如何使用Javascript读取本地文本文件并逐行读取? [英] How to use Javascript to read local text file and read line by line?

问题描述

我有一个由 html+javascript 制作的网页，这是演示，我想知道如何读取本地 csv 文件并逐行读取，以便我可以从 csv 文件中提取数据.

I have a web page made by html+javascript which is demo, I want to know how to read a local csv file and read line by line so that I can extract data from the csv file.

推荐答案

没有 jQuery:

document.getElementById('file').onchange = function(){

  var file = this.files[0];

  var reader = new FileReader();
  reader.onload = function(progressEvent){
    // Entire file
    console.log(this.result);

    // By lines
    var lines = this.result.split('
');
    for(var line = 0; line < lines.length; line++){
      console.log(lines[line]);
    }
  };
  reader.readAsText(file);
};

HTML:

<input type="file" name="file" id="file">

记得在文件字段呈现后放置你的javascript代码.

Remember to put your javascript code after the file field is rendered.

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