Regular expression not able to read complete string, only working correct with single character.
var abc = "ab";
var patter = /^([a-z0-9A-Z])$/;
if (patter.test(abc)) {
console.log('yes');
} else {
console.log('no');
}
You must set a quantifier when you don't want just one character.
Add a *
to match zero or more character (or a +
if you want to be sure there's at least one character);
var patter = /^[a-z0-9A-Z]*$/;
Note that I removed the parentheses : they're useless with the test
method.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.