If the string contains white space alert should be unsuccessful and if string contain no white space alert should be successful
import React from "react";
export default function DropDown() {
let i=document.getElementById("input")?.value;
const submit=()=>{
var whiteSpaceExp = /^s+$/g;
if (whiteSpaceExp.test(i))
{
alert('unsuccess');
}
else
{
alert('success');
}
}
return (
<>
<form>
<input type="text" id="input" autoComplete="off" />
<button onClick={submit}> click </button>
</form>
</>
);
}
You can simply use the indexOf method on the input string:
function hasWhiteSpace(s) {
return s.indexOf(' ') >= 0;
}
Or you can use the test method, on a simple RegEx:
function hasWhiteSpace(s) {
return /\s/g.test(s);
}
This will also check for other white space characters like Tab.