I am trying to replace all the special characters even space but not numbers with - but if there are multiple special characters like [/// then it should only replace -

I have added my expected output in snippet

const string= "![astronaut-lost-in-space-rk](//images.ctfassets.net/c8qz6f7npv42/fJd9r4N1eriItv5XNp0uv/4b46d52459ea20684c653a1c200b5aa1/astronaut-lost-in-space-rk.jpg)";

console.log(string.replace(/[^a-zA-Z ]/g, "-"));

console.log("Expected Output")

console.log("-astronaut-lost-in-space-rk-images-ctfassets-net-c8qz6f7npv42-fjd9r4n1eriitv5xnp0uv-4b46d52459ea20684c653a1c200b5aa1-astronaut-lost-in-space-rk-jpg-")

In snippet you can see I have 4 special characters present at like this ])\\ and it getting replace by - by 4 times ---- I want to replace special characters but if it present more then 1 then it should replace every special character but show only one -

CodePudding user response：

You have to use plus-sign( ) plus toLowerCase() to get expected output

const string= "![astronaut-lost-in-space-rk](//images.ctfassets.net/c8qz6f7npv42/fJd9r4N1eriItv5XNp0uv/4b46d52459ea20684c653a1c200b5aa1/astronaut-lost-in-space-rk.jpg)";

console.log(string.replace(/[^a-zA-Z0-9] /g, '-').toLowerCase());

console.log("Expected Output")

console.log("-astronaut-lost-in-space-rk-images-ctfassets-net-c8qz6f7npv42-fjd9r4n1eriitv5xnp0uv-4b46d52459ea20684c653a1c200b5aa1-astronaut-lost-in-space-rk-jpg-")

I hope this is your expected output

CodePudding user response：

You can use the plus-sign ( ) to match 1 or more characters in a row:

string.replace(/[^a-zA-Z0-9] /g, '-')

This will give you the expected output

CodePudding user response：

You can use both \w to represent the characters you want to keep and the to match one or more consecutive ones and then replace that block with a "-".

const str = "![astronaut-lost-in-space-rk](//images.ctfassets.net/c8qz6f7npv42/fJd9r4N1eriItv5XNp0uv/4b46d52459ea20684c653a1c200b5aa1/astronaut-lost-in-space-rk.jpg)";

let result = str.replace(/[^\w] /g, "-");

console.log(result);

The \w is a shortcut that is equivalent to [A-Za-z0-9_]. If you don't want the underscore included, then you can skip the shortcut:

const str = "![astronaut-lost-in-space-rk](//images.ctfassets.net/c8qz6f7npv42/fJd9r4N1eriItv5XNp0uv/4b46d52459ea20684c653a1c200b5aa1/astronaut-lost-in-space-rk.jpg)";

let result = str.replace(/[^A-Za-z0-9] /g, "-");

console.log(result);