如何从JavaScript中的字符串修剪文件扩展名？

#1 楼

filename.split('.').slice(0, -1).join('.')

#2 楼

x.replace(/\.[^/.]+$/, "")

#3 楼

const path = require('path');
const filename = 'hello.html';
    
path.parse(filename).name;     //=> "hello"
path.parse(filename).ext;      //=> ".html"
path.parse(filename).basename; //=> "hello.html"

#4 楼

parts = x.match(/[^\.]+/);
x = parts[0];

parts = x.split(".");
x = parts[0];

#5 楼

var x = 'filename.jpg';
var f = x.substr(0, x.lastIndexOf('.'));

function removeExtension(filename){
    var lastDotPosition = filename.lastIndexOf(".");
    if (lastDotPosition === -1) return filename;
    else return filename.substr(0, lastDotPosition);
}

#6 楼

filename.substring(0, filename.lastIndexOf('.')) || filename

#7 楼

#8 楼

String.prototype.beforeLastIndex = function (delimiter) {
    return this.split(delimiter).slice(0,-1).join(delimiter) || this + ""
}

"image".beforeLastIndex(".") // "image"
"image.jpeg".beforeLastIndex(".") // "image"
"image.second.jpeg".beforeLastIndex(".") // "image.second"
"image.second.third.jpeg".beforeLastIndex(".") // "image.second.third"

var filename = "this.is.a.filename.txt";
console.log(filename.split(".").slice(0,-1).join(".") || filename + "");

String.prototype.beforeLastIndex = function (delimiter) {
    return this.substr(0,this.lastIndexOf(delimiter)) || this + ""
}

#9 楼

name = filename.split(".");
// trimming with pop()
name.pop();
// getting the name with join()
name.join('.'); // we split by '.' and we join by '.' to restore other eventual points.

#10 楼

x.split(".").slice(0, -1).join(".")

#11 楼

filename.replace(/\.[^.$]+$/, '');

#12 楼

var n = str.lastIndexOf(".");
return n > -1 ? str.substr(0, n) : str;

#13 楼

var name = "2015-01-01_backup.tar.gz";
name.replace(/(\.[^/.]+)+$/, "");

#14 楼

theName = thePath.split("/").slice(-1).join().split(".").shift();

theName = theNameWithExt.split(".").shift();

 var thePath = "http://stackoverflow.com/directory/subdirectory/filename.jpg";
theName = thePath.split("/").slice(-1).join().split(".").shift();
alert(theName); 

 var theNameWithExt = "filename.jpg";
theName = theNameWithExt.split("/").slice(-1).join().split(".").shift();
alert(theName); 

 var theNameWithExt = "filename.tar.gz";
theName = theNameWithExt.split("/").slice(-1).join().split(".").shift();
alert(theName); 

#15 楼

var fileName = "something.extension";
fileName.slice(0, -path.extname(fileName).length) // === "something"

#16 楼

#!/usr/bin/env node
const path = require('path');
const filename = 'path/hello.html';
const filename_parsed = path.parse(filename);
console.log(path.join(filename_parsed.dir, filename_parsed.name));

path/hello

#17 楼

#18 楼

// assuming var x = filename.jpg or some extension
x = x.replace(/(.*)\.[^.]+$/, "");

#19 楼

    yourStr = yourStr.slice(0, -4); // 'test'

#20 楼

var MYPATH = '/User/HELLO/WORLD/FILENAME.js';
var MYEXT = '.js';
var fileName = path.basename(MYPATH, MYEXT);
var filePath = path.dirname(MYPATH) + '/' + fileName;

> filePath
'/User/HELLO/WORLD/FILENAME'
> fileName
'FILENAME'
> MYPATH
'/User/HELLO/WORLD/FILENAME.js'

#21 楼

var filename = "my.letter.txt" // some filename

var substrings = filename.split('.'); // split the string at '.'
if (substrings.length == 1)
{
  return filename; // there was no file extension, file was something like 'myfile'
}
else
{
  var ext = substrings.pop(); // remove the last element
  var name = substrings.join(""); // rejoin the remaining elements without separator
  name = ([name, ext]).join("."); // readd the extension
  return name;
}

#22 楼

x.slice(0, -(x.split('.').pop().length + 1));

#23 楼