作者：php送 | 来源：互联网 | 2023-09-14 15:50
varmyTestValue3333dddddks__+;varreg^(?![0-9]+$)(?![a-zA-Z]+$)[A-Za-z_][A-Za-z_0-9]{0,}$con
var myTestValue="3333dddddks__+";
var reg=/^(?![0-9]+$)(?![a-zA-Z]+$)[A-Za-z_][A-Za-z_0-9]{0,}$/
console.log(reg.test(myTestValue));
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