stripMargin.js

stripMargin.js

const stripMargin = (string, marginPrefix = '|') => {
  const lines = string.replace(/^\n|\n+$/g, '').split('\n');
  let result = '';

  lines.forEach((val, i) => {
    const indexOfMarginPrefix = val.indexOf(marginPrefix);

    if(indexOfMarginPrefix !== -1) {
      result += val.slice(indexOfMarginPrefix + 1) + '\n';
    }
  });
  
  return result;
};

usage.js

console.log(stripMargin(`
  |Tell me and I forget. 
  |Teach me and I remember. 
  |Involve me and I learn.
  |(Benjamin Franklin)
`));

console.log(stripMargin(`
  >Tell me and I forget. 
  >Teach me and I remember. 
  >Involve me and I learn.
  >(Benjamin Franklin)
`, '>'));