Make a global search code and highlight it
This time I will bring you the precautions for making and highlighting the global search code and highlighting the global search code. The following 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 requireddom node, and achieve the highlighting effect through rich-text.
Code
wxml:<view class='homePage'>
<input bindinput="bindKeyInput"></input>
<view wx:for="{{newJson}}" wx:for-item='item' 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='sitem' wx:key>
<rich-text nodes="{{sitem}}"></rich-text>
</view>
</view>
</view>//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='color:red'>" + 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='color:red'>" + 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
})
}
})Webpack4.0 packaging optimization strategy summary_javascript skills
Key value string conversion JS method of json string
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