find-line-column/findLineColumn.js

Given string and position, return line and column of position

function findLineColumn (content, index) {
  var lines = content.split('\n');
  var line = content.substr(0, index).split('\n').length;

  var startOfLineIndex = (function () {
    var x = lines.slice(0);
    x.splice(line - 1);
    return x.join('\n').length + (x.length > 0);
  }());

  var col = index - startOfLineIndex;

  return {
    line: line,
    col: col
  };
};

module.exports = findLineColumn;