How to control the display and concealment of the corresponding content of input in vue - Codes Helper - Programming Question Answer

How to control the display and concealment of the corresponding content of input in vue

Why do I call the arr2 method three times in mount? how do I display the corresponding content of the lower input when the value of input changes? now it keeps showing, I can"t control it to show and hide in arr2

@{
    ViewBag.Title = "Index";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

<div id="itany">
    <ul class="form-ul">
        <li class="form-item">
            <h4 class="form-title"></h4>
            <input type="text" v-model="name" class="form-input">
            <i class="icon pen"></i>
        </li>
    </ul>
    <p v-for="(v,k) in arr2" :key="k" v-show="flag">
        {{v}}
    
</div>
<!---->
<script>
    //export default{
    //   create(){
    //       this.request();
    //   },
    //   methods:{
    //    request(){  
    //    }
    //}
    //}
    //import axios from "./axios" 
    //Vue.prototype.$http = axios

    var vm = new Vue({
        el:"-sharpitany",
        data:{
            flag:false,
            arr:["","alex","mark"],
            name:""
        },
        //
        created: function(){


       },
        
        computed:{
            arr2:function () {
                var temp=[];
                //console.log(this.flag);
                
                this.arr.forEach(val=> {
                    if(val.includes(this.name)){
                    this.flag=true;
                    temp.push(val);
                console.log(this);
            }
        });
        console.log(temp);
        return temp;
    }
    }
    })

</script>

Javascript vue.js

Mar.01,2021

<div id="itany">
    <ul class="form-ul">
      <li class="form-item">
        <h4 class="form-title"></h4>
        <input type="text" v-model="name" class="form-input" @input="changeName">
        <i class="icon pen"></i>
      </li>
    </ul>
    <p v-for="(v,k) in arr2" :key="k">{{v}}
  </div>

data () {
      return {
        flag: false,
        arr: ['', 'alex', 'mark'],
        arr2: [],
        name: ''
      };
    },
    
    methods: {
      changeName () {
        this.arr2 = [];
        if (this.name) {
          this.arr.forEach(val => {
            if (val.includes(this.name)) {
              this.flag = true;
              this.arr2.push(val);
            }
          });
        }
      }
    }

none of you understand what other people think.
he wants to make a fuzzy query.
first of all, you get rid of that v-show. Because it doesn't work.
v-for an empty array. Of course there's nothing.
wrong judgment.
'Manager'. Manager ('') / / true
you add a this.name! ='
perfect result.
< input v index model = "str" / >
< div v for = "(item,index) in list2": key= "index" >

{{item}}

< / div >
computed: {

  list2:function(){
        let arr = [];
        let that = this;
        this.list.map((item,index)=>{
            if(item.includes(that.str) && that.str !=''){
                console.log(item)
                arr.push(item)
            }
        })
        return arr;
  }

}

try changing v-show to v-if

@ change event is fine, isn't it? According to your expression? What is involved in calculating attributes?

It is wrong to hide the operation in the

computed method. You can add more listeners to the input. The initial display is false, only if the name value of v-model is not empty, set to true

.

    methods:{
        showList:function(){
            if(this.name!=""){
                this.flag=true;
            }else{
                this.flag=false;
            } 
        }
    }

Previous: There are three ul, on my page. I switch the contents of the ul when I click, but when I switch, I will see the content of the previous ul flash. How to solve the problem of flashing?

Next: I want to use php to make a Monty Hall question. How do you write the logic?

The vue project introduces particles.js to realize the particle effect, but there is a problem when switching pages?
In the vue-cli project, I directly introduced the particls library into index.html, and the related files are placed in the static directory . <div id="particles-js">< div> <script type="text javascript" src="s...

Front-end javascript vue.js

Feb.26,2021
The vue component library is loaded on demand, is the entire component library packaged or only the components that are packaged?
there are two schemes for vue packaging optimization: 1. Load components on demand, packaged in blocks instead of in a js file 2. Cdn, a component library that does not need to be changed, is introduced to configure webpack, not to package these files....

Javascript vue.js

Feb.27,2021
Calendar selection problem
is like this, our manager gave me a requirement: that is to enter a time, and then you can display the day of the week corresponding to the current date in the calendar, and you can select the next three months in the calendar. I can t choose the rest o...

