JavaScript判断前缀、后缀是否是空格的方法
本文实例讲述了JavaScript判断前缀、后缀是否是空格的方法。分享给大家供大家参考。具体如下:
// Js 判断后缀
String.prototype.endsWith = function(suffix) {
return this.indexOf(suffix,this.length - suffix.length)!==-1;
};
// Js 判断前缀
if (typeof String.prototype.startsWith != 'function') {
// see below for better implementation!
String.prototype.startsWith = function (str){
return this.indexOf(str) == 0;
};
}
// Js 判空(含全部是空格)
String.prototype.IsNullEmptyOrSpace = function()
{
if (this== null) return true;
return this.replace(/s/g, '').length == 0;
};希望本文所述对大家的javascript程序设计有所帮助。
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