求解el-tree标签里面嵌套元素tree树节点的文字就全部不显示?

原本的需求是:数组里放很多分类对象,分类里面有子列表里面是分类文章对象和子分类对象,子分类对象里有子列表里面是分类文章和分类对象,层级不定,节点树展示分类名和文章名,但是分类名只是展示,分类文章名可点击,点击后右侧显示文章详情

这是数据结构,因为需要一个node-key但是我这后端没返回,我就把拿到的所有数据通过函数循环一遍,里面新增一个aid属性使用,aid = categoryIds+articleId,如果没有categoryIds和articleId我会给aid=null,又一部分aid都是null,但是没影响展示

data: [

{

name: '分类',

categoryId: '245',

list:[

{

name: '文章',

articleId: '220',

categoryIds: "96,102,245,"

},

{

name: '分类',

categoryId: '',

list: [

{

name: '文章',

articleId: '221',

categoryIds: "96,102,246,"

},

]

},

]

},

{...},

{...},

]

 tree: [],

defaultProps: {

id: 'aid',

children: 'categoryAndArticleList',

label: 'name',

disabled: 'disabled',

},

lastSelectedAid: '',//上次选中aid

articleIdList: [],//当前menu全部文章

 getMenu() {

//这上面一部分是拿menu的值和处理menu的值 下面的是tree节点的

this.loadingAll = true;

fetchListCategory({sign: this.treeFrom.sign}).then(response => {

const filterArr = ["入门手册", "FAQ"];

const filteredData = response.data.data.categoryAndArticleList.filter(item => {return filterArr.includes(item.name);});

this.searCategoryId = filteredData[0].categoryId+','+filteredData[1].categoryId;

console.log("this.searCategoryId",typeof this.searCategoryId,this.searCategoryId);

for (let i = 0; i < filteredData.length; i++) {

if (filteredData[i].name === '入门手册') {

filteredData[i].icon = '/img/help/rumenshouce.jpg';

}

if (filteredData[i].name === 'FAQ') {

filteredData[i].icon = '/img/help/FAQ.jpg';

}

}

let data = filteredData || [];

data.push({name: '视频教程', descr: '手把手视频教学', icon: '/img/help/shipinjiaocheng.jpg'}, {

name: '更新日志',

descr: '版本更新内容合集',

icon: '/img/help/gengxinrizhi.jpg'

})

this.menu = data;

let menuList = data[parseInt(this.activeIndex)];

this.infoName = menuList.name;

// 从这里开始把拿到的tree数据循环处理

let childrenList = menuList.categoryAndArticleList;

if (childrenList) {

let tree = JSON.parse(JSON.stringify(childrenList));

//调用循环函数给每个对象新增aid用来当node-key

this.processCategoryAndArticleList(tree);

this.tree = tree;

} else {

this.tree = [];

}

console.log("this.tree", this.tree);

//进来默认选中第一篇文章

if (this.firstArticleId) {

this.$nextTick(() => {

if (this.articleIdList.length > 0) {

console.log("this.articleIdList", this.articleIdList);

this.$refs.tree.setCurrentKey(this.articleIdList[0].aid)

this.lastSelectedAid = this.articleIdList[0].aid;

//调用文章详情传递第一批文章的id

this.getDoc(this.articleIdList[0].articleId);

} else {

this.doc = {};

}

})

}

this.firstArticleId = false;

this.loadingAll = false // 请求成功后关闭 loading

}).catch(error => {

console.log(error);

}).finally(() => {

this.loadingAll = false // 请求完成后关闭loading

})

},

// 声明一个递归函数,用于处理categoryAndArticleList列表

processCategoryAndArticleList(list) {

list.forEach(item => {

if (item.categoryIds && item.articleId) {

//aid = 96102245220; categoryIds: "96,102,245," + articleId: "220"

item.aid = item.categoryIds.split(',').join('') + item.articleId;

} else {

item.aid = null;

item.disabled = true;

}

// console.log("aid===",item.aid);

if (item.articleId) {

item.name = item.title;

this.$nextTick(() => {

//所有的文章id和拼接后的aid都存起来

this.articleIdList.push({aid: item.aid, articleId: item.articleId});

})

} else {

}

if (item.categoryAndArticleList) {

this.processCategoryAndArticleList(item.categoryAndArticleList);

const trueItem = item.categoryAndArticleList.find(subItem => subItem.articleId);

if (trueItem) {

if (item.name===false) {

item.name = trueItem.title;

