Posted By: Anonymous
I have a string with multiple commas, and the string replace method will only change the first one:
var mystring = "this,is,a,test" mystring.replace(",","newchar", -1)
The documentation indicates that the default replaces all, and that “-1” also indicates to replace all, but it is unsuccessful. Any thoughts?
The third parameter of
String.prototype.replace() function was never defined as a standard, so most browsers simply do not implement it.
The best way is to use regular expression with
g (global) flag.
var myStr = 'this,is,a,test'; var newStr = myStr.replace(/,/g, '-'); console.log( newStr ); // "this-is-a-test"
Still have issues?
It is important to note, that regular expressions use special characters that need to be escaped. As an example, if you need to escape a dot (
.) character, you should use
/./ literal, as in the regex syntax a dot matches any single character (except line terminators).
var myStr = 'this.is.a.test'; var newStr = myStr.replace(/./g, '-'); console.log( newStr ); // "this-is-a-test"
If you need to pass a variable as a replacement string, instead of using regex literal you may create
RegExp object and pass a string as the first argument of the constructor. The normal string escape rules (preceding special characters with
when included in a string) will be necessary.
var myStr = 'this.is.a.test'; var reStr = '\.'; var newStr = myStr.replace(new RegExp(reStr, 'g'), '-'); console.log( newStr ); // "this-is-a-test"