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> 源碼地址：https://github.com/naihe138/vue-picker/blob/master/src/index.vue
-----

> 原理：就是將 body  position:fixed 設置上，這樣底部就不會滑動起來了

```js

fixedBody() {
        const scrollTop = document.body.scrollTop || document.documentElement.scrollTop
        this.prevBodyCss = document.body.style.cssText
        document.body.style.cssText += 'position:fixed;width:100%;top:-' + scrollTop + 'px;'
      },
      looseBody() {
        const body = document.body
        const top = body.style.top
        body.style.cssText = this.prevBodyCss
        body.scrollTop = document.documentElement.scrollTop = -parseInt(top)
        body.style.top = ''
      }

```

                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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