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How to convert rich text into text using a small program

藏色散人
Release: 2020-03-18 09:43:34
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How to convert rich text into text using a small program

小程序怎么把富文本转换为文本?

微信小程序-富文本转文本

最近小程序这么火,我也来搞搞。发现了一个恶心的问题。小程序没有组件能支持富文本内容的,改接口又不太合适,于是有了这问,没技术含量纯粹记录

首先我们看眼没有被格式的富文本显示:

*.wxml内代码。content是富文本内容
    <view>
     <text>{{content}}</text>
    </view>
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显示结果:

How to convert rich text into text using a small program

小程序无法解析html

由以上图片看到,小程序无法解析html文件

我们需要处理html富文本内容,让其显示好看点

下面直接上代码了,主要功能就是利用js的replace 对富文本经行处理,大家可以看一下。一起优化,方便对富文本更好的处理。

convertHtmlToText: function convertHtmlToText(inputText) {
    var returnText = "" + inputText;
    returnText = returnText.replace(/<\/div>/ig, &#39;\r\n&#39;);
    returnText = returnText.replace(/<\/li>/ig, &#39;\r\n&#39;);
    returnText = returnText.replace(/<li>/ig, &#39;  *  &#39;);
    returnText = returnText.replace(/<\/ul>/ig, &#39;\r\n&#39;);
    //-- remove BR tags and replace them with line break
    returnText = returnText.replace(/<br\s*[\/]?>/gi, "\r\n");
    //-- remove P and A tags but preserve what&#39;s inside of them
    returnText=returnText.replace(/<p.*?>/gi, "\r\n");
    returnText=returnText.replace(/<a.*href="(.*?)".*>(.*?)<\/a>/gi, " $2 ($1)");
    //-- remove all inside SCRIPT and STYLE tags
    returnText=returnText.replace(/<script.*>[\w\W]{1,}(.*?)[\w\W]{1,}<\/script>/gi, "");
    returnText=returnText.replace(/<style.*>[\w\W]{1,}(.*?)[\w\W]{1,}<\/style>/gi, "");
    //-- remove all else
    returnText=returnText.replace(/<(?:.|\s)*?>/g, "");
    //-- get rid of more than 2 multiple line breaks:
    returnText=returnText.replace(/(?:(?:\r\n|\r|\n)\s*){2,}/gim, "\r\n\r\n");
    //-- get rid of more than 2 spaces:
    returnText = returnText.replace(/ +(?= )/g,&#39;&#39;);
    //-- get rid of html-encoded characters:
    returnText=returnText.replace(/ /gi," ");
    returnText=returnText.replace(/&/gi,"&");
    returnText=returnText.replace(/"/gi,&#39;"&#39;);
    returnText=returnText.replace(/</gi,&#39;<&#39;);
    returnText=returnText.replace(/>/gi,&#39;>&#39;);
   return returnText;
}
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将上面代码放入任意适合的小程序js文件中,

然后在需要处理数据的js文件里,引入文件,下面给出放入app.js文件中的调用示例:

var app = getApp()//获取app小程序实例
 onLoad: function (options) {
       wx.request({
      url: &#39;http://example.com/api&#39; + options.id+&#39;.json&#39;,
      headers: {
        &#39;Content-Type&#39;: &#39;application/json&#39;
      },
      success: function (res) {
       res.data.content =  app.convertHtmlToText(res.data.content )
         that.setData({
           art: res.data.content
         })
         console.log(res.data)
      }
    })
}
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然后编译刷新下,可以看到结果了:

How to convert rich text into text using a small program

结果

这里可以继续调整下css,使显示得更好看点。

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