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How to convert rich text into text using a small program

藏色散人
藏色散人Original
2020-03-18 09:43:343886browse

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
    
     {{content}}
    

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, '\r\n');
    returnText = returnText.replace(/<\/li>/ig, '\r\n');
    returnText = returnText.replace(/
  • /ig, ' * '); returnText = returnText.replace(/<\/ul>/ig, '\r\n'); //-- remove BR tags and replace them with line break returnText = returnText.replace(//gi, "\r\n"); //-- remove P and A tags but preserve what's inside of them returnText=returnText.replace(//gi, "\r\n"); returnText=returnText.replace(/(.*?)<\/a>/gi, " $2 ($1)"); //-- remove all inside SCRIPT and STYLE tags returnText=returnText.replace(/[\w\W]{1,}(.*?)[\w\W]{1,}<\/script>/gi, ""); returnText=returnText.replace(/[\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,''); //-- get rid of html-encoded characters: returnText=returnText.replace(/ /gi," "); returnText=returnText.replace(/&/gi,"&"); returnText=returnText.replace(/"/gi,'"'); returnText=returnText.replace(//gi,'>'); return returnText; }
  • 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: 'http://example.com/api' + options.id+'.json',
          headers: {
            'Content-Type': 'application/json'
          },
          success: function (res) {
           res.data.content =  app.convertHtmlToText(res.data.content )
             that.setData({
               art: res.data.content
             })
             console.log(res.data)
          }
        })
    }

    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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