读取本地文件 · nodejs

package.json与main.js省略 index.html ``` <!DOCTYPE html> <html lang="zh-cn"> <head> <meta charset="utf-8"> <title>site title</title> </head> <body> <button id="btn">获取文件内容</button> <textarea id="textarea" cols="40" rows="20"></textarea> <script src="renderer/index.js"></script> </body> </html> ``` index.js ``` var fs=require("fs"); window.onload=function(){ var btn = this.document.querySelector("#btn"); //比ByID，ByClassName，ByTagName更强大的替代语法它的参数是CSS选择器出了#id、.class、还可以是[attribute='value']等 var textarea=this.document.querySelector("#textarea"); btn.onclick=function(){ fs.readFile("package.json",(err,data)=>{ //textarea.textContent=data; textarea.innerHTML=data; }); } } ```