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javascript check if file exists on server

By ScriperScriper on Sep 02, 2020 
function doesFileExist(urlToFile) {
    var xhr = new XMLHttpRequest();
    xhr.open('HEAD', urlToFile, false);
    xhr.send();
     
    if (xhr.status == "404") {
        return false;
    } else {
        return true;
    }
}

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javascript file exists check

By ScriperScriper on Jun 30, 2020 
// checking existence of file synchronously
function doesFileExist(urlToFile) {
    var xhr = new XMLHttpRequest();
    xhr.open('HEAD', urlToFile, false);
    xhr.send();
     
    return xhr.status !== 404;
}

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js check file exist

By Im_ArxusIm_Arxus on Apr 12, 2021 
import fs from 'fs';

const path = './file.txt';

try {
  if (fs.existsSync(path)) {
    //file exists
  }
} catch(err) {
  console.error(err);
}

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check if file exists javascript

By TC5550TC5550 on May 20, 2020 
function executeIfFileExist(src, callback) {
    var xhr = new XMLHttpRequest()
    xhr.onreadystatechange = function() {
        if (this.readyState === this.DONE) {
            callback()
        }
    }
    xhr.open('HEAD', src)
}

Source: stackoverflow.com

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