how to check for space and special characters in js code example

Example 1: remove special characters from string javascript

var str = "Hello^# World/";
str.replace(/[^a-zA-Z ]/g, ""); // "Hello World"

Example 2: how to check for special characters in javascript

var format = /[!@#$%^&*()_+\-=\[\]{};':"\\|,.<>\/?]+/;

if(format.test(string)){
  return true;
} else {
  return false;
}

Example 3: regex to check if string contains special characters javascript

var format = /[ `!@#$%^&*()_+\-=\[\]{};':"\\|,.<>\/?~]/;
//            ^                                       ^   
document.write(format.test("My@string-with(some%text)") + "<br/>");    //true
document.write(format.test("My string with spaces") + "<br/>");        //true 
document.write(format.test("MyStringContainingNoSpecialChars"));       //false