var iNum1 = parseInt("12345red"); //返回 12345 var iNum1 = parseInt("0xA"); //返回 10 var iNum1 = parseInt("56.9"); //返回 56 var iNum1 = parseInt("red"); //返回 NaN
var fNum1 = parseFloat("12345red"); //返回 12345 var fNum2 = parseFloat("0xA"); //返回 NaN var fNum3 = parseFloat("11.2"); //返回 11.2 var fNum4 = parseFloat("11.22.33"); //返回 11.22 var fNum5 = parseFloat("0102"); //返回 102 var fNum1 = parseFloat("red"); //返回 NaN
2017-04-07
parseFloat() ? ?解析一個字符串并返回一個浮點數(shù)。?
parseInt() ? ?解析一個字符串并返回一個整數(shù)。?
var iNum1 = parseInt("12345red"); //返回 12345
var iNum1 = parseInt("0xA"); //返回 10
var iNum1 = parseInt("56.9"); //返回 56
var iNum1 = parseInt("red"); //返回 NaN
var fNum1 = parseFloat("12345red"); //返回 12345
var fNum2 = parseFloat("0xA"); //返回 NaN
var fNum3 = parseFloat("11.2"); //返回 11.2
var fNum4 = parseFloat("11.22.33"); //返回 11.22
var fNum5 = parseFloat("0102"); //返回 102
var fNum1 = parseFloat("red"); //返回 NaN
2017-09-28
還有一點，只會提取字符串字母前面的數(shù)字，例如：alert(parseInt("10px123"));只返回10