Is there any ways of improving this code?
I want variables that doesn't start with numbers and doesn't include special characters, such as (!@#$%^) When I join these RegEx patterns it does not work properly when variable includes special characters
let text = prompt('add variable name');
let pattern = /^[^0-9]/g; // check if it starts with number
let condition = pattern.test(text);
if (condition == true) {
pattern = /[^a-zA-Z0-9$_]/; //check if it contains special characters (!@#$%^*) except ($ , _)
condition = pattern.test(text);
if (condition == false) {
console.log("Variable name is Valid");
}
else {
console.log('Variable name Is Not Valid'); //includes special character
}
}
else {
console.log('Variable name Is Not Valid'); //starts with number
}
Using condition is already a boolean, so you can use if (condition)
You might rewrite your code using a pattern that checks that the string does not start with a digit, and in the character class specify all allowed characters and match until the end of the string $
In this case you can shorten the ranges to word characters \w and the dollar sign $
let text = prompt('add variable name');
let pattern = /^(?!\d)[\w$]+$/;
let condition = pattern.test(text);
if (condition) {
console.log("Variable name is Valid");
} else {
console.log('Variable name Is Not Valid');
}