code: function alphanum (a, b) {
    function chunkify (t) {
      const tz = []
      let y = -1
      let n = 0
  
      for (let i = 0; i <= t.length; i++) {
        const char = t.charAt(i)
        const charCode = char.charCodeAt(0)
        const m = (charCode === 46 || (charCode >= 48 && charCode <= 57))
        if (m !== n) {
          tz[++y] = ''
          n = m
        }
        tz[y] += char
      }
  
      return tz
    }
  
    function stringfy (v) {
      if (typeof(v) === 'number') {
        v = `${v}`
      }
      if (!v) {
        v = ''
      }
      return v
    }
  
    const aa = chunkify(stringfy(a))
    const bb = chunkify(stringfy(b))
  
    for (let x = 0; aa[x] && bb[x]; x++) {
      if (aa[x] !== bb[x]) {
        const c = Number(aa[x])
        const d = Number(bb[x])
  
        if (c === aa[x] && d === bb[x]) {
          return c - d
        }
        return (aa[x] > bb[x]) ? 1 : -1
  
      }
    }
    return aa.length - bb.length
  }
docs: @author: Brian Huisman
  @webSite: http://www.greywyvern.com
  JS functions to allow natural sorting on bootstrap-table columns
  add data-sorter="alphanum" or data-sorter="numericOnly" to any th
  
  @update Dennis Hernández <http://djhvscf.github.io/Blog>
  @update Duane May