chenhaodong / mew-iview

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src/utils/assist.js 2.26 KB
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7fa943eb   梁灏   init 
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  // 判断参数是否是其中之一
7c15ac9e   梁灏   add Message compo... 
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  export function oneOf (value, validList) {
7fa943eb   梁灏   init 
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      for (let i = 0; i < validList.length; i++) {
          if (value === validList[i]) {
              return true;
          }
      }
      return false;
7c15ac9e   梁灏   add Message compo... 
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  }
  
  export function camelcaseToHyphen (str) {
      return str.replace(/([a-z])([A-Z])/g, '$1-$2').toLowerCase();
be966e9f   梁灏   add Modal component 
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  }
  
  // For Modal scrollBar hidden
  let cached;
  export function getScrollBarSize (fresh) {
      if (fresh || cached === undefined) {
          const inner = document.createElement('div');
          inner.style.width = '100%';
          inner.style.height = '200px';
  
          const outer = document.createElement('div');
          const outerStyle = outer.style;
  
          outerStyle.position = 'absolute';
          outerStyle.top = 0;
          outerStyle.left = 0;
          outerStyle.pointerEvents = 'none';
          outerStyle.visibility = 'hidden';
          outerStyle.width = '200px';
          outerStyle.height = '150px';
          outerStyle.overflow = 'hidden';
  
          outer.appendChild(inner);
  
          document.body.appendChild(outer);
  
          const widthContained = inner.offsetWidth;
          outer.style.overflow = 'scroll';
          let widthScroll = inner.offsetWidth;
  
          if (widthContained === widthScroll) {
              widthScroll = outer.clientWidth;
          }
  
          document.body.removeChild(outer);
  
          cached = widthContained - widthScroll;
      }
      return cached;
3e855e34   梁灏   fixed #46 
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  }
  
  // watch DOM change
69576f47   梁灏   add Slider component 
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  export const MutationObserver = window.MutationObserver || window.WebKitMutationObserver || window.MozMutationObserver || false;
  
  const SPECIAL_CHARS_REGEXP = /([\:\-\_]+(.))/g;
  const MOZ_HACK_REGEXP = /^moz([A-Z])/;
  
  function camelCase(name) {
      return name.replace(SPECIAL_CHARS_REGEXP, function(_, separator, letter, offset) {
          return offset ? letter.toUpperCase() : letter;
      }).replace(MOZ_HACK_REGEXP, 'Moz$1');
  }
  // getStyle
  export function getStyle (element, styleName) {
      if (!element || !styleName) return null;
      styleName = camelCase(styleName);
      if (styleName === 'float') {
          styleName = 'cssFloat';
      }
      try {
          var computed = document.defaultView.getComputedStyle(element, '');
          return element.style[styleName] || computed ? computed[styleName] : null;
      } catch(e) {
          return element.style[styleName];
      }
  }