Function getLineNumberOfIndex

tools/js/utils/insert-at-line.js:15–26

(data, index)

// limitations under the License.

const getLineNumberOfIndex = (data, index) => {
  const lines = data.split('\n')
  let line = 0
  let i = 0

  while (i < index) {
    i += lines[line].length + 1
    line++
  }

  return line
}

const insertAtLineAtIndex = (oldContents, index, content) => {
  const line = getLineNumberOfIndex(oldContents, index)