How to achieve result highlighting during global search

This time I will show you how to achieve result highlighting during global search. What are the precautions for achieving result highlighting during global search? Here is a practical case, let’s take a look.

Requirements

When I was working on a WeChat applet recently, I needed to achieve global matching and highlight effects when entering content in the search box. The current idea is , recursively return the data in the background, and replace the value of the object with the required dom node, and achieve the highlighting effect through rich-text.

Code

wxml:

<view class=&#39;homePage&#39;>
  <input bindinput="bindKeyInput"></input>
  <view wx:for="{{newJson}}" wx:for-item=&#39;item&#39; wx:key>
    <rich-text nodes="{{item.name}}"></rich-text>  
    <rich-text nodes="{{item.address}}"></rich-text>  
    <rich-text nodes="{{item.age}}"></rich-text>
    <view wx:if="{{item.aihao}}" wx:for="{{item.aihao}}" wx:for-item=&#39;sitem&#39; wx:key>
      <rich-text nodes="{{sitem}}"></rich-text>  
    </view>
  </view>
</view>

js:

//index.js
const app = getApp()
Page({
  data: {
    json: [{ name: 'eiolewkfp', age: 'awdqwwdk', address: 'aueifwhefwfheffoewjowef',aihao:['sdsd','sdfsd','sdsf']}, { name: '98797', age: '6544656', address: '65494364' }], // 可以是任何类型的数据
    newJson: '',
    tempText:''
  },
  onLoad: function (options) {
    this.setData({
      newJson:this.data.json
    })
  },
  digui: function (newJson,obj,key) { // 递归方法，来遍历最内层的字符串并通过正则来替换
    var that = this;
    var reg = new RegExp(that.data.tempText,'g');
    if (newJson.constructor == Array) { 
      newJson.forEach(function (item,index) {
        if (item.constructor == String){
          obj[key].splice(index, 1, item.replace(reg, "<span style=&#39;color:red&#39;>" + that.data.tempText + "</span>"))
        }else{
          that.digui(item, newJson);
        }
      });
    } else if (newJson.constructor == Object) {
      var json = {};
      for (var key in newJson) {
        json[key] = newJson;
        that.digui(newJson[key],newJson,key);
      }
    } else if (newJson.constructor == String) { // 这里做全局替换
      if(key){
        obj[key] = newJson.replace(reg, "<span style=&#39;color:red&#39;>" + that.data.tempText + "</span>")
      }
    }
  },
  bindKeyInput: function (e) { // 每次输入来监听键盘，处理匹配的数据
    var text = e.detail.value;
    this.setData({
      tempText:text
    })
    var newJson = JSON.parse(JSON.stringify(this.data.json)); // 实现深复制
    
    this.digui(newJson);
    this.setData({
      newJson:newJson
    })
  }
})

I believe you have mastered the method after reading the case in this article, more Please pay attention to other related articles on the php Chinese website!

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