JavaScript Symbol.replace Property

The JavaScript Symbol.replace symbol determine the method that replaces the matched substring of a string.

Syntax

Parameters

String.

Return value

A new string.

Browser Support

Chrome	32
Safari	8
Firefox	29
Opera	19

Example 1

<script>
class Rep {
  constructor(value) {
    this.value = value;
  }
  [Symbol.replace](string) {
    return `${string}`;
  }
}
var r=new Rep("java");
document.writeln("Before: "+r.value);
document.writeln("After: "+"Javatpoint".replace(r.value));
</script>

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Output:

Before: java
After: Javatpoint

Example 2

<script>
class Rep {
  constructor(value) {
    this.value = value;
  }
  [Symbol.replace](string) {
    return `${string}`;
  }
}
var r=new Rep("javatpoint");
document.writeln("Before: "+r.value);
document.writeln("After: "+r.value.toUpperCase().replace(r.value));
</script>

Test it Now

Output: