'change' 事件
当监视的目录或文件中的某些内容发生更改时触发。
在 fs.watch()
中查看更多详细信息。
根据操作系统支持,可能不提供 filename
参数。
如果提供了 filename
,如果 fs.watch()
在其 encoding
选项设置为 'buffer'
的情况下被调用,它将作为 <Buffer> 提供,否则 filename
将是 UTF-8 字符串。
import { watch } from 'fs';
// 通过 fs.watch() 监听器处理的示例
watch('./tmp', { encoding: 'buffer' }, (eventType, filename) => {
if (filename) {
console.log(filename);
// 打印: <Buffer ...>
}
});
eventType
<string> The type of change event that has occurredfilename
<string> | <Buffer> The filename that changed (if relevant/available)
Emitted when something changes in a watched directory or file.
See more details in fs.watch()
.
The filename
argument may not be provided depending on operating system
support. If filename
is provided, it will be provided as a <Buffer> if
fs.watch()
is called with its encoding
option set to 'buffer'
, otherwise
filename
will be a UTF-8 string.
import { watch } from 'fs';
// Example when handled through fs.watch() listener
watch('./tmp', { encoding: 'buffer' }, (eventType, filename) => {
if (filename) {
console.log(filename);
// Prints: <Buffer ...>
}
});