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var str = "Hello, world 123!";
var regex = /[^0-9]/g; // only count letters
console.log(str.replace(regex, "").length); // replaces numbers to empty char and counts length
// prints 10 to the console
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console.log(("str1,str2,str3,str4".match(/,/g) || []).length); //logs 3
console.log(("str1,str2,str3,str4".match(new RegExp("str", "g")) || []).length); //logs 4
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//when use length for string this will be return the count of charactor
//in string
$("#about_me_textarea").val().length
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const str = "Hello World";
const characterCount = str.length;
console.log(characterCount);