解决el-select嵌套el-select点击内部下拉框选项导致外部下拉框消失问题。

是由于点击内部下拉框选项导致外部select组件clickOutside监听事件触发导致的。解决办法：内部select组件下拉框打开时暂时移除外部mouseUp监听函数，外部select组件添加 ref="xxx"属性，内部select添加 @visible-Change=""visibleChange"事件函数

visibleChange(value) {

if (value) {

this.documentHandler =this.$refs.xxx.$el['@@clickoutsideContext'].documentHandler

this.$refs.xxx.$el['@@clickoutsideContext'].documentHandler = (mouseup = {}, mousedown = {}) => {}

} else {

this.$refs.xxx.$el['@@clickoutsideContext'].documentHandler = this.documentHandler

}

},