This article describes the method of implementing ping functions in pure Javascript. Share it for your reference. The specific implementation method is as follows:
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');I hope this article will be helpful to everyone's JavaScript programming.