检查数字是否在范围内 [英] Check if number is in range

问题描述

我正在检查来自输入字段的号码是否在范围内

I am checking if my number coming from a input field is in range

function timeCheck(){

        var time = $.trim($('#enterTime').value());
            Number.prototype.between = function(min,max){
                return this > min && this < max;
            };
            if ((time).between(1,9)){
                    alert("test");
                }
            }

但不知何故它不起作用..警报是永远不会被触发

But somehow it does not work .. the alert is never triggered

感谢您的帮助和快速回答

Thanks for help and fast answer

推荐答案

扩展@ Daniel的回答是，还有另外两个错误：第一， $（'＃enterTime'）。value（）不是一个有效的jQuery函数，应该是 $（ '＃enterTime'）。VAL（）。其次，您需要将值转换为数字。否则，您将尝试访问字符串的属性之间的，该属性不存在。最终的代码是：

Extending @Daniel's answer, there are two other errors: first, $('#enterTime').value() is not a valid jQuery function, should be $('#enterTime').val(). Second, you need to convert your value to type Number. Otherwise, you will be trying to access the between property of a string, which doesn't exist. The final code would be:

function timeCheck(){
    var time = new Number($.trim($('#enterTime').val()));
    Number.prototype.between = function(min,max){
        return this > min && this < max;
    };
    if(time.between(1,9)){
        alert("test");
    }
}

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