All files / src/utils get-by-class.js

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
 
 
 
 
 
 
 
 
 
 
 
 
 
 
18x
2220x
1859x
 
361x
 
 
 
18x
1x
1x
 
 
1x
 
 
 
18x
1x
1x
 
1x
1x
1x
1x
1x
1x
 
 
1x
1x
 
 
 
1x
 
 
18x
18x
2222x
2222x
2220x
2x
1x
 
1x
 
 
 
 
/**
 * A cross-browser implementation of getElementsByClass.
 * Heavily based on Dustin Diaz's function: http://dustindiaz.com/getelementsbyclass.
 *
 * Find all elements with class `className` inside `container`.
 * Use `single = true` to increase performance in older browsers
 * when only one element is needed.
 *
 * @param {String} className
 * @param {Element} container
 * @param {Boolean} single
 * @api public
 */
 
var getElementsByClassName = function (container, className, single) {
  if (single) {
    return container.getElementsByClassName(className)[0]
  } else {
    return container.getElementsByClassName(className)
  }
}
 
var querySelector = function (container, className, single) {
  className = '.' + className
  Iif (single) {
    return container.querySelector(className)
  } else {
    return container.querySelectorAll(className)
  }
}
 
var polyfill = function (container, className, single) {
  var classElements = [],
    tag = '*'
 
  var els = container.getElementsByTagName(tag)
  var elsLen = els.length
  var pattern = new RegExp('(^|\\s)' + className + '(\\s|$)')
  for (var i = 0, j = 0; i < elsLen; i++) {
    Eif (pattern.test(els[i].className)) {
      Iif (single) {
        return els[i]
      } else {
        classElements[j] = els[i]
        j++
      }
    }
  }
  return classElements
}
 
module.exports = (function () {
  return function (container, className, single, options) {
    options = options || {}
    if ((options.test && options.getElementsByClassName) || (!options.test && document.getElementsByClassName)) {
      return getElementsByClassName(container, className, single)
    } else if ((options.test && options.querySelector) || (!options.test && document.querySelector)) {
      return querySelector(container, className, single)
    } else {
      return polyfill(container, className, single)
    }
  }
})()