jsRegExp正则表达式常见用例

判断输入是否为数字、字母、下划线组成

function isValid(str) { return /^\w&＃43;$/.test(str); }
let str &＃61; "1234abd__"isValid(str ) // true


判断字符串是否全部为字母

val &＃61; "abc123"
var isletter &＃61; /^[a-zA-Z]&＃43;$/.test(val);


判断字符串是否全部为数字

val &＃61; "123456"
var isnum &＃61; /^\d&＃43;$/.test(val);


判断是否带有小数

function isDecimal(strValue ) { var objRegExp&＃61; /^\d&＃43;\.\d&＃43;$/;return objRegExp.test(strValue);
}


判断是否中文名称组成

function ischina(str) {var reg&＃61;/^[\u4E00-\u9FA5]{2,4}$/; /*定义验证表达式*/return reg.test(str); /*进行验证*/
}


判断手机号

checkUserPhone(phone) {if (!/^1[3456789]\d{9}$/.test(phone)) {return false;}return true;},//function isTelCode(str) {var reg&＃61; /^((0\d{2,3}-\d{7,8})|(1[3584]\d{9}))$/;return reg.test(str);
}


判断身份证

checkIdCard(code) {if (code.length &＃61;&＃61; 18) {code &＃61; code.split(&＃39;&＃39;);// ∑(ai×Wi)(mod 11)// 加权因子var factor &＃61; [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2];// 校验位var parity &＃61; [1, 0, &＃39;X&＃39;, 9, 8, 7, 6, 5, 4, 3, 2];var sum &＃61; 0;var ai &＃61; 0;var wi &＃61; 0;for (var i &＃61; 0; i <17; i&＃43;&＃43;) {ai &＃61; code[i];wi &＃61; factor[i];sum &＃43;&＃61; ai * wi;}if (parity[sum % 11] !&＃61; code[17]) {return false;} else {return true;}} else {return false;}},


判断验证码

checkSmsCode(code) {return (/^\d{6}$/.test(code));},//function isStudentNo(str) {var reg&＃61;/^[0-9]{6}$/; /*定义验证表达式*/return reg.test(str); /*进行验证*/
}


判断邮件地址是否合法

function IsEmail(str) {var reg&＃61;/^\w&＃43;&＃64;[a-zA-Z0-9]{2,10}(?:\.[a-z]{2,4}){1,3}$/;return reg.test(str);
}


判断是否是emoji表情

isEmoji(str) {return str.match(/\ud83c[\udf00-\udfff]|\ud83d[\udc00-\ude4f]|\ud83d[\ude80-\udeff]/g) !&＃61; null},


获取字符长度&＃xff0c;中文算2&＃xff0c;emoji表情算2&＃xff0c;英文算1

getStringLength(str) {if (!str) return 0;let reg &＃61; /^[\u3220-\uFA29]&＃43;$/,len &＃61; 0,test &＃61; &＃39;&＃39;,strLen &＃61; str.length;for (let i &＃61; 0; i

判断IOS | 安卓

&＃xff5b;isAndroid: /android|adr/.test(navigator.userAgent)isiOS&＃xff1a;!!u.match(/\(i[^;]&＃43;;( U;)? CPU.&＃43;Mac OS X/)isIOS: /iphone|ipod|ipad/i.test(navigator.userAgent) || !!navigator.userAgent.match(/\(i[^;]&＃43;;( U;)? CPU.&＃43;Mac OS X/);isQQ: !/micromessenger/i.test(navigator.userAgent) && /qq/i.test(navigator.userAgent), // 手QisWxApp: window.__wxjs_environment &＃61;&＃61;&＃61; &＃39;miniprogram&＃39; // 微信小程序
&＃xff5d;