nodeJS案例代码

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Demo01:
const fs = require("fs");
fs.writeFile('huanlishan.txt', 'hello', function(err) {
if (err) {
console.log("姓名写入失败")
}
console.log("姓名写入成功")
})

Demo02:
const fs = require("fs");
fs.readFile("./lrc.txt", function(err, data) {
if (err) {
return console.log("读取歌词文件失败")
}
data = data.toString();
var lines = data.split("n");

var reg = /[(d{2}):(d{2}).(d{2})]s*(.+)/;
for (var i = 0; i < lines.length; i++) {
(function(index) {
var line = lines[index];
var matches = reg.exec(line);
if (matches) {
var m = parseFloat(matches[1]); //获取分
var s = parseFloat(matches[2]); //获取秒
var ms = parseFloat(matches[3]); //获取毫秒
var content = matches[4] //获取定时器要输出的内容
var time = m * 60 * 1000 + s * 1000 + ms; //将分+秒+毫秒转化为毫秒
setTimeout(() => {
console.log(content)
}, time);

}
})(i)
}
})