An example of using regular expressions to verify input content in a js input box

js input box input verification

/*用户名称格式判断——用户名只能为下划线、数字、字母或中文长度不超过10个字符*/

function checkUserName(str) {
var reg = /^[_0-9a-zA-Z\u4e00-\u9fa5]{1,10}$/;
return reg.test(str);
}

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