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返回值:BooleanjQuery.isNumeric(value)
概述
确定它的参数是否是一个数字。
$.isNumeric() 方法检查它的参数是否代表一个数值。如果是这样，它返回 true。否则，它返回false。该参数可以是任何类型的
参数
valueV1.7
用于测试的值。
示例
描述:
Sample return values of $.isNumeric with various inputs.
jQuery 代码:
$.isNumeric("-10"); // true
$.isNumeric(16); // true
$.isNumeric(0xFF); // true
$.isNumeric("0xFF"); // true
$.isNumeric("8e5"); // true (exponential notation string)
$.isNumeric(3.1415); // true
$.isNumeric(+10); // true
$.isNumeric(0144); // true (octal integer literal)
$.isNumeric(""); // false
$.isNumeric({}); // false (empty object)
$.isNumeric(NaN); // false
$.isNumeric(null); // false
$.isNumeric(true); // false
$.isNumeric(Infinity); // false
$.isNumeric(undefined); // false