words);
alert(conversation);

Error with replacing regular expressions in IE11 for the variable $0

Answer №1

Answer №2

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