javascript 匹配所有字母和数字

Posted 2021-05-03

let longHand = /[A-Za-z0-9_]+/;
let shortHand = /\w+/;

let numbers = "42";
let varNames = "important_var";

longHand.test(numbers);   // returns true
shortHand.test(numbers);    // returns true
longHand.test(varNames);    // returns true
shortHand.test(varNames);   // returns true