Okay, how can I fix it?

Question

JavaScript

Пользователь 61aaa

Okay, how can I fix it?

0

13.08.2017

2 ответов

4 просмотра

Thomas

Promises: function checkConnection() { return new Promise(function (resolve, reject) { var img = document.createElement('img'); img.onload = resolve; img.onerror = reject; img.src = "https://still-forest-89345.herokuapp.com/java_developer.jpg"; }); } checkConnection().then(function () { alert("Connected"); }, function () { alert("Not connected"); });

0

13.08.2017

Thomas · Accepted Answer

Thomas

Callbacks: function checkConnection(cb) { var img = document.createElement('img'); img.onload = function () { return cb(true); }; img.onerror = function () { return cb(false); }; img.src = "https://still-forest-89345.herokuapp.com/java_developer.jpg"; } checkConnection(function (connected) { if (connected) { alert("Connected"); } else { alert("Not connected"); });

0

13.08.2017

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Okay, how can I fix it?

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