javascript - 验证 JavaScript

Question

我正在尝试验证其中 4 个地址。我尝试了多种方法，但它们似乎不起作用。如果我使用单个地址进行比较，它可以工作，但多个地址则不行。

function validateAddress() {
    var address = document.forms["ipForm"]["address"].value;
    var error = "";
    var ip1 = "192.168.0.0";
    var ip2 = "192.168.0.1";
    var ip3 = "192.168.0.2";
    var ip4 = "192.168.0.3";


    if (!address.match(ip1)) {
        error += "Please enter a valid address \n";
    }

    else if (!address.match(ip2)) {
        error += "Please enter a valid address \n";
    }

    else if (!address.match(ip3)) {
        error += "Please enter a valid address \n";
    }

    else if (!address.match(ip4)) {
        error += "Please enter a valid address \n";
    }
    return error;
}

Answer 1

如果您不针对正则表达式进行验证，则根本不需要 match。如果只有一组有效选项，则只需使用 Array.indexOf

对该组进行测试

var input = "xyz"// Some user input 
var validIps = ["192.168.0.0", "192.168.0.1", "192.168.0.2", "192.168.0.3"];

if (validIps.indexOf(input) == -1) { // if this is not in set indexOf returns -1
  // error
}