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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