RunKit + 
Try any Node.js package right in your browser
This is a playground to test code. It runs a full Node.js environment and already has all of npm’s 1,000,000+ packages pre-installed, including line-navigator. Try it out:
var LineNavigator = require("line-navigator");
// This is just some Tonic file available for us to read
var navigator = new LineNavigator(__dirname + '/index.js');
// === Reading all lines ===
console.log("Reading all file by chunks:");
var indexToStartWith = 0;
navigator.readSomeLines(indexToStartWith, function linesReadHandler(err, index, lines, isEof, progress) {
console.log(` Chunk from line ${index} with ${lines.length} lines (${progress}%)`);
// Error happened
if (err) throw err;
// Reading lines
for (var i = 0; i < lines.length; i++) {
var lineIndex = index + i;
var line = lines[i];
// Do something with line
}
// progress is a position of the last read line as % from whole file length
// End of file
if (isEof) return;
// Reading next chunk, adding number of lines read to first line in current chunk
navigator.readSomeLines(index + lines.length, linesReadHandler);
});
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require()any package directly from npm- use arrow functions, classes, template strings, and most of ES6
awaitany promise instead of using callbacks (example)- create your own embedded node.js snippets
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