javascript - Regular validation of empty string

Question

I want to verify whether the string starts or ends with a space. Why is the result true regardless of orgName {code...}

某草草 · Answer

"*" means 0 or more times,
You should use "+" here to match at least once

世界只因有你 · Answer

Try:

const regx = /(^\s|\s$)/;

console.log(regx.test(''));      //false
console.log(regx.test('aaa'));   //false
console.log(regx.test('  '));    //true
console.log(regx.test(' aaa'));  //true
console.log(regx.test('aaa '));  //true
console.log(regx.test(' aaa ')); //true

高洛峰 · Answer

var orgName = " 112";
var reg = /^[s　]|[ ]$/gi;
if (reg.test(orgName)) {

alert("符合要求")

} else {

alert("输入内容不符合规范");

}

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