popperEl的z-index 比较大, 会覆盖在其他元素上面 popperEl默认是插入body元素的(可以将popper-append-to-body设为false后不插入到body) popperEl是在mouseup事件里去做隐藏逻辑的, 而按下鼠标, 移动滚动条的时候, 并没有触发mouseup事件. popperEl并没有监听滚动事件(没法监听, 也没必要监听) 解决方案 方案一 ...
找到v-clickoutside指令之后, 豁然开朗 原来点击其他区域的时候, popperEl会自动关闭的奥秘在这里, 结合方案二的灵感, 现给出如下代码. // src/mixins/fackClickOutSide.jsletlock =true;letel =null;constMousedownEvent=newEvent('mousedown', {bubbles:true});constMouseupEvent=newEvent('mouseup', {bubbles:...
解决方案: 获取滚动元素容器获取后让下拉框失去焦点 let _this =this//解决 el-option超出元素区域setTimeout(() =>{ let operableTree=nulllet box= document.getElementById('operableTree') box.addEventListener('scroll', () =>{ clearTimeout(operableTree) operableTree= setTimeout(() =>{ //失去焦...
{ selectedItem: null, options: [ { key: '1', label: 'Option 1', value: 'value1' }, { key: '2', label: 'Option 2', value: 'value2' }, { key: '3', label: 'Option 3', value: 'value3' } ], selectedKey: null }; }, methods: { onOptionSelect(key) { this.selected...
el-option 使用报错#694 Closed lebron112opened this issueNov 25, 2020· 11 comments Copy link lebron112commentedNov 25, 2020• edited 当有数据时报的是 Cannot read property 'optionsCount' of undefined 点击选择时报的是 TypeError: Cannot read property 'emitsOptions' of null ...
// 设置选项框与输入框同宽度constselectOptionWidth =ref('')constcolumnContentSelect =ref(null)onMounted(()=>{nextTick(() =>{ selectOptionWidth.value= columnContentSelect.value.$el.offsetWidth+"px"; }); }) 原理:DOM挂载完毕后,获取 el-selcet宽度,并赋值给 el-option 。
要可视化展示设备数据,而这个设备数据非常多,一小时就能产生上百万条数据,传过来的json文件都有几百兆大小;我使用的vue3 vite echarts chrome单标签4g内存爆了 7 回答4.6k 阅读✓ 已解决 如何在JavaScript中简洁地初始化多个变量为null? js中定义三个变量 let resourceId = uniqueNo = unitName = null; 能...
Vue Version:3.4.15 Element Plus Version:2.3.10 Browser / OS:Chrome 123.0.6312.106 Build Tool:Webpack Reproduction Related Component el-select Reproduction Link Element Plus Playground Steps to reproduce 空的el-select中, 无法回显value为空的option的label ...
2019-11-21 11:47 −转载出处:https://www.cnblogs.com/rjzheng/p/9163246.html 引言 在文章的开头,先说下NPE问题,NPE问题就是,我们在开发中经常碰到的NullPointerException.假设我们有两个类,他们的UML类图如下图所示 在这种情况下,有如下代码 u... ...
Rejecting null arguments with a NPE is suboptimal as it blurs the line between caller error and callee error, as the rejection of a parameter is indistinguishable from an accidental null-dereference somewhere in the called code. That's w...