js-lyrics

English | 中文

A JavaScript library for parsing LRC file, and select lyric to highlight.

Install

You can install via npm:

$ npm install lyrics.js

Or via Git reporsitory:

$ git clone https://github.com/frank-deng/js-lyrics.git

Usage

Parse the content of a .lrc file

Load .lrc file while initializing parser:

var lrc = new Lyrics(LRC_text);

Load .lrc file and replace previous loaded lyrics using the same parser object:

lrc.load(LRC_text);

Load .lrc file from URL:

var lrc = new Lyrics();
var xhr = new XMLHttpRequest();
xhr.addEventListener('readystatechange', function(e){
    if (4==xhr.readyState && 200==xhr.status){
        lrc.load(xhr.responseText);
    }
});
xhr.open("GET", "/path/to/lyrics.lrc", true);
xhr.send(null);

PS: To specify time offset for .lrc file, please add the following tag into your .lrc file:

[offset:t]

t is time offset in milliseconds, positive value to shift time up, negative value to shift time down.

Select lyric to highlight

Lyrics.select(time);

This method will return -1 when the time given is ahead the first lyric's time or time parameter is invalid.

Synchoronize lyrics with HTML5 audio element

var lrc = new Lyrics(LRC_text);
document.getElementById('audio_player').addEventListener('timeupdate', function(){
	//Unhighlight all the lyrics
	var lyric_selected = lyrics_container.querySelectorAll('p[selected]');
	for (var i = 0; i < lyric_selected.length; i++) {
		lyric_selected[i].removeAttribute('selected');
	}

	//Get the lyric to highlight
	var lyric_selected = lrc.select(this.currentTime);

	//Highlight the lyric
	if (lyric_selected != undefined && lyric_selected >= 0) {
		lyrics_container.querySelectorAll('p')[lyric_selected].setAttribute('selected', 'selected');
	}
});

Test Cases

You may launch text.html and test.min.html from test/ folder using brwoser to see the result of all the QUnit based test cases.

js-lyrics

English | 中文

一个用于解析LRC文件的JavaScript库，也用于选择需要高亮的歌词。

安装

使用**npm**安装：

$ npm install lyrics.js

从Git仓库安装：

$ git clone https://github.com/frank-deng/js-lyrics.git

用法

解析.lrc文件

初始化解析器的同时加载.lrc文件中的内容：

var lrc = new Lyrics(LRC_text);

加载.lrc文件中的内容，并替换之前加载的歌词：

lrc.load(LRC_text);

从URL加载.lrc文件：

var lrc = new Lyrics();
var xhr = new XMLHttpRequest();
xhr.addEventListener('readystatechange', function(e){
    if (4==xhr.readyState && 200==xhr.status){
        lrc.load(xhr.responseText);
    }
});
xhr.open("GET", "/path/to/lyrics.lrc", true);
xhr.send(null);

PS：如果需要为.lrc指定时间偏移量，请在.lrc文件中加上如下标签：

[offset:t]

t为时间偏移量，单位为毫秒，正数为延后，负数为提前。

选择需要高亮的歌词

Lyrics.select(time);

当时间早于第1条歌词的时间，或time参数非法时，返回-1。

使用HTML5 audio标签同步歌词

var lrc = new Lyrics(LRC_text);
document.getElementById('audio_player').addEventListener('timeupdate', function(){
	//所有歌词取消高亮
	var lyric_selected = lyrics_container.querySelectorAll('p[selected]');
	for (var i = 0; i < lyric_selected.length; i++) {
		lyric_selected[i].removeAttribute('selected');
	}

	//获取要高亮的歌词
	var lyric_selected = lrc.select(this.currentTime);

	//高亮歌词（如果有）
	if (lyric_selected != undefined && lyric_selected >= 0) {
		lyrics_container.querySelectorAll('p')[lyric_selected].setAttribute('selected', 'selected');
	}
});

测试用例

用浏览器打开test/目录下的test.html和test.min.html，可以查看QUnit测试用例的运行结果。