btgym/src/utils/getclass.js

// 操作dom
export function getClass (ele) {
    return ele.className.replace(/\s+/, ' ').split(' ')
  }
  
  export function hasClass (ele, cls) {
    return (' ' + ele.className + ' ').indexOf(' ' + cls + ' ') > -1
  }
  
  export function addClass (ele, cls) {
    if (!hasClass(ele, cls)) {
      ele.className += ' ' + cls
      var curClass = ele.className
  
      var classes = (cls || '').split(' ')
      for (var i = 0, j = classes.length; i < j; i++) {
        var clsName = classes[i]
        if (!clsName) continue
  
        if (ele.classList) {
          ele.classList.add(clsName)
        } else if (!hasClass(ele, clsName)) {
          curClass += ' ' + clsName
        }
      }
      if (!ele.classList) {
        ele.className = curClass
      }
    }
  }
  
  export function removeClass (ele, cls) {
    if (hasClass(ele, cls)) {
      var reg = new RegExp('(\\s|^)' + cls + '(\\s|$)', 'gi')
      ele.className = ele.className.replace(reg, ' ')
    }
  }
  
  export function toggleClass (ele, cls) {
    if (hasClass(ele, cls)) {
      removeClass(ele, cls)
    } else {
      addClass(ele, cls)
    }
  }