本文实例讲述了纯Javascript实现ping功能的方法。分享给大家供大家参考。具体实现方法如下：
function ping(ip) { var img = new Image(); var start = new Date().getTime(); var flag = false; var isCloseWifi = true; var hasFinish = false; img.onload = function() { if ( !hasFinish ) { flag = true; hasFinish = true; img.src = 'X://'; console.log('Ping ' + ip + ' success. '); } }; img.onerror = function() { if ( !hasFinish ) { if ( !isCloseWifi ) { flag = true; img.src = 'X://'; console.log('Ping ' + ip + ' success. '); } else { console.log('network is not working!'); } hasFinish = true; } }; setTimeout(function(){ isCloseWifi = false; console.log('network is working, start ping...'); },2); img.src = 'http://' + ip + '/' + start; var timer = setTimeout(function() { if ( !flag ) { hasFinish = true; img.src = 'X://'; flag = false ; console.log('Ping ' + ip + ' fail. '); } }, 1500);}ping('www.google.com:80');希望本文所述对大家的javascript程序设计有所帮助。