Javascript vue.js

Feb.27,2021
Vue ssr failed. The rendered html is undefined.
I want to try to write a ssr demo, without routing and data prefetching. The basic usage of demo in the official website document is no problem, but there is a problem when I want to switch to component development. The rendered page is empty. This is m...

Javascript vue.js

Feb.27,2021
How to achieve automatic focus and jump in vue?
as shown in the figure, v-for generates input, in Vue. When the add button is clicked, the cursor automatically focuses on the latest input, window and automatically moves to the appropriate location! ...

Css html javascript vue.js

Feb.27,2021
How to click the @ click event in vue to copy some data from data to the clipboard
as the title, @ click event, to get some data data, you need to put this content in the clipboard. ...

Javascript vue.js

Feb.28,2021
Can't the values of Vue mavon-editor bindings be rendered in the editor?
when I save the mavon-editor edited content to the database, I still want to put it in the editor to continue editing, but I found that the bound value mavon-editor is directly output to me as is, what should I do? <mavon-editor v-model="commen...

Javascript vue.js

Feb.28,2021
About setting the textarea cursor position?
1. The requirements are as follows has a textarea tag. You need to get the position of the cursor and insert the specified content according to the position of the cursor. bind the value of textarea bidirectionally through v-model, and bind the i...

Javascript vue.js

Feb.28,2021
The problem of vue axios carrying cookie is very serious!
Axios request cannot carry cookie, each login creates a new session, according to the instructions given online, a withCredent=true, is added as follows: : but still can t get cookie, to ask for help, the kind of urgent ...

Node.js java javascript vue.js

Feb.28,2021
ElementUI Select component filter-method problem
there is a requirement that when Select selects a city, it needs fuzzy search, which supports not only Chinese, but also pinyin, acronyms and so on. The back end will give me the corresponding fields, but I find that using filter-method to pass in funct...

Javascript vue.js element-ui

Feb.28,2021
How to add components dynamically by vue
requirements are as follows: click the addFisrt button to add the content of the first component, click addSecond to dynamically add the content of the second component and can add without limit ~ ask the great gods to provide ideas and methods ~ thank ...

Html html5 javascript vue.js

Feb.28,2021
In vue, input is limited to 2 decimal places at most, and the function is implemented, but there are minor flaws.
there is an input in vue I use v-model and watch to get the input number, and now enter at most 2 decimal places although the function is realized, but when entering, you can actually enter 3 decimal places, but I intercepted the input data through wat...

Javascript vue.js

Feb.28,2021
Vue listens for browser window close events
I want to clear cookie, after closing the window. How can I listen for the window closing event in vue? ...

Javascript vue.js

Feb.28,2021
How to test vue
in a project, how to use vue for unit testing. For example, I want to test uploading a file, parsing the file into json, and sending it to the backend to get the returned value ...

Javascript vue.js

Mar.01,2021
How does webpack use the server's environment variables?
how to use the environment variables on the linux service in the configuration file, ...

Javascript vue.js webpack

Mar.01,2021
Events in vue2
< template > < div class= "topic " > <a href=" " @click.native="get()">btn< a> <li><a @click="fn()">< a>< li> <button @click="post()">btn< button> ...

Javascript vue.js

Mar.01,2021
Vue a list of requirements scenario questions
now switching between different records will have different arrays, such as . I think of two methods (1) I first get five types of records through the interface, put them in five arrays of data, and assign values to the arrays to be rendered by cli...

Javascript vue.js

Mar.01,2021
Vue Custom form input component problem
1. There is a value that references the parent component (props: [ value ]) when defining the child component, but why not pass in the value from the parent component when referencing? 2. Refer to whether the value of the bidirectional binding price...

Javascript vue.js

Mar.01,2021
Vue $event parent-child component communication parameter transfer principle?
the parent component pays the child component parameter values to title $event argument[0] VUE ...

Javascript vue.js

Mar.02,2021
Execute the npm run dev startup project in git and display an error?
The versions of node and npm are : Cannot GET npm install css-loadernpm run dev excuse me, why is this? How to solve it? ...

Javascript vue.js npm node.js

Mar.02,2021

Menu