javascript check if string is number
// native returns true if the variable does NOT contain a valid number
isNaN(num)
// can be wrapped for making simple and readable
function isNumeric(num){
return !isNaN(num)
}
isNumeric(123) // true
isNumeric('123') // true
isNumeric('1e10000') // true (This translates to Infinity, which is a number)
isNumeric('foo') // false
isNumeric('10px') // falsecheck if a string contains digits js
function hasNumber(myString) {
return /\d/.test(myString);
}js string have number js
var hasNumber = /\d/;
hasNumber.test("ABC33SDF"); //true
hasNumber.test("ABCSDF"); //falsejavascript find a digit in str
var regex = /\d+/g;
var string = "Any string you want!";
var matches = string.match(regex); // creates array from matches
if (matches){
// There is a digit in the string.
} else {
// No Digits found in the string.
}Copyright © 2021 Codeinu
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