<script type="text/javascript">
window.addEventListener('online', function() {
console.log('网络连接恢复!');
})
window.addEventListener('offline', function() {
console.log('网络连接中断!');
})
//或者
window.ononline = function() {
console.log('网络连接恢复!');
}
window.onoffline = function() {
console.log('网络连接中断!');
}
</script>
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