javascript - RegExp 中的无效正则表达式错误

Question

我正在使用 RegExp 来验证美国电话号码。对于 ReEmailFormat6 我收到以下错误:

但其他表达式运行良好。我不确定为什么我会出现这个问题。请在下面找到我的代码:

    var reEmailFormat2 = new RegExp("(.)\1{7,}"); //match if phone number has same number repeated 8 or more times
var reEmailFormat3 = new RegExp("^0{1}[\d]{9}$"); //match if phone number has leading 0 with 9 digits after the 0
var reEmailFormat4 = new RegExp("1{1}[\d]{9}$"); //match if phone number has leading 1 with 9 digits after the 1
var reEmailFormat5 = new RegExp("/^[+]?(1\-|1\s|1|\d{3}\-|\d{3}\s|)?((\(\d{3}\))|\d{3})(\-|\s)?(\d{3})(\-|\s)?(\d{4})$/g");
var reEmailFormat6 = new RegExp("^(?:\+?1[-. ]?)?\(?([0-9]{3})\)?[-. ]?([0-9]{3})[-. ]?([0-9]{4})$");
debugger;

if (controlToValidate[0].value == "" || controlToValidate[0].value == controlToValidate.attr("placeholder")) {
    args.IsValid = false;
    controlToValidate.addClass("site-validation-field");
}
else if (controlToValidate[0].value == "") {
    args.IsValid = false;
    controlToValidate.addClass("site-validation-field");
}
else if ((reEmailFormat6.test(controlToValidate[0].value))) {
    debugger;
    args.IsValid = false;
    controlToValidate.addClass("site-validation-field");
}

Answer 1

使用正则表达式文字语法重写所有正则表达式:

var reEmailFormat2 = /(.)\1{7,}/; //match if phone number has same number repeated 8 or more times
var reEmailFormat3 = /^0{1}[\d]{9}$/; //match if phone number has leading 0 with 9 digits after the 0
var reEmailFormat4 = /1{1}[\d]{9}$/; //match if phone number has leading 1 with 9 digits after the 1
var reEmailFormat5 = /^[+]?(1\-|1\s|1|\d{3}\-|\d{3}\s|)?((\(\d{3}\))|\d{3})(\-|\s)?(\d{3})(\-|\s)?(\d{4})$/g;
var reEmailFormat6 = /^(?:\+?1[-. ]?)?\(?([0-9]{3})\)?[-. ]?([0-9]{3})[-. ]?([0-9]{4})$/;

当您将正则表达式形成为字符串以传递给RegExp()构造函数时，您必须考虑到JavaScript中的字符串语法也使用反斜杠字符作为元字符。因此，如果您不在源字符串中加倍反斜杠字符，则将其解析为字符串的过程将删除它们。