}

} else {

}

}

});

},

在这新需求之前节点是正常显示文字的。
新增需求:节点文字过长以...隐藏,鼠标悬浮在节点上显示悬浮的文字
求解el-tree标签里面嵌套元素tree树节点的文字就全部不显示?
但是有一个问题,我这个el-tree里面放入元素,树节点上的文字就不显示了,也不报错,不知道为啥
我先是按照大家常规方法写的,但是el-tree标签里面写了{{node}}----{{data}}tree节点树上文字不显示,不报错
求解el-tree标签里面嵌套元素tree树节点的文字就全部不显示?

<el-tree :data="tree" :props="defaultProps" ref="tree"

node-key="aid" icon-class="el-icon-arrow-down" :render-content="renderContent"

@node-click="handleNodeClick" highlight-current default-expand-all

v-if="infoName!=='视频教程'&&infoName!=='更新日志'">

<template slot-scope="{ node,data }"><span>{{node}}----{{data}}<span></template>

</el-tree>

接着用render-content事件还是不行,不显示也不报错,我怀疑是循环函数的事情,但是不知道怎么改
求解el-tree标签里面嵌套元素tree树节点的文字就全部不显示?

<el-tree :data="tree" :props="defaultProps" ref="tree"

node-key="aid" icon-class="el-icon-arrow-down" :render-content="renderContent"

@node-click="handleNodeClick" highlight-current default-expand-all>

</el-tree>

renderContent(h, { node, data }) {

return (

<template>

<el-tooltip content={data.name} placement="top">

<span>{data.name}</span>

<div slot="content">

<span>{data.name}</span>

</div>

</el-tooltip>

</template>

)

},


回答:

解决了,先放答案
<el-tree :data="tree" :props="defaultProps" ref="tree"

                       node-key="aid" icon-class="el-icon-arrow-down"

@node-click="handleNodeClick" highlight-current default-expand-all

v-if="infoName!=='视频教程'&&infoName!=='更新日志'">

<template slot-scope="{ node, data }" class="custom-tree-node showname">

<el-link class="custom-tree-node-label">

<span :class="{'treeNotLeaf' : !data.articleId}" :title="data.name">{{data.name}}</span>

</el-link>

</template>

</el-tree>

我使用node.name的时候一直提示
TypeError: Converting circular structure to JSON

--> starting at object with constructor 'Node'

| property 'store' -> object with constructor 'TreeStore'

| property 'currentNode' -> object with constructor 'Node'

| ...

| property 'parent' -> object with constructor 'Node'

--- property 'parent' closes the circle,

我怀疑是递归循环问题,尝试使用插件flatted来扁平化数据未果,手动扁平化数据同上,
多加一个标签提示我Multiple root nodes returned from render function. Render function should return a single root node.把标签都删了,给el-tree绑定一个v-model变量把值给它也不行 <el-tree :data="tree" :props="defaultProps" v-model="selectedNode">

  <span class="custom-tree-node" slot-scope="{ node, data }">

<span>{{ node }} {{ data }}</span>

</span>

</el-tree>

就在我心灰意冷,脑袋开始犯困中,看岔劈代码了,把上面el-tree里的代码复制成下面el-table的了,又一次把和很多文章中大差不差的代码又复制到我的el-tree里面,哎!怎么出现静态文字了,也不报错了,怎么回事?我尝试打印{{node}} {{data}}页面卡死,删掉访问node.name,node.label页面卡死,访问{{data},啊?出来数据了,访问{{data.name}}出现动态文字了,哦吼~可以了,我又把el-button换成el-link和el-tag有效果,换成span和div就不行,赶紧动态加上一个class把分类加粗字体加大,再用上我之前看到的文字悬浮的文章,el-tree有自带的悬浮文字,:title=data.name,至此悬浮文字需求解决

复制的这篇文章,感谢作者
https://zhuanlan.zhihu.com/p/419193568

<template slot-scope="scope">

        <el-button

@click="removeRow(scope.row)"

type="danger"

plain

size="small"

>移除</el-button

>

</template>

以上是 求解el-tree标签里面嵌套元素tree树节点的文字就全部不显示? 的全部内容, 来源链接: utcz.com/p/934834.html

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